# # # Copyright (C) 2006, 2007 Google Inc. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, but # WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU # General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA # 02110-1301, USA. """Module implementing the master-side code.""" # pylint: disable-msg=W0613,W0201 import os import os.path import sha import time import tempfile import re import platform from ganeti import rpc from ganeti import ssh from ganeti import logger from ganeti import utils from ganeti import errors from ganeti import hypervisor from ganeti import config from ganeti import constants from ganeti import objects from ganeti import opcodes from ganeti import ssconf class LogicalUnit(object): """Logical Unit base class. Subclasses must follow these rules: - implement CheckPrereq which also fills in the opcode instance with all the fields (even if as None) - implement Exec - implement BuildHooksEnv - redefine HPATH and HTYPE - optionally redefine their run requirements (REQ_CLUSTER, REQ_MASTER); note that all commands require root permissions """ HPATH = None HTYPE = None _OP_REQP = [] REQ_CLUSTER = True REQ_MASTER = True def __init__(self, processor, op, cfg, sstore): """Constructor for LogicalUnit. This needs to be overriden in derived classes in order to check op validity. """ self.proc = processor self.op = op self.cfg = cfg self.sstore = sstore self.__ssh = None for attr_name in self._OP_REQP: attr_val = getattr(op, attr_name, None) if attr_val is None: raise errors.OpPrereqError("Required parameter '%s' missing" % attr_name) if self.REQ_CLUSTER: if not cfg.IsCluster(): raise errors.OpPrereqError("Cluster not initialized yet," " use 'gnt-cluster init' first.") if self.REQ_MASTER: master = sstore.GetMasterNode() if master != utils.HostInfo().name: raise errors.OpPrereqError("Commands must be run on the master" " node %s" % master) def __GetSSH(self): """Returns the SshRunner object """ if not self.__ssh: self.__ssh = ssh.SshRunner(self.sstore) return self.__ssh ssh = property(fget=__GetSSH) def CheckPrereq(self): """Check prerequisites for this LU. This method should check that the prerequisites for the execution of this LU are fulfilled. It can do internode communication, but it should be idempotent - no cluster or system changes are allowed. The method should raise errors.OpPrereqError in case something is not fulfilled. Its return value is ignored. This method should also update all the parameters of the opcode to their canonical form; e.g. a short node name must be fully expanded after this method has successfully completed (so that hooks, logging, etc. work correctly). """ raise NotImplementedError def Exec(self, feedback_fn): """Execute the LU. This method should implement the actual work. It should raise errors.OpExecError for failures that are somewhat dealt with in code, or expected. """ raise NotImplementedError def BuildHooksEnv(self): """Build hooks environment for this LU. This method should return a three-node tuple consisting of: a dict containing the environment that will be used for running the specific hook for this LU, a list of node names on which the hook should run before the execution, and a list of node names on which the hook should run after the execution. The keys of the dict must not have 'GANETI_' prefixed as this will be handled in the hooks runner. Also note additional keys will be added by the hooks runner. If the LU doesn't define any environment, an empty dict (and not None) should be returned. As for the node lists, the master should not be included in the them, as it will be added by the hooks runner in case this LU requires a cluster to run on (otherwise we don't have a node list). No nodes should be returned as an empty list (and not None). Note that if the HPATH for a LU class is None, this function will not be called. """ raise NotImplementedError class NoHooksLU(LogicalUnit): """Simple LU which runs no hooks. This LU is intended as a parent for other LogicalUnits which will run no hooks, in order to reduce duplicate code. """ HPATH = None HTYPE = None def BuildHooksEnv(self): """Build hooks env. This is a no-op, since we don't run hooks. """ return {}, [], [] def _AddHostToEtcHosts(hostname): """Wrapper around utils.SetEtcHostsEntry. """ hi = utils.HostInfo(name=hostname) utils.SetEtcHostsEntry(constants.ETC_HOSTS, hi.ip, hi.name, [hi.ShortName()]) def _RemoveHostFromEtcHosts(hostname): """Wrapper around utils.RemoveEtcHostsEntry. """ hi = utils.HostInfo(name=hostname) utils.RemoveEtcHostsEntry(constants.ETC_HOSTS, hi.name) utils.RemoveEtcHostsEntry(constants.ETC_HOSTS, hi.ShortName()) def _GetWantedNodes(lu, nodes): """Returns list of checked and expanded node names. Args: nodes: List of nodes (strings) or None for all """ if not isinstance(nodes, list): raise errors.OpPrereqError("Invalid argument type 'nodes'") if nodes: wanted = [] for name in nodes: node = lu.cfg.ExpandNodeName(name) if node is None: raise errors.OpPrereqError("No such node name '%s'" % name) wanted.append(node) else: wanted = lu.cfg.GetNodeList() return utils.NiceSort(wanted) def _GetWantedInstances(lu, instances): """Returns list of checked and expanded instance names. Args: instances: List of instances (strings) or None for all """ if not isinstance(instances, list): raise errors.OpPrereqError("Invalid argument type 'instances'") if instances: wanted = [] for name in instances: instance = lu.cfg.ExpandInstanceName(name) if instance is None: raise errors.OpPrereqError("No such instance name '%s'" % name) wanted.append(instance) else: wanted = lu.cfg.GetInstanceList() return utils.NiceSort(wanted) def _CheckOutputFields(static, dynamic, selected): """Checks whether all selected fields are valid. Args: static: Static fields dynamic: Dynamic fields """ static_fields = frozenset(static) dynamic_fields = frozenset(dynamic) all_fields = static_fields | dynamic_fields if not all_fields.issuperset(selected): raise errors.OpPrereqError("Unknown output fields selected: %s" % ",".join(frozenset(selected). difference(all_fields))) def _BuildInstanceHookEnv(name, primary_node, secondary_nodes, os_type, status, memory, vcpus, nics): """Builds instance related env variables for hooks from single variables. Args: secondary_nodes: List of secondary nodes as strings """ env = { "OP_TARGET": name, "INSTANCE_NAME": name, "INSTANCE_PRIMARY": primary_node, "INSTANCE_SECONDARIES": " ".join(secondary_nodes), "INSTANCE_OS_TYPE": os_type, "INSTANCE_STATUS": status, "INSTANCE_MEMORY": memory, "INSTANCE_VCPUS": vcpus, } if nics: nic_count = len(nics) for idx, (ip, bridge, mac) in enumerate(nics): if ip is None: ip = "" env["INSTANCE_NIC%d_IP" % idx] = ip env["INSTANCE_NIC%d_BRIDGE" % idx] = bridge env["INSTANCE_NIC%d_HWADDR" % idx] = mac else: nic_count = 0 env["INSTANCE_NIC_COUNT"] = nic_count return env def _BuildInstanceHookEnvByObject(instance, override=None): """Builds instance related env variables for hooks from an object. Args: instance: objects.Instance object of instance override: dict of values to override """ args = { 'name': instance.name, 'primary_node': instance.primary_node, 'secondary_nodes': instance.secondary_nodes, 'os_type': instance.os, 'status': instance.os, 'memory': instance.memory, 'vcpus': instance.vcpus, 'nics': [(nic.ip, nic.bridge, nic.mac) for nic in instance.nics], } if override: args.update(override) return _BuildInstanceHookEnv(**args) def _HasValidVG(vglist, vgname): """Checks if the volume group list is valid. A non-None return value means there's an error, and the return value is the error message. """ vgsize = vglist.get(vgname, None) if vgsize is None: return "volume group '%s' missing" % vgname elif vgsize < 20480: return ("volume group '%s' too small (20480MiB required, %dMib found)" % (vgname, vgsize)) return None def _InitSSHSetup(node): """Setup the SSH configuration for the cluster. This generates a dsa keypair for root, adds the pub key to the permitted hosts and adds the hostkey to its own known hosts. Args: node: the name of this host as a fqdn """ priv_key, pub_key, auth_keys = ssh.GetUserFiles(constants.GANETI_RUNAS) for name in priv_key, pub_key: if os.path.exists(name): utils.CreateBackup(name) utils.RemoveFile(name) result = utils.RunCmd(["ssh-keygen", "-t", "dsa", "-f", priv_key, "-q", "-N", ""]) if result.failed: raise errors.OpExecError("Could not generate ssh keypair, error %s" % result.output) f = open(pub_key, 'r') try: utils.AddAuthorizedKey(auth_keys, f.read(8192)) finally: f.close() def _InitGanetiServerSetup(ss): """Setup the necessary configuration for the initial node daemon. This creates the nodepass file containing the shared password for the cluster and also generates the SSL certificate. """ # Create pseudo random password randpass = sha.new(os.urandom(64)).hexdigest() # and write it into sstore ss.SetKey(ss.SS_NODED_PASS, randpass) result = utils.RunCmd(["openssl", "req", "-new", "-newkey", "rsa:1024", "-days", str(365*5), "-nodes", "-x509", "-keyout", constants.SSL_CERT_FILE, "-out", constants.SSL_CERT_FILE, "-batch"]) if result.failed: raise errors.OpExecError("could not generate server ssl cert, command" " %s had exitcode %s and error message %s" % (result.cmd, result.exit_code, result.output)) os.chmod(constants.SSL_CERT_FILE, 0400) result = utils.RunCmd([constants.NODE_INITD_SCRIPT, "restart"]) if result.failed: raise errors.OpExecError("Could not start the node daemon, command %s" " had exitcode %s and error %s" % (result.cmd, result.exit_code, result.output)) def _CheckInstanceBridgesExist(instance): """Check that the brigdes needed by an instance exist. """ # check bridges existance brlist = [nic.bridge for nic in instance.nics] if not rpc.call_bridges_exist(instance.primary_node, brlist): raise errors.OpPrereqError("one or more target bridges %s does not" " exist on destination node '%s'" % (brlist, instance.primary_node)) class LUInitCluster(LogicalUnit): """Initialise the cluster. """ HPATH = "cluster-init" HTYPE = constants.HTYPE_CLUSTER _OP_REQP = ["cluster_name", "hypervisor_type", "mac_prefix", "def_bridge", "master_netdev", "file_storage_dir"] REQ_CLUSTER = False def BuildHooksEnv(self): """Build hooks env. Notes: Since we don't require a cluster, we must manually add ourselves in the post-run node list. """ env = {"OP_TARGET": self.op.cluster_name} return env, [], [self.hostname.name] def CheckPrereq(self): """Verify that the passed name is a valid one. """ if config.ConfigWriter.IsCluster(): raise errors.OpPrereqError("Cluster is already initialised") if self.op.hypervisor_type == constants.HT_XEN_HVM31: if not os.path.exists(constants.VNC_PASSWORD_FILE): raise errors.OpPrereqError("Please prepare the cluster VNC" "password file %s" % constants.VNC_PASSWORD_FILE) self.hostname = hostname = utils.HostInfo() if hostname.ip.startswith("127."): raise errors.OpPrereqError("This host's IP resolves to the private" " range (%s). Please fix DNS or %s." % (hostname.ip, constants.ETC_HOSTS)) if not utils.TcpPing(hostname.ip, constants.DEFAULT_NODED_PORT, source=constants.LOCALHOST_IP_ADDRESS): raise errors.OpPrereqError("Inconsistency: this host's name resolves" " to %s,\nbut this ip address does not" " belong to this host." " Aborting." % hostname.ip) self.clustername = clustername = utils.HostInfo(self.op.cluster_name) if utils.TcpPing(clustername.ip, constants.DEFAULT_NODED_PORT, timeout=5): raise errors.OpPrereqError("Cluster IP already active. Aborting.") secondary_ip = getattr(self.op, "secondary_ip", None) if secondary_ip and not utils.IsValidIP(secondary_ip): raise errors.OpPrereqError("Invalid secondary ip given") if (secondary_ip and secondary_ip != hostname.ip and (not utils.TcpPing(secondary_ip, constants.DEFAULT_NODED_PORT, source=constants.LOCALHOST_IP_ADDRESS))): raise errors.OpPrereqError("You gave %s as secondary IP," " but it does not belong to this host." % secondary_ip) self.secondary_ip = secondary_ip if not hasattr(self.op, "vg_name"): self.op.vg_name = None # if vg_name not None, checks if volume group is valid if self.op.vg_name: vgstatus = _HasValidVG(utils.ListVolumeGroups(), self.op.vg_name) if vgstatus: raise errors.OpPrereqError("Error: %s\nspecify --no-lvm-storage if" " you are not using lvm" % vgstatus) self.op.file_storage_dir = os.path.normpath(self.op.file_storage_dir) if not os.path.isabs(self.op.file_storage_dir): raise errors.OpPrereqError("The file storage directory you have is" " not an absolute path.") if not os.path.exists(self.op.file_storage_dir): try: os.makedirs(self.op.file_storage_dir, 0750) except OSError, err: raise errors.OpPrereqError("Cannot create file storage directory" " '%s': %s" % (self.op.file_storage_dir, err)) if not os.path.isdir(self.op.file_storage_dir): raise errors.OpPrereqError("The file storage directory '%s' is not" " a directory." % self.op.file_storage_dir) if not re.match("^[0-9a-z]{2}:[0-9a-z]{2}:[0-9a-z]{2}$", self.op.mac_prefix): raise errors.OpPrereqError("Invalid mac prefix given '%s'" % self.op.mac_prefix) if self.op.hypervisor_type not in constants.HYPER_TYPES: raise errors.OpPrereqError("Invalid hypervisor type given '%s'" % self.op.hypervisor_type) result = utils.RunCmd(["ip", "link", "show", "dev", self.op.master_netdev]) if result.failed: raise errors.OpPrereqError("Invalid master netdev given (%s): '%s'" % (self.op.master_netdev, result.output.strip())) if not (os.path.isfile(constants.NODE_INITD_SCRIPT) and os.access(constants.NODE_INITD_SCRIPT, os.X_OK)): raise errors.OpPrereqError("Init.d script '%s' missing or not" " executable." % constants.NODE_INITD_SCRIPT) def Exec(self, feedback_fn): """Initialize the cluster. """ clustername = self.clustername hostname = self.hostname # set up the simple store self.sstore = ss = ssconf.SimpleStore() ss.SetKey(ss.SS_HYPERVISOR, self.op.hypervisor_type) ss.SetKey(ss.SS_MASTER_NODE, hostname.name) ss.SetKey(ss.SS_MASTER_IP, clustername.ip) ss.SetKey(ss.SS_MASTER_NETDEV, self.op.master_netdev) ss.SetKey(ss.SS_CLUSTER_NAME, clustername.name) ss.SetKey(ss.SS_FILE_STORAGE_DIR, self.op.file_storage_dir) # set up the inter-node password and certificate _InitGanetiServerSetup(ss) # start the master ip rpc.call_node_start_master(hostname.name) # set up ssh config and /etc/hosts f = open(constants.SSH_HOST_RSA_PUB, 'r') try: sshline = f.read() finally: f.close() sshkey = sshline.split(" ")[1] _AddHostToEtcHosts(hostname.name) _InitSSHSetup(hostname.name) # init of cluster config file self.cfg = cfgw = config.ConfigWriter() cfgw.InitConfig(hostname.name, hostname.ip, self.secondary_ip, sshkey, self.op.mac_prefix, self.op.vg_name, self.op.def_bridge) ssh.WriteKnownHostsFile(cfgw, ss, constants.SSH_KNOWN_HOSTS_FILE) class LUDestroyCluster(NoHooksLU): """Logical unit for destroying the cluster. """ _OP_REQP = [] def CheckPrereq(self): """Check prerequisites. This checks whether the cluster is empty. Any errors are signalled by raising errors.OpPrereqError. """ master = self.sstore.GetMasterNode() nodelist = self.cfg.GetNodeList() if len(nodelist) != 1 or nodelist[0] != master: raise errors.OpPrereqError("There are still %d node(s) in" " this cluster." % (len(nodelist) - 1)) instancelist = self.cfg.GetInstanceList() if instancelist: raise errors.OpPrereqError("There are still %d instance(s) in" " this cluster." % len(instancelist)) def Exec(self, feedback_fn): """Destroys the cluster. """ master = self.sstore.GetMasterNode() if not rpc.call_node_stop_master(master): raise errors.OpExecError("Could not disable the master role") priv_key, pub_key, _ = ssh.GetUserFiles(constants.GANETI_RUNAS) utils.CreateBackup(priv_key) utils.CreateBackup(pub_key) rpc.call_node_leave_cluster(master) class LUVerifyCluster(NoHooksLU): """Verifies the cluster status. """ _OP_REQP = [] def _VerifyNode(self, node, file_list, local_cksum, vglist, node_result, remote_version, feedback_fn): """Run multiple tests against a node. Test list: - compares ganeti version - checks vg existance and size > 20G - checks config file checksum - checks ssh to other nodes Args: node: name of the node to check file_list: required list of files local_cksum: dictionary of local files and their checksums """ # compares ganeti version local_version = constants.PROTOCOL_VERSION if not remote_version: feedback_fn(" - ERROR: connection to %s failed" % (node)) return True if local_version != remote_version: feedback_fn(" - ERROR: sw version mismatch: master %s, node(%s) %s" % (local_version, node, remote_version)) return True # checks vg existance and size > 20G bad = False if not vglist: feedback_fn(" - ERROR: unable to check volume groups on node %s." % (node,)) bad = True else: vgstatus = _HasValidVG(vglist, self.cfg.GetVGName()) if vgstatus: feedback_fn(" - ERROR: %s on node %s" % (vgstatus, node)) bad = True # checks config file checksum # checks ssh to any if 'filelist' not in node_result: bad = True feedback_fn(" - ERROR: node hasn't returned file checksum data") else: remote_cksum = node_result['filelist'] for file_name in file_list: if file_name not in remote_cksum: bad = True feedback_fn(" - ERROR: file '%s' missing" % file_name) elif remote_cksum[file_name] != local_cksum[file_name]: bad = True feedback_fn(" - ERROR: file '%s' has wrong checksum" % file_name) if 'nodelist' not in node_result: bad = True feedback_fn(" - ERROR: node hasn't returned node connectivity data") else: if node_result['nodelist']: bad = True for node in node_result['nodelist']: feedback_fn(" - ERROR: communication with node '%s': %s" % (node, node_result['nodelist'][node])) hyp_result = node_result.get('hypervisor', None) if hyp_result is not None: feedback_fn(" - ERROR: hypervisor verify failure: '%s'" % hyp_result) return bad def _VerifyInstance(self, instance, instanceconfig, node_vol_is, node_instance, feedback_fn): """Verify an instance. This function checks to see if the required block devices are available on the instance's node. """ bad = False node_current = instanceconfig.primary_node node_vol_should = {} instanceconfig.MapLVsByNode(node_vol_should) for node in node_vol_should: for volume in node_vol_should[node]: if node not in node_vol_is or volume not in node_vol_is[node]: feedback_fn(" - ERROR: volume %s missing on node %s" % (volume, node)) bad = True if not instanceconfig.status == 'down': if (node_current not in node_instance or not instance in node_instance[node_current]): feedback_fn(" - ERROR: instance %s not running on node %s" % (instance, node_current)) bad = True for node in node_instance: if (not node == node_current): if instance in node_instance[node]: feedback_fn(" - ERROR: instance %s should not run on node %s" % (instance, node)) bad = True return bad def _VerifyOrphanVolumes(self, node_vol_should, node_vol_is, feedback_fn): """Verify if there are any unknown volumes in the cluster. The .os, .swap and backup volumes are ignored. All other volumes are reported as unknown. """ bad = False for node in node_vol_is: for volume in node_vol_is[node]: if node not in node_vol_should or volume not in node_vol_should[node]: feedback_fn(" - ERROR: volume %s on node %s should not exist" % (volume, node)) bad = True return bad def _VerifyOrphanInstances(self, instancelist, node_instance, feedback_fn): """Verify the list of running instances. This checks what instances are running but unknown to the cluster. """ bad = False for node in node_instance: for runninginstance in node_instance[node]: if runninginstance not in instancelist: feedback_fn(" - ERROR: instance %s on node %s should not exist" % (runninginstance, node)) bad = True return bad def CheckPrereq(self): """Check prerequisites. This has no prerequisites. """ pass def Exec(self, feedback_fn): """Verify integrity of cluster, performing various test on nodes. """ bad = False feedback_fn("* Verifying global settings") for msg in self.cfg.VerifyConfig(): feedback_fn(" - ERROR: %s" % msg) vg_name = self.cfg.GetVGName() nodelist = utils.NiceSort(self.cfg.GetNodeList()) instancelist = utils.NiceSort(self.cfg.GetInstanceList()) i_non_redundant = [] # Non redundant instances node_volume = {} node_instance = {} node_info = {} # FIXME: verify OS list # do local checksums file_names = list(self.sstore.GetFileList()) file_names.append(constants.SSL_CERT_FILE) file_names.append(constants.CLUSTER_CONF_FILE) local_checksums = utils.FingerprintFiles(file_names) feedback_fn("* Gathering data (%d nodes)" % len(nodelist)) all_volumeinfo = rpc.call_volume_list(nodelist, vg_name) all_instanceinfo = rpc.call_instance_list(nodelist) all_vglist = rpc.call_vg_list(nodelist) node_verify_param = { 'filelist': file_names, 'nodelist': nodelist, 'hypervisor': None, } all_nvinfo = rpc.call_node_verify(nodelist, node_verify_param) all_rversion = rpc.call_version(nodelist) all_ninfo = rpc.call_node_info(nodelist, self.cfg.GetVGName()) for node in nodelist: feedback_fn("* Verifying node %s" % node) result = self._VerifyNode(node, file_names, local_checksums, all_vglist[node], all_nvinfo[node], all_rversion[node], feedback_fn) bad = bad or result # node_volume volumeinfo = all_volumeinfo[node] if isinstance(volumeinfo, basestring): feedback_fn(" - ERROR: LVM problem on node %s: %s" % (node, volumeinfo[-400:].encode('string_escape'))) bad = True node_volume[node] = {} elif not isinstance(volumeinfo, dict): feedback_fn(" - ERROR: connection to %s failed" % (node,)) bad = True continue else: node_volume[node] = volumeinfo # node_instance nodeinstance = all_instanceinfo[node] if type(nodeinstance) != list: feedback_fn(" - ERROR: connection to %s failed" % (node,)) bad = True continue node_instance[node] = nodeinstance # node_info nodeinfo = all_ninfo[node] if not isinstance(nodeinfo, dict): feedback_fn(" - ERROR: connection to %s failed" % (node,)) bad = True continue try: node_info[node] = { "mfree": int(nodeinfo['memory_free']), "dfree": int(nodeinfo['vg_free']), "pinst": [], "sinst": [], # dictionary holding all instances this node is secondary for, # grouped by their primary node. Each key is a cluster node, and each # value is a list of instances which have the key as primary and the # current node as secondary. this is handy to calculate N+1 memory # availability if you can only failover from a primary to its # secondary. "sinst-by-pnode": {}, } except ValueError: feedback_fn(" - ERROR: invalid value returned from node %s" % (node,)) bad = True continue node_vol_should = {} for instance in instancelist: feedback_fn("* Verifying instance %s" % instance) inst_config = self.cfg.GetInstanceInfo(instance) result = self._VerifyInstance(instance, inst_config, node_volume, node_instance, feedback_fn) bad = bad or result inst_config.MapLVsByNode(node_vol_should) pnode = inst_config.primary_node if pnode in node_info: node_info[pnode]['pinst'].append(instance) else: feedback_fn(" - ERROR: instance %s, connection to primary node" " %s failed" % (instance, pnode)) bad = True # If the instance is non-redundant we cannot survive losing its primary # node, so we are not N+1 compliant. On the other hand we have no disk # templates with more than one secondary so that situation is not well # supported either. # FIXME: does not support file-backed instances if len(inst_config.secondary_nodes) == 0: i_non_redundant.append(instance) elif len(inst_config.secondary_nodes) > 1: feedback_fn(" - WARNING: multiple secondaries for instance %s" % instance) for snode in inst_config.secondary_nodes: if snode in node_info: node_info[snode]['sinst'].append(instance) if pnode not in node_info[snode]['sinst-by-pnode']: node_info[snode]['sinst-by-pnode'][pnode] = [] node_info[snode]['sinst-by-pnode'][pnode].append(instance) else: feedback_fn(" - ERROR: instance %s, connection to secondary node" " %s failed" % (instance, snode)) feedback_fn("* Verifying orphan volumes") result = self._VerifyOrphanVolumes(node_vol_should, node_volume, feedback_fn) bad = bad or result feedback_fn("* Verifying remaining instances") result = self._VerifyOrphanInstances(instancelist, node_instance, feedback_fn) bad = bad or result return int(bad) class LUVerifyDisks(NoHooksLU): """Verifies the cluster disks status. """ _OP_REQP = [] def CheckPrereq(self): """Check prerequisites. This has no prerequisites. """ pass def Exec(self, feedback_fn): """Verify integrity of cluster disks. """ result = res_nodes, res_nlvm, res_instances, res_missing = [], {}, [], {} vg_name = self.cfg.GetVGName() nodes = utils.NiceSort(self.cfg.GetNodeList()) instances = [self.cfg.GetInstanceInfo(name) for name in self.cfg.GetInstanceList()] nv_dict = {} for inst in instances: inst_lvs = {} if (inst.status != "up" or inst.disk_template not in constants.DTS_NET_MIRROR): continue inst.MapLVsByNode(inst_lvs) # transform { iname: {node: [vol,],},} to {(node, vol): iname} for node, vol_list in inst_lvs.iteritems(): for vol in vol_list: nv_dict[(node, vol)] = inst if not nv_dict: return result node_lvs = rpc.call_volume_list(nodes, vg_name) to_act = set() for node in nodes: # node_volume lvs = node_lvs[node] if isinstance(lvs, basestring): logger.Info("error enumerating LVs on node %s: %s" % (node, lvs)) res_nlvm[node] = lvs elif not isinstance(lvs, dict): logger.Info("connection to node %s failed or invalid data returned" % (node,)) res_nodes.append(node) continue for lv_name, (_, lv_inactive, lv_online) in lvs.iteritems(): inst = nv_dict.pop((node, lv_name), None) if (not lv_online and inst is not None and inst.name not in res_instances): res_instances.append(inst.name) # any leftover items in nv_dict are missing LVs, let's arrange the # data better for key, inst in nv_dict.iteritems(): if inst.name not in res_missing: res_missing[inst.name] = [] res_missing[inst.name].append(key) return result class LURenameCluster(LogicalUnit): """Rename the cluster. """ HPATH = "cluster-rename" HTYPE = constants.HTYPE_CLUSTER _OP_REQP = ["name"] def BuildHooksEnv(self): """Build hooks env. """ env = { "OP_TARGET": self.sstore.GetClusterName(), "NEW_NAME": self.op.name, } mn = self.sstore.GetMasterNode() return env, [mn], [mn] def CheckPrereq(self): """Verify that the passed name is a valid one. """ hostname = utils.HostInfo(self.op.name) new_name = hostname.name self.ip = new_ip = hostname.ip old_name = self.sstore.GetClusterName() old_ip = self.sstore.GetMasterIP() if new_name == old_name and new_ip == old_ip: raise errors.OpPrereqError("Neither the name nor the IP address of the" " cluster has changed") if new_ip != old_ip: result = utils.RunCmd(["fping", "-q", new_ip]) if not result.failed: raise errors.OpPrereqError("The given cluster IP address (%s) is" " reachable on the network. Aborting." % new_ip) self.op.name = new_name def Exec(self, feedback_fn): """Rename the cluster. """ clustername = self.op.name ip = self.ip ss = self.sstore # shutdown the master IP master = ss.GetMasterNode() if not rpc.call_node_stop_master(master): raise errors.OpExecError("Could not disable the master role") try: # modify the sstore ss.SetKey(ss.SS_MASTER_IP, ip) ss.SetKey(ss.SS_CLUSTER_NAME, clustername) # Distribute updated ss config to all nodes myself = self.cfg.GetNodeInfo(master) dist_nodes = self.cfg.GetNodeList() if myself.name in dist_nodes: dist_nodes.remove(myself.name) logger.Debug("Copying updated ssconf data to all nodes") for keyname in [ss.SS_CLUSTER_NAME, ss.SS_MASTER_IP]: fname = ss.KeyToFilename(keyname) result = rpc.call_upload_file(dist_nodes, fname) for to_node in dist_nodes: if not result[to_node]: logger.Error("copy of file %s to node %s failed" % (fname, to_node)) finally: if not rpc.call_node_start_master(master): logger.Error("Could not re-enable the master role on the master," " please restart manually.") def _RecursiveCheckIfLVMBased(disk): """Check if the given disk or its children are lvm-based. Args: disk: ganeti.objects.Disk object Returns: boolean indicating whether a LD_LV dev_type was found or not """ if disk.children: for chdisk in disk.children: if _RecursiveCheckIfLVMBased(chdisk): return True return disk.dev_type == constants.LD_LV class LUSetClusterParams(LogicalUnit): """Change the parameters of the cluster. """ HPATH = "cluster-modify" HTYPE = constants.HTYPE_CLUSTER _OP_REQP = [] def BuildHooksEnv(self): """Build hooks env. """ env = { "OP_TARGET": self.sstore.GetClusterName(), "NEW_VG_NAME": self.op.vg_name, } mn = self.sstore.GetMasterNode() return env, [mn], [mn] def CheckPrereq(self): """Check prerequisites. This checks whether the given params don't conflict and if the given volume group is valid. """ if not self.op.vg_name: instances = [self.cfg.GetInstanceInfo(name) for name in self.cfg.GetInstanceList()] for inst in instances: for disk in inst.disks: if _RecursiveCheckIfLVMBased(disk): raise errors.OpPrereqError("Cannot disable lvm storage while" " lvm-based instances exist") # if vg_name not None, checks given volume group on all nodes if self.op.vg_name: node_list = self.cfg.GetNodeList() vglist = rpc.call_vg_list(node_list) for node in node_list: vgstatus = _HasValidVG(vglist[node], self.op.vg_name) if vgstatus: raise errors.OpPrereqError("Error on node '%s': %s" % (node, vgstatus)) def Exec(self, feedback_fn): """Change the parameters of the cluster. """ if self.op.vg_name != self.cfg.GetVGName(): self.cfg.SetVGName(self.op.vg_name) else: feedback_fn("Cluster LVM configuration already in desired" " state, not changing") def _WaitForSync(cfgw, instance, proc, oneshot=False, unlock=False): """Sleep and poll for an instance's disk to sync. """ if not instance.disks: return True if not oneshot: proc.LogInfo("Waiting for instance %s to sync disks." % instance.name) node = instance.primary_node for dev in instance.disks: cfgw.SetDiskID(dev, node) retries = 0 while True: max_time = 0 done = True cumul_degraded = False rstats = rpc.call_blockdev_getmirrorstatus(node, instance.disks) if not rstats: proc.LogWarning("Can't get any data from node %s" % node) retries += 1 if retries >= 10: raise errors.RemoteError("Can't contact node %s for mirror data," " aborting." % node) time.sleep(6) continue retries = 0 for i in range(len(rstats)): mstat = rstats[i] if mstat is None: proc.LogWarning("Can't compute data for node %s/%s" % (node, instance.disks[i].iv_name)) continue # we ignore the ldisk parameter perc_done, est_time, is_degraded, _ = mstat cumul_degraded = cumul_degraded or (is_degraded and perc_done is None) if perc_done is not None: done = False if est_time is not None: rem_time = "%d estimated seconds remaining" % est_time max_time = est_time else: rem_time = "no time estimate" proc.LogInfo("- device %s: %5.2f%% done, %s" % (instance.disks[i].iv_name, perc_done, rem_time)) if done or oneshot: break if unlock: utils.Unlock('cmd') try: time.sleep(min(60, max_time)) finally: if unlock: utils.Lock('cmd') if done: proc.LogInfo("Instance %s's disks are in sync." % instance.name) return not cumul_degraded def _CheckDiskConsistency(cfgw, dev, node, on_primary, ldisk=False): """Check that mirrors are not degraded. The ldisk parameter, if True, will change the test from the is_degraded attribute (which represents overall non-ok status for the device(s)) to the ldisk (representing the local storage status). """ cfgw.SetDiskID(dev, node) if ldisk: idx = 6 else: idx = 5 result = True if on_primary or dev.AssembleOnSecondary(): rstats = rpc.call_blockdev_find(node, dev) if not rstats: logger.ToStderr("Node %s: Disk degraded, not found or node down" % node) result = False else: result = result and (not rstats[idx]) if dev.children: for child in dev.children: result = result and _CheckDiskConsistency(cfgw, child, node, on_primary) return result class LUDiagnoseOS(NoHooksLU): """Logical unit for OS diagnose/query. """ _OP_REQP = ["output_fields", "names"] def CheckPrereq(self): """Check prerequisites. This always succeeds, since this is a pure query LU. """ if self.op.names: raise errors.OpPrereqError("Selective OS query not supported") self.dynamic_fields = frozenset(["name", "valid", "node_status"]) _CheckOutputFields(static=[], dynamic=self.dynamic_fields, selected=self.op.output_fields) @staticmethod def _DiagnoseByOS(node_list, rlist): """Remaps a per-node return list into an a per-os per-node dictionary Args: node_list: a list with the names of all nodes rlist: a map with node names as keys and OS objects as values Returns: map: a map with osnames as keys and as value another map, with nodes as keys and list of OS objects as values e.g. {"debian-etch": {"node1": [,...], "node2": [,]} } """ all_os = {} for node_name, nr in rlist.iteritems(): if not nr: continue for os in nr: if os.name not in all_os: # build a list of nodes for this os containing empty lists # for each node in node_list all_os[os.name] = {} for nname in node_list: all_os[os.name][nname] = [] all_os[os.name][node_name].append(os) return all_os def Exec(self, feedback_fn): """Compute the list of OSes. """ node_list = self.cfg.GetNodeList() node_data = rpc.call_os_diagnose(node_list) if node_data == False: raise errors.OpExecError("Can't gather the list of OSes") pol = self._DiagnoseByOS(node_list, node_data) output = [] for os_name, os_data in pol.iteritems(): row = [] for field in self.op.output_fields: if field == "name": val = os_name elif field == "valid": val = utils.all([osl and osl[0] for osl in os_data.values()]) elif field == "node_status": val = {} for node_name, nos_list in os_data.iteritems(): val[node_name] = [(v.status, v.path) for v in nos_list] else: raise errors.ParameterError(field) row.append(val) output.append(row) return output class LURemoveNode(LogicalUnit): """Logical unit for removing a node. """ HPATH = "node-remove" HTYPE = constants.HTYPE_NODE _OP_REQP = ["node_name"] def BuildHooksEnv(self): """Build hooks env. This doesn't run on the target node in the pre phase as a failed node would not allows itself to run. """ env = { "OP_TARGET": self.op.node_name, "NODE_NAME": self.op.node_name, } all_nodes = self.cfg.GetNodeList() all_nodes.remove(self.op.node_name) return env, all_nodes, all_nodes def CheckPrereq(self): """Check prerequisites. This checks: - the node exists in the configuration - it does not have primary or secondary instances - it's not the master Any errors are signalled by raising errors.OpPrereqError. """ node = self.cfg.GetNodeInfo(self.cfg.ExpandNodeName(self.op.node_name)) if node is None: raise errors.OpPrereqError, ("Node '%s' is unknown." % self.op.node_name) instance_list = self.cfg.GetInstanceList() masternode = self.sstore.GetMasterNode() if node.name == masternode: raise errors.OpPrereqError("Node is the master node," " you need to failover first.") for instance_name in instance_list: instance = self.cfg.GetInstanceInfo(instance_name) if node.name == instance.primary_node: raise errors.OpPrereqError("Instance %s still running on the node," " please remove first." % instance_name) if node.name in instance.secondary_nodes: raise errors.OpPrereqError("Instance %s has node as a secondary," " please remove first." % instance_name) self.op.node_name = node.name self.node = node def Exec(self, feedback_fn): """Removes the node from the cluster. """ node = self.node logger.Info("stopping the node daemon and removing configs from node %s" % node.name) rpc.call_node_leave_cluster(node.name) self.ssh.Run(node.name, 'root', "%s stop" % constants.NODE_INITD_SCRIPT) logger.Info("Removing node %s from config" % node.name) self.cfg.RemoveNode(node.name) _RemoveHostFromEtcHosts(node.name) class LUQueryNodes(NoHooksLU): """Logical unit for querying nodes. """ _OP_REQP = ["output_fields", "names"] def CheckPrereq(self): """Check prerequisites. This checks that the fields required are valid output fields. """ self.dynamic_fields = frozenset(["dtotal", "dfree", "mtotal", "mnode", "mfree", "bootid"]) _CheckOutputFields(static=["name", "pinst_cnt", "sinst_cnt", "pinst_list", "sinst_list", "pip", "sip"], dynamic=self.dynamic_fields, selected=self.op.output_fields) self.wanted = _GetWantedNodes(self, self.op.names) def Exec(self, feedback_fn): """Computes the list of nodes and their attributes. """ nodenames = self.wanted nodelist = [self.cfg.GetNodeInfo(name) for name in nodenames] # begin data gathering if self.dynamic_fields.intersection(self.op.output_fields): live_data = {} node_data = rpc.call_node_info(nodenames, self.cfg.GetVGName()) for name in nodenames: nodeinfo = node_data.get(name, None) if nodeinfo: live_data[name] = { "mtotal": utils.TryConvert(int, nodeinfo['memory_total']), "mnode": utils.TryConvert(int, nodeinfo['memory_dom0']), "mfree": utils.TryConvert(int, nodeinfo['memory_free']), "dtotal": utils.TryConvert(int, nodeinfo['vg_size']), "dfree": utils.TryConvert(int, nodeinfo['vg_free']), "bootid": nodeinfo['bootid'], } else: live_data[name] = {} else: live_data = dict.fromkeys(nodenames, {}) node_to_primary = dict([(name, set()) for name in nodenames]) node_to_secondary = dict([(name, set()) for name in nodenames]) inst_fields = frozenset(("pinst_cnt", "pinst_list", "sinst_cnt", "sinst_list")) if inst_fields & frozenset(self.op.output_fields): instancelist = self.cfg.GetInstanceList() for instance_name in instancelist: inst = self.cfg.GetInstanceInfo(instance_name) if inst.primary_node in node_to_primary: node_to_primary[inst.primary_node].add(inst.name) for secnode in inst.secondary_nodes: if secnode in node_to_secondary: node_to_secondary[secnode].add(inst.name) # end data gathering output = [] for node in nodelist: node_output = [] for field in self.op.output_fields: if field == "name": val = node.name elif field == "pinst_list": val = list(node_to_primary[node.name]) elif field == "sinst_list": val = list(node_to_secondary[node.name]) elif field == "pinst_cnt": val = len(node_to_primary[node.name]) elif field == "sinst_cnt": val = len(node_to_secondary[node.name]) elif field == "pip": val = node.primary_ip elif field == "sip": val = node.secondary_ip elif field in self.dynamic_fields: val = live_data[node.name].get(field, None) else: raise errors.ParameterError(field) node_output.append(val) output.append(node_output) return output class LUQueryNodeVolumes(NoHooksLU): """Logical unit for getting volumes on node(s). """ _OP_REQP = ["nodes", "output_fields"] def CheckPrereq(self): """Check prerequisites. This checks that the fields required are valid output fields. """ self.nodes = _GetWantedNodes(self, self.op.nodes) _CheckOutputFields(static=["node"], dynamic=["phys", "vg", "name", "size", "instance"], selected=self.op.output_fields) def Exec(self, feedback_fn): """Computes the list of nodes and their attributes. """ nodenames = self.nodes volumes = rpc.call_node_volumes(nodenames) ilist = [self.cfg.GetInstanceInfo(iname) for iname in self.cfg.GetInstanceList()] lv_by_node = dict([(inst, inst.MapLVsByNode()) for inst in ilist]) output = [] for node in nodenames: if node not in volumes or not volumes[node]: continue node_vols = volumes[node][:] node_vols.sort(key=lambda vol: vol['dev']) for vol in node_vols: node_output = [] for field in self.op.output_fields: if field == "node": val = node elif field == "phys": val = vol['dev'] elif field == "vg": val = vol['vg'] elif field == "name": val = vol['name'] elif field == "size": val = int(float(vol['size'])) elif field == "instance": for inst in ilist: if node not in lv_by_node[inst]: continue if vol['name'] in lv_by_node[inst][node]: val = inst.name break else: val = '-' else: raise errors.ParameterError(field) node_output.append(str(val)) output.append(node_output) return output class LUAddNode(LogicalUnit): """Logical unit for adding node to the cluster. """ HPATH = "node-add" HTYPE = constants.HTYPE_NODE _OP_REQP = ["node_name"] def BuildHooksEnv(self): """Build hooks env. This will run on all nodes before, and on all nodes + the new node after. """ env = { "OP_TARGET": self.op.node_name, "NODE_NAME": self.op.node_name, "NODE_PIP": self.op.primary_ip, "NODE_SIP": self.op.secondary_ip, } nodes_0 = self.cfg.GetNodeList() nodes_1 = nodes_0 + [self.op.node_name, ] return env, nodes_0, nodes_1 def CheckPrereq(self): """Check prerequisites. This checks: - the new node is not already in the config - it is resolvable - its parameters (single/dual homed) matches the cluster Any errors are signalled by raising errors.OpPrereqError. """ node_name = self.op.node_name cfg = self.cfg dns_data = utils.HostInfo(node_name) node = dns_data.name primary_ip = self.op.primary_ip = dns_data.ip secondary_ip = getattr(self.op, "secondary_ip", None) if secondary_ip is None: secondary_ip = primary_ip if not utils.IsValidIP(secondary_ip): raise errors.OpPrereqError("Invalid secondary IP given") self.op.secondary_ip = secondary_ip node_list = cfg.GetNodeList() if node in node_list: raise errors.OpPrereqError("Node %s is already in the configuration" % node) for existing_node_name in node_list: existing_node = cfg.GetNodeInfo(existing_node_name) if (existing_node.primary_ip == primary_ip or existing_node.secondary_ip == primary_ip or existing_node.primary_ip == secondary_ip or existing_node.secondary_ip == secondary_ip): raise errors.OpPrereqError("New node ip address(es) conflict with" " existing node %s" % existing_node.name) # check that the type of the node (single versus dual homed) is the # same as for the master myself = cfg.GetNodeInfo(self.sstore.GetMasterNode()) master_singlehomed = myself.secondary_ip == myself.primary_ip newbie_singlehomed = secondary_ip == primary_ip if master_singlehomed != newbie_singlehomed: if master_singlehomed: raise errors.OpPrereqError("The master has no private ip but the" " new node has one") else: raise errors.OpPrereqError("The master has a private ip but the" " new node doesn't have one") # checks reachablity if not utils.TcpPing(primary_ip, constants.DEFAULT_NODED_PORT): raise errors.OpPrereqError("Node not reachable by ping") if not newbie_singlehomed: # check reachability from my secondary ip to newbie's secondary ip if not utils.TcpPing(secondary_ip, constants.DEFAULT_NODED_PORT, source=myself.secondary_ip): raise errors.OpPrereqError("Node secondary ip not reachable by TCP" " based ping to noded port") self.new_node = objects.Node(name=node, primary_ip=primary_ip, secondary_ip=secondary_ip) if self.sstore.GetHypervisorType() == constants.HT_XEN_HVM31: if not os.path.exists(constants.VNC_PASSWORD_FILE): raise errors.OpPrereqError("Cluster VNC password file %s missing" % constants.VNC_PASSWORD_FILE) def Exec(self, feedback_fn): """Adds the new node to the cluster. """ new_node = self.new_node node = new_node.name # set up inter-node password and certificate and restarts the node daemon gntpass = self.sstore.GetNodeDaemonPassword() if not re.match('^[a-zA-Z0-9.]{1,64}$', gntpass): raise errors.OpExecError("ganeti password corruption detected") f = open(constants.SSL_CERT_FILE) try: gntpem = f.read(8192) finally: f.close() # in the base64 pem encoding, neither '!' nor '.' are valid chars, # so we use this to detect an invalid certificate; as long as the # cert doesn't contain this, the here-document will be correctly # parsed by the shell sequence below if re.search('^!EOF\.', gntpem, re.MULTILINE): raise errors.OpExecError("invalid PEM encoding in the SSL certificate") if not gntpem.endswith("\n"): raise errors.OpExecError("PEM must end with newline") logger.Info("copy cluster pass to %s and starting the node daemon" % node) # and then connect with ssh to set password and start ganeti-noded # note that all the below variables are sanitized at this point, # either by being constants or by the checks above ss = self.sstore mycommand = ("umask 077 && " "echo '%s' > '%s' && " "cat > '%s' << '!EOF.' && \n" "%s!EOF.\n%s restart" % (gntpass, ss.KeyToFilename(ss.SS_NODED_PASS), constants.SSL_CERT_FILE, gntpem, constants.NODE_INITD_SCRIPT)) result = self.ssh.Run(node, 'root', mycommand, batch=False, ask_key=True) if result.failed: raise errors.OpExecError("Remote command on node %s, error: %s," " output: %s" % (node, result.fail_reason, result.output)) # check connectivity time.sleep(4) result = rpc.call_version([node])[node] if result: if constants.PROTOCOL_VERSION == result: logger.Info("communication to node %s fine, sw version %s match" % (node, result)) else: raise errors.OpExecError("Version mismatch master version %s," " node version %s" % (constants.PROTOCOL_VERSION, result)) else: raise errors.OpExecError("Cannot get version from the new node") # setup ssh on node logger.Info("copy ssh key to node %s" % node) priv_key, pub_key, _ = ssh.GetUserFiles(constants.GANETI_RUNAS) keyarray = [] keyfiles = [constants.SSH_HOST_DSA_PRIV, constants.SSH_HOST_DSA_PUB, constants.SSH_HOST_RSA_PRIV, constants.SSH_HOST_RSA_PUB, priv_key, pub_key] for i in keyfiles: f = open(i, 'r') try: keyarray.append(f.read()) finally: f.close() result = rpc.call_node_add(node, keyarray[0], keyarray[1], keyarray[2], keyarray[3], keyarray[4], keyarray[5]) if not result: raise errors.OpExecError("Cannot transfer ssh keys to the new node") # Add node to our /etc/hosts, and add key to known_hosts _AddHostToEtcHosts(new_node.name) if new_node.secondary_ip != new_node.primary_ip: if not rpc.call_node_tcp_ping(new_node.name, constants.LOCALHOST_IP_ADDRESS, new_node.secondary_ip, constants.DEFAULT_NODED_PORT, 10, False): raise errors.OpExecError("Node claims it doesn't have the secondary ip" " you gave (%s). Please fix and re-run this" " command." % new_node.secondary_ip) success, msg = self.ssh.VerifyNodeHostname(node) if not success: raise errors.OpExecError("Node '%s' claims it has a different hostname" " than the one the resolver gives: %s." " Please fix and re-run this command." % (node, msg)) # Distribute updated /etc/hosts and known_hosts to all nodes, # including the node just added myself = self.cfg.GetNodeInfo(self.sstore.GetMasterNode()) dist_nodes = self.cfg.GetNodeList() + [node] if myself.name in dist_nodes: dist_nodes.remove(myself.name) logger.Debug("Copying hosts and known_hosts to all nodes") for fname in (constants.ETC_HOSTS, constants.SSH_KNOWN_HOSTS_FILE): result = rpc.call_upload_file(dist_nodes, fname) for to_node in dist_nodes: if not result[to_node]: logger.Error("copy of file %s to node %s failed" % (fname, to_node)) to_copy = ss.GetFileList() if self.sstore.GetHypervisorType() == constants.HT_XEN_HVM31: to_copy.append(constants.VNC_PASSWORD_FILE) for fname in to_copy: if not self.ssh.CopyFileToNode(node, fname): logger.Error("could not copy file %s to node %s" % (fname, node)) logger.Info("adding node %s to cluster.conf" % node) self.cfg.AddNode(new_node) class LUMasterFailover(LogicalUnit): """Failover the master node to the current node. This is a special LU in that it must run on a non-master node. """ HPATH = "master-failover" HTYPE = constants.HTYPE_CLUSTER REQ_MASTER = False _OP_REQP = [] def BuildHooksEnv(self): """Build hooks env. This will run on the new master only in the pre phase, and on all the nodes in the post phase. """ env = { "OP_TARGET": self.new_master, "NEW_MASTER": self.new_master, "OLD_MASTER": self.old_master, } return env, [self.new_master], self.cfg.GetNodeList() def CheckPrereq(self): """Check prerequisites. This checks that we are not already the master. """ self.new_master = utils.HostInfo().name self.old_master = self.sstore.GetMasterNode() if self.old_master == self.new_master: raise errors.OpPrereqError("This commands must be run on the node" " where you want the new master to be." " %s is already the master" % self.old_master) def Exec(self, feedback_fn): """Failover the master node. This command, when run on a non-master node, will cause the current master to cease being master, and the non-master to become new master. """ #TODO: do not rely on gethostname returning the FQDN logger.Info("setting master to %s, old master: %s" % (self.new_master, self.old_master)) if not rpc.call_node_stop_master(self.old_master): logger.Error("could disable the master role on the old master" " %s, please disable manually" % self.old_master) ss = self.sstore ss.SetKey(ss.SS_MASTER_NODE, self.new_master) if not rpc.call_upload_file(self.cfg.GetNodeList(), ss.KeyToFilename(ss.SS_MASTER_NODE)): logger.Error("could not distribute the new simple store master file" " to the other nodes, please check.") if not rpc.call_node_start_master(self.new_master): logger.Error("could not start the master role on the new master" " %s, please check" % self.new_master) feedback_fn("Error in activating the master IP on the new master," " please fix manually.") class LUQueryClusterInfo(NoHooksLU): """Query cluster configuration. """ _OP_REQP = [] REQ_MASTER = False def CheckPrereq(self): """No prerequsites needed for this LU. """ pass def Exec(self, feedback_fn): """Return cluster config. """ result = { "name": self.sstore.GetClusterName(), "software_version": constants.RELEASE_VERSION, "protocol_version": constants.PROTOCOL_VERSION, "config_version": constants.CONFIG_VERSION, "os_api_version": constants.OS_API_VERSION, "export_version": constants.EXPORT_VERSION, "master": self.sstore.GetMasterNode(), "architecture": (platform.architecture()[0], platform.machine()), } return result class LUClusterCopyFile(NoHooksLU): """Copy file to cluster. """ _OP_REQP = ["nodes", "filename"] def CheckPrereq(self): """Check prerequisites. It should check that the named file exists and that the given list of nodes is valid. """ if not os.path.exists(self.op.filename): raise errors.OpPrereqError("No such filename '%s'" % self.op.filename) self.nodes = _GetWantedNodes(self, self.op.nodes) def Exec(self, feedback_fn): """Copy a file from master to some nodes. Args: opts - class with options as members args - list containing a single element, the file name Opts used: nodes - list containing the name of target nodes; if empty, all nodes """ filename = self.op.filename myname = utils.HostInfo().name for node in self.nodes: if node == myname: continue if not self.ssh.CopyFileToNode(node, filename): logger.Error("Copy of file %s to node %s failed" % (filename, node)) class LUDumpClusterConfig(NoHooksLU): """Return a text-representation of the cluster-config. """ _OP_REQP = [] def CheckPrereq(self): """No prerequisites. """ pass def Exec(self, feedback_fn): """Dump a representation of the cluster config to the standard output. """ return self.cfg.DumpConfig() class LURunClusterCommand(NoHooksLU): """Run a command on some nodes. """ _OP_REQP = ["command", "nodes"] def CheckPrereq(self): """Check prerequisites. It checks that the given list of nodes is valid. """ self.nodes = _GetWantedNodes(self, self.op.nodes) def Exec(self, feedback_fn): """Run a command on some nodes. """ # put the master at the end of the nodes list master_node = self.sstore.GetMasterNode() if master_node in self.nodes: self.nodes.remove(master_node) self.nodes.append(master_node) data = [] for node in self.nodes: result = self.ssh.Run(node, "root", self.op.command) data.append((node, result.output, result.exit_code)) return data class LUActivateInstanceDisks(NoHooksLU): """Bring up an instance's disks. """ _OP_REQP = ["instance_name"] def CheckPrereq(self): """Check prerequisites. This checks that the instance is in the cluster. """ instance = self.cfg.GetInstanceInfo( self.cfg.ExpandInstanceName(self.op.instance_name)) if instance is None: raise errors.OpPrereqError("Instance '%s' not known" % self.op.instance_name) self.instance = instance def Exec(self, feedback_fn): """Activate the disks. """ disks_ok, disks_info = _AssembleInstanceDisks(self.instance, self.cfg) if not disks_ok: raise errors.OpExecError("Cannot activate block devices") return disks_info def _AssembleInstanceDisks(instance, cfg, ignore_secondaries=False): """Prepare the block devices for an instance. This sets up the block devices on all nodes. Args: instance: a ganeti.objects.Instance object ignore_secondaries: if true, errors on secondary nodes won't result in an error return from the function Returns: false if the operation failed list of (host, instance_visible_name, node_visible_name) if the operation suceeded with the mapping from node devices to instance devices """ device_info = [] disks_ok = True iname = instance.name # With the two passes mechanism we try to reduce the window of # opportunity for the race condition of switching DRBD to primary # before handshaking occured, but we do not eliminate it # The proper fix would be to wait (with some limits) until the # connection has been made and drbd transitions from WFConnection # into any other network-connected state (Connected, SyncTarget, # SyncSource, etc.) # 1st pass, assemble on all nodes in secondary mode for inst_disk in instance.disks: for node, node_disk in inst_disk.ComputeNodeTree(instance.primary_node): cfg.SetDiskID(node_disk, node) result = rpc.call_blockdev_assemble(node, node_disk, iname, False) if not result: logger.Error("could not prepare block device %s on node %s" " (is_primary=False, pass=1)" % (inst_disk.iv_name, node)) if not ignore_secondaries: disks_ok = False # FIXME: race condition on drbd migration to primary # 2nd pass, do only the primary node for inst_disk in instance.disks: for node, node_disk in inst_disk.ComputeNodeTree(instance.primary_node): if node != instance.primary_node: continue cfg.SetDiskID(node_disk, node) result = rpc.call_blockdev_assemble(node, node_disk, iname, True) if not result: logger.Error("could not prepare block device %s on node %s" " (is_primary=True, pass=2)" % (inst_disk.iv_name, node)) disks_ok = False device_info.append((instance.primary_node, inst_disk.iv_name, result)) # leave the disks configured for the primary node # this is a workaround that would be fixed better by # improving the logical/physical id handling for disk in instance.disks: cfg.SetDiskID(disk, instance.primary_node) return disks_ok, device_info def _StartInstanceDisks(cfg, instance, force): """Start the disks of an instance. """ disks_ok, dummy = _AssembleInstanceDisks(instance, cfg, ignore_secondaries=force) if not disks_ok: _ShutdownInstanceDisks(instance, cfg) if force is not None and not force: logger.Error("If the message above refers to a secondary node," " you can retry the operation using '--force'.") raise errors.OpExecError("Disk consistency error") class LUDeactivateInstanceDisks(NoHooksLU): """Shutdown an instance's disks. """ _OP_REQP = ["instance_name"] def CheckPrereq(self): """Check prerequisites. This checks that the instance is in the cluster. """ instance = self.cfg.GetInstanceInfo( self.cfg.ExpandInstanceName(self.op.instance_name)) if instance is None: raise errors.OpPrereqError("Instance '%s' not known" % self.op.instance_name) self.instance = instance def Exec(self, feedback_fn): """Deactivate the disks """ instance = self.instance ins_l = rpc.call_instance_list([instance.primary_node]) ins_l = ins_l[instance.primary_node] if not type(ins_l) is list: raise errors.OpExecError("Can't contact node '%s'" % instance.primary_node) if self.instance.name in ins_l: raise errors.OpExecError("Instance is running, can't shutdown" " block devices.") _ShutdownInstanceDisks(instance, self.cfg) def _ShutdownInstanceDisks(instance, cfg, ignore_primary=False): """Shutdown block devices of an instance. This does the shutdown on all nodes of the instance. If the ignore_primary is false, errors on the primary node are ignored. """ result = True for disk in instance.disks: for node, top_disk in disk.ComputeNodeTree(instance.primary_node): cfg.SetDiskID(top_disk, node) if not rpc.call_blockdev_shutdown(node, top_disk): logger.Error("could not shutdown block device %s on node %s" % (disk.iv_name, node)) if not ignore_primary or node != instance.primary_node: result = False return result def _CheckNodeFreeMemory(cfg, node, reason, requested): """Checks if a node has enough free memory. This function check if a given node has the needed amount of free memory. In case the node has less memory or we cannot get the information from the node, this function raise an OpPrereqError exception. Args: - cfg: a ConfigWriter instance - node: the node name - reason: string to use in the error message - requested: the amount of memory in MiB """ nodeinfo = rpc.call_node_info([node], cfg.GetVGName()) if not nodeinfo or not isinstance(nodeinfo, dict): raise errors.OpPrereqError("Could not contact node %s for resource" " information" % (node,)) free_mem = nodeinfo[node].get('memory_free') if not isinstance(free_mem, int): raise errors.OpPrereqError("Can't compute free memory on node %s, result" " was '%s'" % (node, free_mem)) if requested > free_mem: raise errors.OpPrereqError("Not enough memory on node %s for %s:" " needed %s MiB, available %s MiB" % (node, reason, requested, free_mem)) class LUStartupInstance(LogicalUnit): """Starts an instance. """ HPATH = "instance-start" HTYPE = constants.HTYPE_INSTANCE _OP_REQP = ["instance_name", "force"] def BuildHooksEnv(self): """Build hooks env. This runs on master, primary and secondary nodes of the instance. """ env = { "FORCE": self.op.force, } env.update(_BuildInstanceHookEnvByObject(self.instance)) nl = ([self.sstore.GetMasterNode(), self.instance.primary_node] + list(self.instance.secondary_nodes)) return env, nl, nl def CheckPrereq(self): """Check prerequisites. This checks that the instance is in the cluster. """ instance = self.cfg.GetInstanceInfo( self.cfg.ExpandInstanceName(self.op.instance_name)) if instance is None: raise errors.OpPrereqError("Instance '%s' not known" % self.op.instance_name) # check bridges existance _CheckInstanceBridgesExist(instance) _CheckNodeFreeMemory(self.cfg, instance.primary_node, "starting instance %s" % instance.name, instance.memory) self.instance = instance self.op.instance_name = instance.name def Exec(self, feedback_fn): """Start the instance. """ instance = self.instance force = self.op.force extra_args = getattr(self.op, "extra_args", "") self.cfg.MarkInstanceUp(instance.name) node_current = instance.primary_node _StartInstanceDisks(self.cfg, instance, force) if not rpc.call_instance_start(node_current, instance, extra_args): _ShutdownInstanceDisks(instance, self.cfg) raise errors.OpExecError("Could not start instance") class LURebootInstance(LogicalUnit): """Reboot an instance. """ HPATH = "instance-reboot" HTYPE = constants.HTYPE_INSTANCE _OP_REQP = ["instance_name", "ignore_secondaries", "reboot_type"] def BuildHooksEnv(self): """Build hooks env. This runs on master, primary and secondary nodes of the instance. """ env = { "IGNORE_SECONDARIES": self.op.ignore_secondaries, } env.update(_BuildInstanceHookEnvByObject(self.instance)) nl = ([self.sstore.GetMasterNode(), self.instance.primary_node] + list(self.instance.secondary_nodes)) return env, nl, nl def CheckPrereq(self): """Check prerequisites. This checks that the instance is in the cluster. """ instance = self.cfg.GetInstanceInfo( self.cfg.ExpandInstanceName(self.op.instance_name)) if instance is None: raise errors.OpPrereqError("Instance '%s' not known" % self.op.instance_name) # check bridges existance _CheckInstanceBridgesExist(instance) self.instance = instance self.op.instance_name = instance.name def Exec(self, feedback_fn): """Reboot the instance. """ instance = self.instance ignore_secondaries = self.op.ignore_secondaries reboot_type = self.op.reboot_type extra_args = getattr(self.op, "extra_args", "") node_current = instance.primary_node if reboot_type not in [constants.INSTANCE_REBOOT_SOFT, constants.INSTANCE_REBOOT_HARD, constants.INSTANCE_REBOOT_FULL]: raise errors.ParameterError("reboot type not in [%s, %s, %s]" % (constants.INSTANCE_REBOOT_SOFT, constants.INSTANCE_REBOOT_HARD, constants.INSTANCE_REBOOT_FULL)) if reboot_type in [constants.INSTANCE_REBOOT_SOFT, constants.INSTANCE_REBOOT_HARD]: if not rpc.call_instance_reboot(node_current, instance, reboot_type, extra_args): raise errors.OpExecError("Could not reboot instance") else: if not rpc.call_instance_shutdown(node_current, instance): raise errors.OpExecError("could not shutdown instance for full reboot") _ShutdownInstanceDisks(instance, self.cfg) _StartInstanceDisks(self.cfg, instance, ignore_secondaries) if not rpc.call_instance_start(node_current, instance, extra_args): _ShutdownInstanceDisks(instance, self.cfg) raise errors.OpExecError("Could not start instance for full reboot") self.cfg.MarkInstanceUp(instance.name) class LUShutdownInstance(LogicalUnit): """Shutdown an instance. """ HPATH = "instance-stop" HTYPE = constants.HTYPE_INSTANCE _OP_REQP = ["instance_name"] def BuildHooksEnv(self): """Build hooks env. This runs on master, primary and secondary nodes of the instance. """ env = _BuildInstanceHookEnvByObject(self.instance) nl = ([self.sstore.GetMasterNode(), self.instance.primary_node] + list(self.instance.secondary_nodes)) return env, nl, nl def CheckPrereq(self): """Check prerequisites. This checks that the instance is in the cluster. """ instance = self.cfg.GetInstanceInfo( self.cfg.ExpandInstanceName(self.op.instance_name)) if instance is None: raise errors.OpPrereqError("Instance '%s' not known" % self.op.instance_name) self.instance = instance def Exec(self, feedback_fn): """Shutdown the instance. """ instance = self.instance node_current = instance.primary_node self.cfg.MarkInstanceDown(instance.name) if not rpc.call_instance_shutdown(node_current, instance): logger.Error("could not shutdown instance") _ShutdownInstanceDisks(instance, self.cfg) class LUReinstallInstance(LogicalUnit): """Reinstall an instance. """ HPATH = "instance-reinstall" HTYPE = constants.HTYPE_INSTANCE _OP_REQP = ["instance_name"] def BuildHooksEnv(self): """Build hooks env. This runs on master, primary and secondary nodes of the instance. """ env = _BuildInstanceHookEnvByObject(self.instance) nl = ([self.sstore.GetMasterNode(), self.instance.primary_node] + list(self.instance.secondary_nodes)) return env, nl, nl def CheckPrereq(self): """Check prerequisites. This checks that the instance is in the cluster and is not running. """ instance = self.cfg.GetInstanceInfo( self.cfg.ExpandInstanceName(self.op.instance_name)) if instance is None: raise errors.OpPrereqError("Instance '%s' not known" % self.op.instance_name) if instance.disk_template == constants.DT_DISKLESS: raise errors.OpPrereqError("Instance '%s' has no disks" % self.op.instance_name) if instance.status != "down": raise errors.OpPrereqError("Instance '%s' is marked to be up" % self.op.instance_name) remote_info = rpc.call_instance_info(instance.primary_node, instance.name) if remote_info: raise errors.OpPrereqError("Instance '%s' is running on the node %s" % (self.op.instance_name, instance.primary_node)) self.op.os_type = getattr(self.op, "os_type", None) if self.op.os_type is not None: # OS verification pnode = self.cfg.GetNodeInfo( self.cfg.ExpandNodeName(instance.primary_node)) if pnode is None: raise errors.OpPrereqError("Primary node '%s' is unknown" % self.op.pnode) os_obj = rpc.call_os_get(pnode.name, self.op.os_type) if not os_obj: raise errors.OpPrereqError("OS '%s' not in supported OS list for" " primary node" % self.op.os_type) self.instance = instance def Exec(self, feedback_fn): """Reinstall the instance. """ inst = self.instance if self.op.os_type is not None: feedback_fn("Changing OS to '%s'..." % self.op.os_type) inst.os = self.op.os_type self.cfg.AddInstance(inst) _StartInstanceDisks(self.cfg, inst, None) try: feedback_fn("Running the instance OS create scripts...") if not rpc.call_instance_os_add(inst.primary_node, inst, "sda", "sdb"): raise errors.OpExecError("Could not install OS for instance %s" " on node %s" % (inst.name, inst.primary_node)) finally: _ShutdownInstanceDisks(inst, self.cfg) class LURenameInstance(LogicalUnit): """Rename an instance. """ HPATH = "instance-rename" HTYPE = constants.HTYPE_INSTANCE _OP_REQP = ["instance_name", "new_name"] def BuildHooksEnv(self): """Build hooks env. This runs on master, primary and secondary nodes of the instance. """ env = _BuildInstanceHookEnvByObject(self.instance) env["INSTANCE_NEW_NAME"] = self.op.new_name nl = ([self.sstore.GetMasterNode(), self.instance.primary_node] + list(self.instance.secondary_nodes)) return env, nl, nl def CheckPrereq(self): """Check prerequisites. This checks that the instance is in the cluster and is not running. """ instance = self.cfg.GetInstanceInfo( self.cfg.ExpandInstanceName(self.op.instance_name)) if instance is None: raise errors.OpPrereqError("Instance '%s' not known" % self.op.instance_name) if instance.status != "down": raise errors.OpPrereqError("Instance '%s' is marked to be up" % self.op.instance_name) remote_info = rpc.call_instance_info(instance.primary_node, instance.name) if remote_info: raise errors.OpPrereqError("Instance '%s' is running on the node %s" % (self.op.instance_name, instance.primary_node)) self.instance = instance # new name verification name_info = utils.HostInfo(self.op.new_name) self.op.new_name = new_name = name_info.name instance_list = self.cfg.GetInstanceList() if new_name in instance_list: raise errors.OpPrereqError("Instance '%s' is already in the cluster" % instance_name) if not getattr(self.op, "ignore_ip", False): command = ["fping", "-q", name_info.ip] result = utils.RunCmd(command) if not result.failed: raise errors.OpPrereqError("IP %s of instance %s already in use" % (name_info.ip, new_name)) def Exec(self, feedback_fn): """Reinstall the instance. """ inst = self.instance old_name = inst.name if inst.disk_template == constants.DT_FILE: old_file_storage_dir = os.path.dirname(inst.disks[0].logical_id[1]) self.cfg.RenameInstance(inst.name, self.op.new_name) # re-read the instance from the configuration after rename inst = self.cfg.GetInstanceInfo(self.op.new_name) if inst.disk_template == constants.DT_FILE: new_file_storage_dir = os.path.dirname(inst.disks[0].logical_id[1]) result = rpc.call_file_storage_dir_rename(inst.primary_node, old_file_storage_dir, new_file_storage_dir) if not result: raise errors.OpExecError("Could not connect to node '%s' to rename" " directory '%s' to '%s' (but the instance" " has been renamed in Ganeti)" % ( inst.primary_node, old_file_storage_dir, new_file_storage_dir)) if not result[0]: raise errors.OpExecError("Could not rename directory '%s' to '%s'" " (but the instance has been renamed in" " Ganeti)" % (old_file_storage_dir, new_file_storage_dir)) _StartInstanceDisks(self.cfg, inst, None) try: if not rpc.call_instance_run_rename(inst.primary_node, inst, old_name, "sda", "sdb"): msg = ("Could run OS rename script for instance %s on node %s (but the" " instance has been renamed in Ganeti)" % (inst.name, inst.primary_node)) logger.Error(msg) finally: _ShutdownInstanceDisks(inst, self.cfg) class LURemoveInstance(LogicalUnit): """Remove an instance. """ HPATH = "instance-remove" HTYPE = constants.HTYPE_INSTANCE _OP_REQP = ["instance_name"] def BuildHooksEnv(self): """Build hooks env. This runs on master, primary and secondary nodes of the instance. """ env = _BuildInstanceHookEnvByObject(self.instance) nl = [self.sstore.GetMasterNode()] return env, nl, nl def CheckPrereq(self): """Check prerequisites. This checks that the instance is in the cluster. """ instance = self.cfg.GetInstanceInfo( self.cfg.ExpandInstanceName(self.op.instance_name)) if instance is None: raise errors.OpPrereqError("Instance '%s' not known" % self.op.instance_name) self.instance = instance def Exec(self, feedback_fn): """Remove the instance. """ instance = self.instance logger.Info("shutting down instance %s on node %s" % (instance.name, instance.primary_node)) if not rpc.call_instance_shutdown(instance.primary_node, instance): if self.op.ignore_failures: feedback_fn("Warning: can't shutdown instance") else: raise errors.OpExecError("Could not shutdown instance %s on node %s" % (instance.name, instance.primary_node)) logger.Info("removing block devices for instance %s" % instance.name) if not _RemoveDisks(instance, self.cfg): if self.op.ignore_failures: feedback_fn("Warning: can't remove instance's disks") else: raise errors.OpExecError("Can't remove instance's disks") logger.Info("removing instance %s out of cluster config" % instance.name) self.cfg.RemoveInstance(instance.name) class LUQueryInstances(NoHooksLU): """Logical unit for querying instances. """ _OP_REQP = ["output_fields", "names"] def CheckPrereq(self): """Check prerequisites. This checks that the fields required are valid output fields. """ self.dynamic_fields = frozenset(["oper_state", "oper_ram", "status"]) _CheckOutputFields(static=["name", "os", "pnode", "snodes", "admin_state", "admin_ram", "disk_template", "ip", "mac", "bridge", "sda_size", "sdb_size", "vcpus"], dynamic=self.dynamic_fields, selected=self.op.output_fields) self.wanted = _GetWantedInstances(self, self.op.names) def Exec(self, feedback_fn): """Computes the list of nodes and their attributes. """ instance_names = self.wanted instance_list = [self.cfg.GetInstanceInfo(iname) for iname in instance_names] # begin data gathering nodes = frozenset([inst.primary_node for inst in instance_list]) bad_nodes = [] if self.dynamic_fields.intersection(self.op.output_fields): live_data = {} node_data = rpc.call_all_instances_info(nodes) for name in nodes: result = node_data[name] if result: live_data.update(result) elif result == False: bad_nodes.append(name) # else no instance is alive else: live_data = dict([(name, {}) for name in instance_names]) # end data gathering output = [] for instance in instance_list: iout = [] for field in self.op.output_fields: if field == "name": val = instance.name elif field == "os": val = instance.os elif field == "pnode": val = instance.primary_node elif field == "snodes": val = list(instance.secondary_nodes) elif field == "admin_state": val = (instance.status != "down") elif field == "oper_state": if instance.primary_node in bad_nodes: val = None else: val = bool(live_data.get(instance.name)) elif field == "status": if instance.primary_node in bad_nodes: val = "ERROR_nodedown" else: running = bool(live_data.get(instance.name)) if running: if instance.status != "down": val = "running" else: val = "ERROR_up" else: if instance.status != "down": val = "ERROR_down" else: val = "ADMIN_down" elif field == "admin_ram": val = instance.memory elif field == "oper_ram": if instance.primary_node in bad_nodes: val = None elif instance.name in live_data: val = live_data[instance.name].get("memory", "?") else: val = "-" elif field == "disk_template": val = instance.disk_template elif field == "ip": val = instance.nics[0].ip elif field == "bridge": val = instance.nics[0].bridge elif field == "mac": val = instance.nics[0].mac elif field == "sda_size" or field == "sdb_size": disk = instance.FindDisk(field[:3]) if disk is None: val = None else: val = disk.size elif field == "vcpus": val = instance.vcpus else: raise errors.ParameterError(field) iout.append(val) output.append(iout) return output class LUFailoverInstance(LogicalUnit): """Failover an instance. """ HPATH = "instance-failover" HTYPE = constants.HTYPE_INSTANCE _OP_REQP = ["instance_name", "ignore_consistency"] def BuildHooksEnv(self): """Build hooks env. This runs on master, primary and secondary nodes of the instance. """ env = { "IGNORE_CONSISTENCY": self.op.ignore_consistency, } env.update(_BuildInstanceHookEnvByObject(self.instance)) nl = [self.sstore.GetMasterNode()] + list(self.instance.secondary_nodes) return env, nl, nl def CheckPrereq(self): """Check prerequisites. This checks that the instance is in the cluster. """ instance = self.cfg.GetInstanceInfo( self.cfg.ExpandInstanceName(self.op.instance_name)) if instance is None: raise errors.OpPrereqError("Instance '%s' not known" % self.op.instance_name) if instance.disk_template not in constants.DTS_NET_MIRROR: raise errors.OpPrereqError("Instance's disk layout is not" " network mirrored, cannot failover.") secondary_nodes = instance.secondary_nodes if not secondary_nodes: raise errors.ProgrammerError("no secondary node but using " "DT_REMOTE_RAID1 template") target_node = secondary_nodes[0] # check memory requirements on the secondary node _CheckNodeFreeMemory(self.cfg, target_node, "failing over instance %s" % instance.name, instance.memory) # check bridge existance brlist = [nic.bridge for nic in instance.nics] if not rpc.call_bridges_exist(target_node, brlist): raise errors.OpPrereqError("One or more target bridges %s does not" " exist on destination node '%s'" % (brlist, target_node)) self.instance = instance def Exec(self, feedback_fn): """Failover an instance. The failover is done by shutting it down on its present node and starting it on the secondary. """ instance = self.instance source_node = instance.primary_node target_node = instance.secondary_nodes[0] feedback_fn("* checking disk consistency between source and target") for dev in instance.disks: # for remote_raid1, these are md over drbd if not _CheckDiskConsistency(self.cfg, dev, target_node, False): if instance.status == "up" and not self.op.ignore_consistency: raise errors.OpExecError("Disk %s is degraded on target node," " aborting failover." % dev.iv_name) feedback_fn("* shutting down instance on source node") logger.Info("Shutting down instance %s on node %s" % (instance.name, source_node)) if not rpc.call_instance_shutdown(source_node, instance): if self.op.ignore_consistency: logger.Error("Could not shutdown instance %s on node %s. Proceeding" " anyway. Please make sure node %s is down" % (instance.name, source_node, source_node)) else: raise errors.OpExecError("Could not shutdown instance %s on node %s" % (instance.name, source_node)) feedback_fn("* deactivating the instance's disks on source node") if not _ShutdownInstanceDisks(instance, self.cfg, ignore_primary=True): raise errors.OpExecError("Can't shut down the instance's disks.") instance.primary_node = target_node # distribute new instance config to the other nodes self.cfg.AddInstance(instance) # Only start the instance if it's marked as up if instance.status == "up": feedback_fn("* activating the instance's disks on target node") logger.Info("Starting instance %s on node %s" % (instance.name, target_node)) disks_ok, dummy = _AssembleInstanceDisks(instance, self.cfg, ignore_secondaries=True) if not disks_ok: _ShutdownInstanceDisks(instance, self.cfg) raise errors.OpExecError("Can't activate the instance's disks") feedback_fn("* starting the instance on the target node") if not rpc.call_instance_start(target_node, instance, None): _ShutdownInstanceDisks(instance, self.cfg) raise errors.OpExecError("Could not start instance %s on node %s." % (instance.name, target_node)) def _CreateBlockDevOnPrimary(cfg, node, instance, device, info): """Create a tree of block devices on the primary node. This always creates all devices. """ if device.children: for child in device.children: if not _CreateBlockDevOnPrimary(cfg, node, instance, child, info): return False cfg.SetDiskID(device, node) new_id = rpc.call_blockdev_create(node, device, device.size, instance.name, True, info) if not new_id: return False if device.physical_id is None: device.physical_id = new_id return True def _CreateBlockDevOnSecondary(cfg, node, instance, device, force, info): """Create a tree of block devices on a secondary node. If this device type has to be created on secondaries, create it and all its children. If not, just recurse to children keeping the same 'force' value. """ if device.CreateOnSecondary(): force = True if device.children: for child in device.children: if not _CreateBlockDevOnSecondary(cfg, node, instance, child, force, info): return False if not force: return True cfg.SetDiskID(device, node) new_id = rpc.call_blockdev_create(node, device, device.size, instance.name, False, info) if not new_id: return False if device.physical_id is None: device.physical_id = new_id return True def _GenerateUniqueNames(cfg, exts): """Generate a suitable LV name. This will generate a logical volume name for the given instance. """ results = [] for val in exts: new_id = cfg.GenerateUniqueID() results.append("%s%s" % (new_id, val)) return results def _GenerateMDDRBDBranch(cfg, primary, secondary, size, names): """Generate a drbd device complete with its children. """ port = cfg.AllocatePort() vgname = cfg.GetVGName() dev_data = objects.Disk(dev_type=constants.LD_LV, size=size, logical_id=(vgname, names[0])) dev_meta = objects.Disk(dev_type=constants.LD_LV, size=128, logical_id=(vgname, names[1])) drbd_dev = objects.Disk(dev_type=constants.LD_DRBD7, size=size, logical_id = (primary, secondary, port), children = [dev_data, dev_meta]) return drbd_dev def _GenerateDRBD8Branch(cfg, primary, secondary, size, names, iv_name): """Generate a drbd8 device complete with its children. """ port = cfg.AllocatePort() vgname = cfg.GetVGName() dev_data = objects.Disk(dev_type=constants.LD_LV, size=size, logical_id=(vgname, names[0])) dev_meta = objects.Disk(dev_type=constants.LD_LV, size=128, logical_id=(vgname, names[1])) drbd_dev = objects.Disk(dev_type=constants.LD_DRBD8, size=size, logical_id = (primary, secondary, port), children = [dev_data, dev_meta], iv_name=iv_name) return drbd_dev def _GenerateDiskTemplate(cfg, template_name, instance_name, primary_node, secondary_nodes, disk_sz, swap_sz, file_storage_dir, file_driver): """Generate the entire disk layout for a given template type. """ #TODO: compute space requirements vgname = cfg.GetVGName() if template_name == constants.DT_DISKLESS: disks = [] elif template_name == constants.DT_PLAIN: if len(secondary_nodes) != 0: raise errors.ProgrammerError("Wrong template configuration") names = _GenerateUniqueNames(cfg, [".sda", ".sdb"]) sda_dev = objects.Disk(dev_type=constants.LD_LV, size=disk_sz, logical_id=(vgname, names[0]), iv_name = "sda") sdb_dev = objects.Disk(dev_type=constants.LD_LV, size=swap_sz, logical_id=(vgname, names[1]), iv_name = "sdb") disks = [sda_dev, sdb_dev] elif template_name == constants.DT_DRBD8: if len(secondary_nodes) != 1: raise errors.ProgrammerError("Wrong template configuration") remote_node = secondary_nodes[0] names = _GenerateUniqueNames(cfg, [".sda_data", ".sda_meta", ".sdb_data", ".sdb_meta"]) drbd_sda_dev = _GenerateDRBD8Branch(cfg, primary_node, remote_node, disk_sz, names[0:2], "sda") drbd_sdb_dev = _GenerateDRBD8Branch(cfg, primary_node, remote_node, swap_sz, names[2:4], "sdb") disks = [drbd_sda_dev, drbd_sdb_dev] elif template_name == constants.DT_FILE: if len(secondary_nodes) != 0: raise errors.ProgrammerError("Wrong template configuration") file_sda_dev = objects.Disk(dev_type=constants.LD_FILE, size=disk_sz, iv_name="sda", logical_id=(file_driver, "%s/sda" % file_storage_dir)) file_sdb_dev = objects.Disk(dev_type=constants.LD_FILE, size=swap_sz, iv_name="sdb", logical_id=(file_driver, "%s/sdb" % file_storage_dir)) disks = [file_sda_dev, file_sdb_dev] else: raise errors.ProgrammerError("Invalid disk template '%s'" % template_name) return disks def _GetInstanceInfoText(instance): """Compute that text that should be added to the disk's metadata. """ return "originstname+%s" % instance.name def _CreateDisks(cfg, instance): """Create all disks for an instance. This abstracts away some work from AddInstance. Args: instance: the instance object Returns: True or False showing the success of the creation process """ info = _GetInstanceInfoText(instance) if instance.disk_template == constants.DT_FILE: file_storage_dir = os.path.dirname(instance.disks[0].logical_id[1]) result = rpc.call_file_storage_dir_create(instance.primary_node, file_storage_dir) if not result: logger.Error("Could not connect to node '%s'" % inst.primary_node) return False if not result[0]: logger.Error("failed to create directory '%s'" % file_storage_dir) return False for device in instance.disks: logger.Info("creating volume %s for instance %s" % (device.iv_name, instance.name)) #HARDCODE for secondary_node in instance.secondary_nodes: if not _CreateBlockDevOnSecondary(cfg, secondary_node, instance, device, False, info): logger.Error("failed to create volume %s (%s) on secondary node %s!" % (device.iv_name, device, secondary_node)) return False #HARDCODE if not _CreateBlockDevOnPrimary(cfg, instance.primary_node, instance, device, info): logger.Error("failed to create volume %s on primary!" % device.iv_name) return False return True def _RemoveDisks(instance, cfg): """Remove all disks for an instance. This abstracts away some work from `AddInstance()` and `RemoveInstance()`. Note that in case some of the devices couldn't be removed, the removal will continue with the other ones (compare with `_CreateDisks()`). Args: instance: the instance object Returns: True or False showing the success of the removal proces """ logger.Info("removing block devices for instance %s" % instance.name) result = True for device in instance.disks: for node, disk in device.ComputeNodeTree(instance.primary_node): cfg.SetDiskID(disk, node) if not rpc.call_blockdev_remove(node, disk): logger.Error("could not remove block device %s on node %s," " continuing anyway" % (device.iv_name, node)) result = False if instance.disk_template == constants.DT_FILE: file_storage_dir = os.path.dirname(instance.disks[0].logical_id[1]) if not rpc.call_file_storage_dir_remove(instance.primary_node, file_storage_dir): logger.Error("could not remove directory '%s'" % file_storage_dir) result = False return result class LUCreateInstance(LogicalUnit): """Create an instance. """ HPATH = "instance-add" HTYPE = constants.HTYPE_INSTANCE _OP_REQP = ["instance_name", "mem_size", "disk_size", "pnode", "disk_template", "swap_size", "mode", "start", "vcpus", "wait_for_sync", "ip_check", "mac"] def BuildHooksEnv(self): """Build hooks env. This runs on master, primary and secondary nodes of the instance. """ env = { "INSTANCE_DISK_TEMPLATE": self.op.disk_template, "INSTANCE_DISK_SIZE": self.op.disk_size, "INSTANCE_SWAP_SIZE": self.op.swap_size, "INSTANCE_ADD_MODE": self.op.mode, } if self.op.mode == constants.INSTANCE_IMPORT: env["INSTANCE_SRC_NODE"] = self.op.src_node env["INSTANCE_SRC_PATH"] = self.op.src_path env["INSTANCE_SRC_IMAGE"] = self.src_image env.update(_BuildInstanceHookEnv(name=self.op.instance_name, primary_node=self.op.pnode, secondary_nodes=self.secondaries, status=self.instance_status, os_type=self.op.os_type, memory=self.op.mem_size, vcpus=self.op.vcpus, nics=[(self.inst_ip, self.op.bridge, self.op.mac)], )) nl = ([self.sstore.GetMasterNode(), self.op.pnode] + self.secondaries) return env, nl, nl def CheckPrereq(self): """Check prerequisites. """ for attr in ["kernel_path", "initrd_path", "hvm_boot_order"]: if not hasattr(self.op, attr): setattr(self.op, attr, None) if self.op.mode not in (constants.INSTANCE_CREATE, constants.INSTANCE_IMPORT): raise errors.OpPrereqError("Invalid instance creation mode '%s'" % self.op.mode) if (not self.cfg.GetVGName() and self.op.disk_template not in constants.DTS_NOT_LVM): raise errors.OpPrereqError("Cluster does not support lvm-based" " instances") if self.op.mode == constants.INSTANCE_IMPORT: src_node = getattr(self.op, "src_node", None) src_path = getattr(self.op, "src_path", None) if src_node is None or src_path is None: raise errors.OpPrereqError("Importing an instance requires source" " node and path options") src_node_full = self.cfg.ExpandNodeName(src_node) if src_node_full is None: raise errors.OpPrereqError("Unknown source node '%s'" % src_node) self.op.src_node = src_node = src_node_full if not os.path.isabs(src_path): raise errors.OpPrereqError("The source path must be absolute") export_info = rpc.call_export_info(src_node, src_path) if not export_info: raise errors.OpPrereqError("No export found in dir %s" % src_path) if not export_info.has_section(constants.INISECT_EXP): raise errors.ProgrammerError("Corrupted export config") ei_version = export_info.get(constants.INISECT_EXP, 'version') if (int(ei_version) != constants.EXPORT_VERSION): raise errors.OpPrereqError("Wrong export version %s (wanted %d)" % (ei_version, constants.EXPORT_VERSION)) if int(export_info.get(constants.INISECT_INS, 'disk_count')) > 1: raise errors.OpPrereqError("Can't import instance with more than" " one data disk") # FIXME: are the old os-es, disk sizes, etc. useful? self.op.os_type = export_info.get(constants.INISECT_EXP, 'os') diskimage = os.path.join(src_path, export_info.get(constants.INISECT_INS, 'disk0_dump')) self.src_image = diskimage else: # INSTANCE_CREATE if getattr(self.op, "os_type", None) is None: raise errors.OpPrereqError("No guest OS specified") # check primary node pnode = self.cfg.GetNodeInfo(self.cfg.ExpandNodeName(self.op.pnode)) if pnode is None: raise errors.OpPrereqError("Primary node '%s' is unknown" % self.op.pnode) self.op.pnode = pnode.name self.pnode = pnode self.secondaries = [] # disk template and mirror node verification if self.op.disk_template not in constants.DISK_TEMPLATES: raise errors.OpPrereqError("Invalid disk template name") if (self.op.file_driver and not self.op.file_driver in constants.FILE_DRIVER): raise errors.OpPrereqError("Invalid file driver name '%s'" % self.op.file_driver) if self.op.file_storage_dir and os.path.isabs(self.op.file_storage_dir): raise errors.OpPrereqError("File storage directory not a relative" " path") if self.op.disk_template in constants.DTS_NET_MIRROR: if getattr(self.op, "snode", None) is None: raise errors.OpPrereqError("The networked disk templates need" " a mirror node") snode_name = self.cfg.ExpandNodeName(self.op.snode) if snode_name is None: raise errors.OpPrereqError("Unknown secondary node '%s'" % self.op.snode) elif snode_name == pnode.name: raise errors.OpPrereqError("The secondary node cannot be" " the primary node.") self.secondaries.append(snode_name) # Required free disk space as a function of disk and swap space req_size_dict = { constants.DT_DISKLESS: None, constants.DT_PLAIN: self.op.disk_size + self.op.swap_size, # 256 MB are added for drbd metadata, 128MB for each drbd device constants.DT_DRBD8: self.op.disk_size + self.op.swap_size + 256, constants.DT_FILE: None, } if self.op.disk_template not in req_size_dict: raise errors.ProgrammerError("Disk template '%s' size requirement" " is unknown" % self.op.disk_template) req_size = req_size_dict[self.op.disk_template] # Check lv size requirements if req_size is not None: nodenames = [pnode.name] + self.secondaries nodeinfo = rpc.call_node_info(nodenames, self.cfg.GetVGName()) for node in nodenames: info = nodeinfo.get(node, None) if not info: raise errors.OpPrereqError("Cannot get current information" " from node '%s'" % nodeinfo) vg_free = info.get('vg_free', None) if not isinstance(vg_free, int): raise errors.OpPrereqError("Can't compute free disk space on" " node %s" % node) if req_size > info['vg_free']: raise errors.OpPrereqError("Not enough disk space on target node %s." " %d MB available, %d MB required" % (node, info['vg_free'], req_size)) # os verification os_obj = rpc.call_os_get(pnode.name, self.op.os_type) if not os_obj: raise errors.OpPrereqError("OS '%s' not in supported os list for" " primary node" % self.op.os_type) if self.op.kernel_path == constants.VALUE_NONE: raise errors.OpPrereqError("Can't set instance kernel to none") # instance verification hostname1 = utils.HostInfo(self.op.instance_name) self.op.instance_name = instance_name = hostname1.name instance_list = self.cfg.GetInstanceList() if instance_name in instance_list: raise errors.OpPrereqError("Instance '%s' is already in the cluster" % instance_name) ip = getattr(self.op, "ip", None) if ip is None or ip.lower() == "none": inst_ip = None elif ip.lower() == "auto": inst_ip = hostname1.ip else: if not utils.IsValidIP(ip): raise errors.OpPrereqError("given IP address '%s' doesn't look" " like a valid IP" % ip) inst_ip = ip self.inst_ip = inst_ip if self.op.start and not self.op.ip_check: raise errors.OpPrereqError("Cannot ignore IP address conflicts when" " adding an instance in start mode") if self.op.ip_check: if utils.TcpPing(hostname1.ip, constants.DEFAULT_NODED_PORT): raise errors.OpPrereqError("IP %s of instance %s already in use" % (hostname1.ip, instance_name)) # MAC address verification if self.op.mac != "auto": if not utils.IsValidMac(self.op.mac.lower()): raise errors.OpPrereqError("invalid MAC address specified: %s" % self.op.mac) # bridge verification bridge = getattr(self.op, "bridge", None) if bridge is None: self.op.bridge = self.cfg.GetDefBridge() else: self.op.bridge = bridge if not rpc.call_bridges_exist(self.pnode.name, [self.op.bridge]): raise errors.OpPrereqError("target bridge '%s' does not exist on" " destination node '%s'" % (self.op.bridge, pnode.name)) # boot order verification if self.op.hvm_boot_order is not None: if len(self.op.hvm_boot_order.strip("acdn")) != 0: raise errors.OpPrereqError("invalid boot order specified," " must be one or more of [acdn]") if self.op.start: self.instance_status = 'up' else: self.instance_status = 'down' def Exec(self, feedback_fn): """Create and add the instance to the cluster. """ instance = self.op.instance_name pnode_name = self.pnode.name if self.op.mac == "auto": mac_address = self.cfg.GenerateMAC() else: mac_address = self.op.mac nic = objects.NIC(bridge=self.op.bridge, mac=mac_address) if self.inst_ip is not None: nic.ip = self.inst_ip ht_kind = self.sstore.GetHypervisorType() if ht_kind in constants.HTS_REQ_PORT: network_port = self.cfg.AllocatePort() else: network_port = None # this is needed because os.path.join does not accept None arguments if self.op.file_storage_dir is None: string_file_storage_dir = "" else: string_file_storage_dir = self.op.file_storage_dir # build the full file storage dir path file_storage_dir = os.path.normpath(os.path.join( self.sstore.GetFileStorageDir(), string_file_storage_dir, instance)) disks = _GenerateDiskTemplate(self.cfg, self.op.disk_template, instance, pnode_name, self.secondaries, self.op.disk_size, self.op.swap_size, file_storage_dir, self.op.file_driver) iobj = objects.Instance(name=instance, os=self.op.os_type, primary_node=pnode_name, memory=self.op.mem_size, vcpus=self.op.vcpus, nics=[nic], disks=disks, disk_template=self.op.disk_template, status=self.instance_status, network_port=network_port, kernel_path=self.op.kernel_path, initrd_path=self.op.initrd_path, hvm_boot_order=self.op.hvm_boot_order, ) feedback_fn("* creating instance disks...") if not _CreateDisks(self.cfg, iobj): _RemoveDisks(iobj, self.cfg) raise errors.OpExecError("Device creation failed, reverting...") feedback_fn("adding instance %s to cluster config" % instance) self.cfg.AddInstance(iobj) if self.op.wait_for_sync: disk_abort = not _WaitForSync(self.cfg, iobj, self.proc) elif iobj.disk_template in constants.DTS_NET_MIRROR: # make sure the disks are not degraded (still sync-ing is ok) time.sleep(15) feedback_fn("* checking mirrors status") disk_abort = not _WaitForSync(self.cfg, iobj, self.proc, oneshot=True) else: disk_abort = False if disk_abort: _RemoveDisks(iobj, self.cfg) self.cfg.RemoveInstance(iobj.name) raise errors.OpExecError("There are some degraded disks for" " this instance") feedback_fn("creating os for instance %s on node %s" % (instance, pnode_name)) if iobj.disk_template != constants.DT_DISKLESS: if self.op.mode == constants.INSTANCE_CREATE: feedback_fn("* running the instance OS create scripts...") if not rpc.call_instance_os_add(pnode_name, iobj, "sda", "sdb"): raise errors.OpExecError("could not add os for instance %s" " on node %s" % (instance, pnode_name)) elif self.op.mode == constants.INSTANCE_IMPORT: feedback_fn("* running the instance OS import scripts...") src_node = self.op.src_node src_image = self.src_image if not rpc.call_instance_os_import(pnode_name, iobj, "sda", "sdb", src_node, src_image): raise errors.OpExecError("Could not import os for instance" " %s on node %s" % (instance, pnode_name)) else: # also checked in the prereq part raise errors.ProgrammerError("Unknown OS initialization mode '%s'" % self.op.mode) if self.op.start: logger.Info("starting instance %s on node %s" % (instance, pnode_name)) feedback_fn("* starting instance...") if not rpc.call_instance_start(pnode_name, iobj, None): raise errors.OpExecError("Could not start instance") class LUConnectConsole(NoHooksLU): """Connect to an instance's console. This is somewhat special in that it returns the command line that you need to run on the master node in order to connect to the console. """ _OP_REQP = ["instance_name"] def CheckPrereq(self): """Check prerequisites. This checks that the instance is in the cluster. """ instance = self.cfg.GetInstanceInfo( self.cfg.ExpandInstanceName(self.op.instance_name)) if instance is None: raise errors.OpPrereqError("Instance '%s' not known" % self.op.instance_name) self.instance = instance def Exec(self, feedback_fn): """Connect to the console of an instance """ instance = self.instance node = instance.primary_node node_insts = rpc.call_instance_list([node])[node] if node_insts is False: raise errors.OpExecError("Can't connect to node %s." % node) if instance.name not in node_insts: raise errors.OpExecError("Instance %s is not running." % instance.name) logger.Debug("connecting to console of %s on %s" % (instance.name, node)) hyper = hypervisor.GetHypervisor() console_cmd = hyper.GetShellCommandForConsole(instance) # build ssh cmdline return self.ssh.BuildCmd(node, "root", console_cmd, batch=True, tty=True) class LUReplaceDisks(LogicalUnit): """Replace the disks of an instance. """ HPATH = "mirrors-replace" HTYPE = constants.HTYPE_INSTANCE _OP_REQP = ["instance_name", "mode", "disks"] def BuildHooksEnv(self): """Build hooks env. This runs on the master, the primary and all the secondaries. """ env = { "MODE": self.op.mode, "NEW_SECONDARY": self.op.remote_node, "OLD_SECONDARY": self.instance.secondary_nodes[0], } env.update(_BuildInstanceHookEnvByObject(self.instance)) nl = [ self.sstore.GetMasterNode(), self.instance.primary_node, ] if self.op.remote_node is not None: nl.append(self.op.remote_node) return env, nl, nl def CheckPrereq(self): """Check prerequisites. This checks that the instance is in the cluster. """ instance = self.cfg.GetInstanceInfo( self.cfg.ExpandInstanceName(self.op.instance_name)) if instance is None: raise errors.OpPrereqError("Instance '%s' not known" % self.op.instance_name) self.instance = instance self.op.instance_name = instance.name if instance.disk_template not in constants.DTS_NET_MIRROR: raise errors.OpPrereqError("Instance's disk layout is not" " network mirrored.") if len(instance.secondary_nodes) != 1: raise errors.OpPrereqError("The instance has a strange layout," " expected one secondary but found %d" % len(instance.secondary_nodes)) self.sec_node = instance.secondary_nodes[0] remote_node = getattr(self.op, "remote_node", None) if remote_node is not None: remote_node = self.cfg.ExpandNodeName(remote_node) if remote_node is None: raise errors.OpPrereqError("Node '%s' not known" % self.op.remote_node) self.remote_node_info = self.cfg.GetNodeInfo(remote_node) else: self.remote_node_info = None if remote_node == instance.primary_node: raise errors.OpPrereqError("The specified node is the primary node of" " the instance.") elif remote_node == self.sec_node: if self.op.mode == constants.REPLACE_DISK_SEC: # this is for DRBD8, where we can't execute the same mode of # replacement as for drbd7 (no different port allocated) raise errors.OpPrereqError("Same secondary given, cannot execute" " replacement") # the user gave the current secondary, switch to # 'no-replace-secondary' mode for drbd7 remote_node = None if (instance.disk_template == constants.DT_REMOTE_RAID1 and self.op.mode != constants.REPLACE_DISK_ALL): raise errors.OpPrereqError("Template 'remote_raid1' only allows all" " disks replacement, not individual ones") if instance.disk_template == constants.DT_DRBD8: if (self.op.mode == constants.REPLACE_DISK_ALL and remote_node is not None): # switch to replace secondary mode self.op.mode = constants.REPLACE_DISK_SEC if self.op.mode == constants.REPLACE_DISK_ALL: raise errors.OpPrereqError("Template 'drbd' only allows primary or" " secondary disk replacement, not" " both at once") elif self.op.mode == constants.REPLACE_DISK_PRI: if remote_node is not None: raise errors.OpPrereqError("Template 'drbd' does not allow changing" " the secondary while doing a primary" " node disk replacement") self.tgt_node = instance.primary_node self.oth_node = instance.secondary_nodes[0] elif self.op.mode == constants.REPLACE_DISK_SEC: self.new_node = remote_node # this can be None, in which case # we don't change the secondary self.tgt_node = instance.secondary_nodes[0] self.oth_node = instance.primary_node else: raise errors.ProgrammerError("Unhandled disk replace mode") for name in self.op.disks: if instance.FindDisk(name) is None: raise errors.OpPrereqError("Disk '%s' not found for instance '%s'" % (name, instance.name)) self.op.remote_node = remote_node def _ExecRR1(self, feedback_fn): """Replace the disks of an instance. """ instance = self.instance iv_names = {} # start of work if self.op.remote_node is None: remote_node = self.sec_node else: remote_node = self.op.remote_node cfg = self.cfg for dev in instance.disks: size = dev.size lv_names = [".%s_%s" % (dev.iv_name, suf) for suf in ["data", "meta"]] names = _GenerateUniqueNames(cfg, lv_names) new_drbd = _GenerateMDDRBDBranch(cfg, instance.primary_node, remote_node, size, names) iv_names[dev.iv_name] = (dev, dev.children[0], new_drbd) logger.Info("adding new mirror component on secondary for %s" % dev.iv_name) #HARDCODE if not _CreateBlockDevOnSecondary(cfg, remote_node, instance, new_drbd, False, _GetInstanceInfoText(instance)): raise errors.OpExecError("Failed to create new component on secondary" " node %s. Full abort, cleanup manually!" % remote_node) logger.Info("adding new mirror component on primary") #HARDCODE if not _CreateBlockDevOnPrimary(cfg, instance.primary_node, instance, new_drbd, _GetInstanceInfoText(instance)): # remove secondary dev cfg.SetDiskID(new_drbd, remote_node) rpc.call_blockdev_remove(remote_node, new_drbd) raise errors.OpExecError("Failed to create volume on primary!" " Full abort, cleanup manually!!") # the device exists now # call the primary node to add the mirror to md logger.Info("adding new mirror component to md") if not rpc.call_blockdev_addchildren(instance.primary_node, dev, [new_drbd]): logger.Error("Can't add mirror compoment to md!") cfg.SetDiskID(new_drbd, remote_node) if not rpc.call_blockdev_remove(remote_node, new_drbd): logger.Error("Can't rollback on secondary") cfg.SetDiskID(new_drbd, instance.primary_node) if not rpc.call_blockdev_remove(instance.primary_node, new_drbd): logger.Error("Can't rollback on primary") raise errors.OpExecError("Full abort, cleanup manually!!") dev.children.append(new_drbd) cfg.AddInstance(instance) # this can fail as the old devices are degraded and _WaitForSync # does a combined result over all disks, so we don't check its # return value _WaitForSync(cfg, instance, self.proc, unlock=True) # so check manually all the devices for name in iv_names: dev, child, new_drbd = iv_names[name] cfg.SetDiskID(dev, instance.primary_node) is_degr = rpc.call_blockdev_find(instance.primary_node, dev)[5] if is_degr: raise errors.OpExecError("MD device %s is degraded!" % name) cfg.SetDiskID(new_drbd, instance.primary_node) is_degr = rpc.call_blockdev_find(instance.primary_node, new_drbd)[5] if is_degr: raise errors.OpExecError("New drbd device %s is degraded!" % name) for name in iv_names: dev, child, new_drbd = iv_names[name] logger.Info("remove mirror %s component" % name) cfg.SetDiskID(dev, instance.primary_node) if not rpc.call_blockdev_removechildren(instance.primary_node, dev, [child]): logger.Error("Can't remove child from mirror, aborting" " *this device cleanup*.\nYou need to cleanup manually!!") continue for node in child.logical_id[:2]: logger.Info("remove child device on %s" % node) cfg.SetDiskID(child, node) if not rpc.call_blockdev_remove(node, child): logger.Error("Warning: failed to remove device from node %s," " continuing operation." % node) dev.children.remove(child) cfg.AddInstance(instance) def _ExecD8DiskOnly(self, feedback_fn): """Replace a disk on the primary or secondary for dbrd8. The algorithm for replace is quite complicated: - for each disk to be replaced: - create new LVs on the target node with unique names - detach old LVs from the drbd device - rename old LVs to name_replaced. - rename new LVs to old LVs - attach the new LVs (with the old names now) to the drbd device - wait for sync across all devices - for each modified disk: - remove old LVs (which have the name name_replaces.) Failures are not very well handled. """ steps_total = 6 warning, info = (self.proc.LogWarning, self.proc.LogInfo) instance = self.instance iv_names = {} vgname = self.cfg.GetVGName() # start of work cfg = self.cfg tgt_node = self.tgt_node oth_node = self.oth_node # Step: check device activation self.proc.LogStep(1, steps_total, "check device existence") info("checking volume groups") my_vg = cfg.GetVGName() results = rpc.call_vg_list([oth_node, tgt_node]) if not results: raise errors.OpExecError("Can't list volume groups on the nodes") for node in oth_node, tgt_node: res = results.get(node, False) if not res or my_vg not in res: raise errors.OpExecError("Volume group '%s' not found on %s" % (my_vg, node)) for dev in instance.disks: if not dev.iv_name in self.op.disks: continue for node in tgt_node, oth_node: info("checking %s on %s" % (dev.iv_name, node)) cfg.SetDiskID(dev, node) if not rpc.call_blockdev_find(node, dev): raise errors.OpExecError("Can't find device %s on node %s" % (dev.iv_name, node)) # Step: check other node consistency self.proc.LogStep(2, steps_total, "check peer consistency") for dev in instance.disks: if not dev.iv_name in self.op.disks: continue info("checking %s consistency on %s" % (dev.iv_name, oth_node)) if not _CheckDiskConsistency(self.cfg, dev, oth_node, oth_node==instance.primary_node): raise errors.OpExecError("Peer node (%s) has degraded storage, unsafe" " to replace disks on this node (%s)" % (oth_node, tgt_node)) # Step: create new storage self.proc.LogStep(3, steps_total, "allocate new storage") for dev in instance.disks: if not dev.iv_name in self.op.disks: continue size = dev.size cfg.SetDiskID(dev, tgt_node) lv_names = [".%s_%s" % (dev.iv_name, suf) for suf in ["data", "meta"]] names = _GenerateUniqueNames(cfg, lv_names) lv_data = objects.Disk(dev_type=constants.LD_LV, size=size, logical_id=(vgname, names[0])) lv_meta = objects.Disk(dev_type=constants.LD_LV, size=128, logical_id=(vgname, names[1])) new_lvs = [lv_data, lv_meta] old_lvs = dev.children iv_names[dev.iv_name] = (dev, old_lvs, new_lvs) info("creating new local storage on %s for %s" % (tgt_node, dev.iv_name)) # since we *always* want to create this LV, we use the # _Create...OnPrimary (which forces the creation), even if we # are talking about the secondary node for new_lv in new_lvs: if not _CreateBlockDevOnPrimary(cfg, tgt_node, instance, new_lv, _GetInstanceInfoText(instance)): raise errors.OpExecError("Failed to create new LV named '%s' on" " node '%s'" % (new_lv.logical_id[1], tgt_node)) # Step: for each lv, detach+rename*2+attach self.proc.LogStep(4, steps_total, "change drbd configuration") for dev, old_lvs, new_lvs in iv_names.itervalues(): info("detaching %s drbd from local storage" % dev.iv_name) if not rpc.call_blockdev_removechildren(tgt_node, dev, old_lvs): raise errors.OpExecError("Can't detach drbd from local storage on node" " %s for device %s" % (tgt_node, dev.iv_name)) #dev.children = [] #cfg.Update(instance) # ok, we created the new LVs, so now we know we have the needed # storage; as such, we proceed on the target node to rename # old_lv to _old, and new_lv to old_lv; note that we rename LVs # using the assumption that logical_id == physical_id (which in # turn is the unique_id on that node) # FIXME(iustin): use a better name for the replaced LVs temp_suffix = int(time.time()) ren_fn = lambda d, suff: (d.physical_id[0], d.physical_id[1] + "_replaced-%s" % suff) # build the rename list based on what LVs exist on the node rlist = [] for to_ren in old_lvs: find_res = rpc.call_blockdev_find(tgt_node, to_ren) if find_res is not None: # device exists rlist.append((to_ren, ren_fn(to_ren, temp_suffix))) info("renaming the old LVs on the target node") if not rpc.call_blockdev_rename(tgt_node, rlist): raise errors.OpExecError("Can't rename old LVs on node %s" % tgt_node) # now we rename the new LVs to the old LVs info("renaming the new LVs on the target node") rlist = [(new, old.physical_id) for old, new in zip(old_lvs, new_lvs)] if not rpc.call_blockdev_rename(tgt_node, rlist): raise errors.OpExecError("Can't rename new LVs on node %s" % tgt_node) for old, new in zip(old_lvs, new_lvs): new.logical_id = old.logical_id cfg.SetDiskID(new, tgt_node) for disk in old_lvs: disk.logical_id = ren_fn(disk, temp_suffix) cfg.SetDiskID(disk, tgt_node) # now that the new lvs have the old name, we can add them to the device info("adding new mirror component on %s" % tgt_node) if not rpc.call_blockdev_addchildren(tgt_node, dev, new_lvs): for new_lv in new_lvs: if not rpc.call_blockdev_remove(tgt_node, new_lv): warning("Can't rollback device %s", hint="manually cleanup unused" " logical volumes") raise errors.OpExecError("Can't add local storage to drbd") dev.children = new_lvs cfg.Update(instance) # Step: wait for sync # this can fail as the old devices are degraded and _WaitForSync # does a combined result over all disks, so we don't check its # return value self.proc.LogStep(5, steps_total, "sync devices") _WaitForSync(cfg, instance, self.proc, unlock=True) # so check manually all the devices for name, (dev, old_lvs, new_lvs) in iv_names.iteritems(): cfg.SetDiskID(dev, instance.primary_node) is_degr = rpc.call_blockdev_find(instance.primary_node, dev)[5] if is_degr: raise errors.OpExecError("DRBD device %s is degraded!" % name) # Step: remove old storage self.proc.LogStep(6, steps_total, "removing old storage") for name, (dev, old_lvs, new_lvs) in iv_names.iteritems(): info("remove logical volumes for %s" % name) for lv in old_lvs: cfg.SetDiskID(lv, tgt_node) if not rpc.call_blockdev_remove(tgt_node, lv): warning("Can't remove old LV", hint="manually remove unused LVs") continue def _ExecD8Secondary(self, feedback_fn): """Replace the secondary node for drbd8. The algorithm for replace is quite complicated: - for all disks of the instance: - create new LVs on the new node with same names - shutdown the drbd device on the old secondary - disconnect the drbd network on the primary - create the drbd device on the new secondary - network attach the drbd on the primary, using an artifice: the drbd code for Attach() will connect to the network if it finds a device which is connected to the good local disks but not network enabled - wait for sync across all devices - remove all disks from the old secondary Failures are not very well handled. """ steps_total = 6 warning, info = (self.proc.LogWarning, self.proc.LogInfo) instance = self.instance iv_names = {} vgname = self.cfg.GetVGName() # start of work cfg = self.cfg old_node = self.tgt_node new_node = self.new_node pri_node = instance.primary_node # Step: check device activation self.proc.LogStep(1, steps_total, "check device existence") info("checking volume groups") my_vg = cfg.GetVGName() results = rpc.call_vg_list([pri_node, new_node]) if not results: raise errors.OpExecError("Can't list volume groups on the nodes") for node in pri_node, new_node: res = results.get(node, False) if not res or my_vg not in res: raise errors.OpExecError("Volume group '%s' not found on %s" % (my_vg, node)) for dev in instance.disks: if not dev.iv_name in self.op.disks: continue info("checking %s on %s" % (dev.iv_name, pri_node)) cfg.SetDiskID(dev, pri_node) if not rpc.call_blockdev_find(pri_node, dev): raise errors.OpExecError("Can't find device %s on node %s" % (dev.iv_name, pri_node)) # Step: check other node consistency self.proc.LogStep(2, steps_total, "check peer consistency") for dev in instance.disks: if not dev.iv_name in self.op.disks: continue info("checking %s consistency on %s" % (dev.iv_name, pri_node)) if not _CheckDiskConsistency(self.cfg, dev, pri_node, True, ldisk=True): raise errors.OpExecError("Primary node (%s) has degraded storage," " unsafe to replace the secondary" % pri_node) # Step: create new storage self.proc.LogStep(3, steps_total, "allocate new storage") for dev in instance.disks: size = dev.size info("adding new local storage on %s for %s" % (new_node, dev.iv_name)) # since we *always* want to create this LV, we use the # _Create...OnPrimary (which forces the creation), even if we # are talking about the secondary node for new_lv in dev.children: if not _CreateBlockDevOnPrimary(cfg, new_node, instance, new_lv, _GetInstanceInfoText(instance)): raise errors.OpExecError("Failed to create new LV named '%s' on" " node '%s'" % (new_lv.logical_id[1], new_node)) iv_names[dev.iv_name] = (dev, dev.children) self.proc.LogStep(4, steps_total, "changing drbd configuration") for dev in instance.disks: size = dev.size info("activating a new drbd on %s for %s" % (new_node, dev.iv_name)) # create new devices on new_node new_drbd = objects.Disk(dev_type=constants.LD_DRBD8, logical_id=(pri_node, new_node, dev.logical_id[2]), children=dev.children) if not _CreateBlockDevOnSecondary(cfg, new_node, instance, new_drbd, False, _GetInstanceInfoText(instance)): raise errors.OpExecError("Failed to create new DRBD on" " node '%s'" % new_node) for dev in instance.disks: # we have new devices, shutdown the drbd on the old secondary info("shutting down drbd for %s on old node" % dev.iv_name) cfg.SetDiskID(dev, old_node) if not rpc.call_blockdev_shutdown(old_node, dev): warning("Failed to shutdown drbd for %s on old node" % dev.iv_name, hint="Please cleanup this device manually as soon as possible") info("detaching primary drbds from the network (=> standalone)") done = 0 for dev in instance.disks: cfg.SetDiskID(dev, pri_node) # set the physical (unique in bdev terms) id to None, meaning # detach from network dev.physical_id = (None,) * len(dev.physical_id) # and 'find' the device, which will 'fix' it to match the # standalone state if rpc.call_blockdev_find(pri_node, dev): done += 1 else: warning("Failed to detach drbd %s from network, unusual case" % dev.iv_name) if not done: # no detaches succeeded (very unlikely) raise errors.OpExecError("Can't detach at least one DRBD from old node") # if we managed to detach at least one, we update all the disks of # the instance to point to the new secondary info("updating instance configuration") for dev in instance.disks: dev.logical_id = (pri_node, new_node) + dev.logical_id[2:] cfg.SetDiskID(dev, pri_node) cfg.Update(instance) # and now perform the drbd attach info("attaching primary drbds to new secondary (standalone => connected)") failures = [] for dev in instance.disks: info("attaching primary drbd for %s to new secondary node" % dev.iv_name) # since the attach is smart, it's enough to 'find' the device, # it will automatically activate the network, if the physical_id # is correct cfg.SetDiskID(dev, pri_node) if not rpc.call_blockdev_find(pri_node, dev): warning("can't attach drbd %s to new secondary!" % dev.iv_name, "please do a gnt-instance info to see the status of disks") # this can fail as the old devices are degraded and _WaitForSync # does a combined result over all disks, so we don't check its # return value self.proc.LogStep(5, steps_total, "sync devices") _WaitForSync(cfg, instance, self.proc, unlock=True) # so check manually all the devices for name, (dev, old_lvs) in iv_names.iteritems(): cfg.SetDiskID(dev, pri_node) is_degr = rpc.call_blockdev_find(pri_node, dev)[5] if is_degr: raise errors.OpExecError("DRBD device %s is degraded!" % name) self.proc.LogStep(6, steps_total, "removing old storage") for name, (dev, old_lvs) in iv_names.iteritems(): info("remove logical volumes for %s" % name) for lv in old_lvs: cfg.SetDiskID(lv, old_node) if not rpc.call_blockdev_remove(old_node, lv): warning("Can't remove LV on old secondary", hint="Cleanup stale volumes by hand") def Exec(self, feedback_fn): """Execute disk replacement. This dispatches the disk replacement to the appropriate handler. """ instance = self.instance if instance.disk_template == constants.DT_REMOTE_RAID1: fn = self._ExecRR1 elif instance.disk_template == constants.DT_DRBD8: if self.op.remote_node is None: fn = self._ExecD8DiskOnly else: fn = self._ExecD8Secondary else: raise errors.ProgrammerError("Unhandled disk replacement case") return fn(feedback_fn) class LUQueryInstanceData(NoHooksLU): """Query runtime instance data. """ _OP_REQP = ["instances"] def CheckPrereq(self): """Check prerequisites. This only checks the optional instance list against the existing names. """ if not isinstance(self.op.instances, list): raise errors.OpPrereqError("Invalid argument type 'instances'") if self.op.instances: self.wanted_instances = [] names = self.op.instances for name in names: instance = self.cfg.GetInstanceInfo(self.cfg.ExpandInstanceName(name)) if instance is None: raise errors.OpPrereqError("No such instance name '%s'" % name) self.wanted_instances.append(instance) else: self.wanted_instances = [self.cfg.GetInstanceInfo(name) for name in self.cfg.GetInstanceList()] return def _ComputeDiskStatus(self, instance, snode, dev): """Compute block device status. """ self.cfg.SetDiskID(dev, instance.primary_node) dev_pstatus = rpc.call_blockdev_find(instance.primary_node, dev) if dev.dev_type in constants.LDS_DRBD: # we change the snode then (otherwise we use the one passed in) if dev.logical_id[0] == instance.primary_node: snode = dev.logical_id[1] else: snode = dev.logical_id[0] if snode: self.cfg.SetDiskID(dev, snode) dev_sstatus = rpc.call_blockdev_find(snode, dev) else: dev_sstatus = None if dev.children: dev_children = [self._ComputeDiskStatus(instance, snode, child) for child in dev.children] else: dev_children = [] data = { "iv_name": dev.iv_name, "dev_type": dev.dev_type, "logical_id": dev.logical_id, "physical_id": dev.physical_id, "pstatus": dev_pstatus, "sstatus": dev_sstatus, "children": dev_children, } return data def Exec(self, feedback_fn): """Gather and return data""" result = {} for instance in self.wanted_instances: remote_info = rpc.call_instance_info(instance.primary_node, instance.name) if remote_info and "state" in remote_info: remote_state = "up" else: remote_state = "down" if instance.status == "down": config_state = "down" else: config_state = "up" disks = [self._ComputeDiskStatus(instance, None, device) for device in instance.disks] idict = { "name": instance.name, "config_state": config_state, "run_state": remote_state, "pnode": instance.primary_node, "snodes": instance.secondary_nodes, "os": instance.os, "memory": instance.memory, "nics": [(nic.mac, nic.ip, nic.bridge) for nic in instance.nics], "disks": disks, "network_port": instance.network_port, "vcpus": instance.vcpus, "kernel_path": instance.kernel_path, "initrd_path": instance.initrd_path, "hvm_boot_order": instance.hvm_boot_order, } result[instance.name] = idict return result class LUSetInstanceParams(LogicalUnit): """Modifies an instances's parameters. """ HPATH = "instance-modify" HTYPE = constants.HTYPE_INSTANCE _OP_REQP = ["instance_name"] def BuildHooksEnv(self): """Build hooks env. This runs on the master, primary and secondaries. """ args = dict() if self.mem: args['memory'] = self.mem if self.vcpus: args['vcpus'] = self.vcpus if self.do_ip or self.do_bridge or self.mac: if self.do_ip: ip = self.ip else: ip = self.instance.nics[0].ip if self.bridge: bridge = self.bridge else: bridge = self.instance.nics[0].bridge if self.mac: mac = self.mac else: mac = self.instance.nics[0].mac args['nics'] = [(ip, bridge, mac)] env = _BuildInstanceHookEnvByObject(self.instance, override=args) nl = [self.sstore.GetMasterNode(), self.instance.primary_node] + list(self.instance.secondary_nodes) return env, nl, nl def CheckPrereq(self): """Check prerequisites. This only checks the instance list against the existing names. """ self.mem = getattr(self.op, "mem", None) self.vcpus = getattr(self.op, "vcpus", None) self.ip = getattr(self.op, "ip", None) self.mac = getattr(self.op, "mac", None) self.bridge = getattr(self.op, "bridge", None) self.kernel_path = getattr(self.op, "kernel_path", None) self.initrd_path = getattr(self.op, "initrd_path", None) self.hvm_boot_order = getattr(self.op, "hvm_boot_order", None) all_params = [self.mem, self.vcpus, self.ip, self.bridge, self.mac, self.kernel_path, self.initrd_path, self.hvm_boot_order] if all_params.count(None) == len(all_params): raise errors.OpPrereqError("No changes submitted") if self.mem is not None: try: self.mem = int(self.mem) except ValueError, err: raise errors.OpPrereqError("Invalid memory size: %s" % str(err)) if self.vcpus is not None: try: self.vcpus = int(self.vcpus) except ValueError, err: raise errors.OpPrereqError("Invalid vcpus number: %s" % str(err)) if self.ip is not None: self.do_ip = True if self.ip.lower() == "none": self.ip = None else: if not utils.IsValidIP(self.ip): raise errors.OpPrereqError("Invalid IP address '%s'." % self.ip) else: self.do_ip = False self.do_bridge = (self.bridge is not None) if self.mac is not None: if self.cfg.IsMacInUse(self.mac): raise errors.OpPrereqError('MAC address %s already in use in cluster' % self.mac) if not utils.IsValidMac(self.mac): raise errors.OpPrereqError('Invalid MAC address %s' % self.mac) if self.kernel_path is not None: self.do_kernel_path = True if self.kernel_path == constants.VALUE_NONE: raise errors.OpPrereqError("Can't set instance to no kernel") if self.kernel_path != constants.VALUE_DEFAULT: if not os.path.isabs(self.kernel_path): raise errors.OpPrereqError("The kernel path must be an absolute" " filename") else: self.do_kernel_path = False if self.initrd_path is not None: self.do_initrd_path = True if self.initrd_path not in (constants.VALUE_NONE, constants.VALUE_DEFAULT): if not os.path.isabs(self.initrd_path): raise errors.OpPrereqError("The initrd path must be an absolute" " filename") else: self.do_initrd_path = False # boot order verification if self.hvm_boot_order is not None: if self.hvm_boot_order != constants.VALUE_DEFAULT: if len(self.hvm_boot_order.strip("acdn")) != 0: raise errors.OpPrereqError("invalid boot order specified," " must be one or more of [acdn]" " or 'default'") instance = self.cfg.GetInstanceInfo( self.cfg.ExpandInstanceName(self.op.instance_name)) if instance is None: raise errors.OpPrereqError("No such instance name '%s'" % self.op.instance_name) self.op.instance_name = instance.name self.instance = instance return def Exec(self, feedback_fn): """Modifies an instance. All parameters take effect only at the next restart of the instance. """ result = [] instance = self.instance if self.mem: instance.memory = self.mem result.append(("mem", self.mem)) if self.vcpus: instance.vcpus = self.vcpus result.append(("vcpus", self.vcpus)) if self.do_ip: instance.nics[0].ip = self.ip result.append(("ip", self.ip)) if self.bridge: instance.nics[0].bridge = self.bridge result.append(("bridge", self.bridge)) if self.mac: instance.nics[0].mac = self.mac result.append(("mac", self.mac)) if self.do_kernel_path: instance.kernel_path = self.kernel_path result.append(("kernel_path", self.kernel_path)) if self.do_initrd_path: instance.initrd_path = self.initrd_path result.append(("initrd_path", self.initrd_path)) if self.hvm_boot_order: if self.hvm_boot_order == constants.VALUE_DEFAULT: instance.hvm_boot_order = None else: instance.hvm_boot_order = self.hvm_boot_order result.append(("hvm_boot_order", self.hvm_boot_order)) self.cfg.AddInstance(instance) return result class LUQueryExports(NoHooksLU): """Query the exports list """ _OP_REQP = [] def CheckPrereq(self): """Check that the nodelist contains only existing nodes. """ self.nodes = _GetWantedNodes(self, getattr(self.op, "nodes", None)) def Exec(self, feedback_fn): """Compute the list of all the exported system images. Returns: a dictionary with the structure node->(export-list) where export-list is a list of the instances exported on that node. """ return rpc.call_export_list(self.nodes) class LUExportInstance(LogicalUnit): """Export an instance to an image in the cluster. """ HPATH = "instance-export" HTYPE = constants.HTYPE_INSTANCE _OP_REQP = ["instance_name", "target_node", "shutdown"] def BuildHooksEnv(self): """Build hooks env. This will run on the master, primary node and target node. """ env = { "EXPORT_NODE": self.op.target_node, "EXPORT_DO_SHUTDOWN": self.op.shutdown, } env.update(_BuildInstanceHookEnvByObject(self.instance)) nl = [self.sstore.GetMasterNode(), self.instance.primary_node, self.op.target_node] return env, nl, nl def CheckPrereq(self): """Check prerequisites. This checks that the instance name is a valid one. """ instance_name = self.cfg.ExpandInstanceName(self.op.instance_name) self.instance = self.cfg.GetInstanceInfo(instance_name) if self.instance is None: raise errors.OpPrereqError("Instance '%s' not found" % self.op.instance_name) # node verification dst_node_short = self.cfg.ExpandNodeName(self.op.target_node) self.dst_node = self.cfg.GetNodeInfo(dst_node_short) if self.dst_node is None: raise errors.OpPrereqError("Destination node '%s' is unknown." % self.op.target_node) self.op.target_node = self.dst_node.name def Exec(self, feedback_fn): """Export an instance to an image in the cluster. """ instance = self.instance dst_node = self.dst_node src_node = instance.primary_node if self.op.shutdown: # shutdown the instance, but not the disks if not rpc.call_instance_shutdown(src_node, instance): raise errors.OpExecError("Could not shutdown instance %s on node %s" % (instance.name, source_node)) vgname = self.cfg.GetVGName() snap_disks = [] try: for disk in instance.disks: if disk.iv_name == "sda": # new_dev_name will be a snapshot of an lvm leaf of the one we passed new_dev_name = rpc.call_blockdev_snapshot(src_node, disk) if not new_dev_name: logger.Error("could not snapshot block device %s on node %s" % (disk.logical_id[1], src_node)) else: new_dev = objects.Disk(dev_type=constants.LD_LV, size=disk.size, logical_id=(vgname, new_dev_name), physical_id=(vgname, new_dev_name), iv_name=disk.iv_name) snap_disks.append(new_dev) finally: if self.op.shutdown and instance.status == "up": if not rpc.call_instance_start(src_node, instance, None): _ShutdownInstanceDisks(instance, self.cfg) raise errors.OpExecError("Could not start instance") # TODO: check for size for dev in snap_disks: if not rpc.call_snapshot_export(src_node, dev, dst_node.name, instance): logger.Error("could not export block device %s from node %s to node %s" % (dev.logical_id[1], src_node, dst_node.name)) if not rpc.call_blockdev_remove(src_node, dev): logger.Error("could not remove snapshot block device %s from node %s" % (dev.logical_id[1], src_node)) if not rpc.call_finalize_export(dst_node.name, instance, snap_disks): logger.Error("could not finalize export for instance %s on node %s" % (instance.name, dst_node.name)) nodelist = self.cfg.GetNodeList() nodelist.remove(dst_node.name) # on one-node clusters nodelist will be empty after the removal # if we proceed the backup would be removed because OpQueryExports # substitutes an empty list with the full cluster node list. if nodelist: op = opcodes.OpQueryExports(nodes=nodelist) exportlist = self.proc.ChainOpCode(op) for node in exportlist: if instance.name in exportlist[node]: if not rpc.call_export_remove(node, instance.name): logger.Error("could not remove older export for instance %s" " on node %s" % (instance.name, node)) class TagsLU(NoHooksLU): """Generic tags LU. This is an abstract class which is the parent of all the other tags LUs. """ def CheckPrereq(self): """Check prerequisites. """ if self.op.kind == constants.TAG_CLUSTER: self.target = self.cfg.GetClusterInfo() elif self.op.kind == constants.TAG_NODE: name = self.cfg.ExpandNodeName(self.op.name) if name is None: raise errors.OpPrereqError("Invalid node name (%s)" % (self.op.name,)) self.op.name = name self.target = self.cfg.GetNodeInfo(name) elif self.op.kind == constants.TAG_INSTANCE: name = self.cfg.ExpandInstanceName(self.op.name) if name is None: raise errors.OpPrereqError("Invalid instance name (%s)" % (self.op.name,)) self.op.name = name self.target = self.cfg.GetInstanceInfo(name) else: raise errors.OpPrereqError("Wrong tag type requested (%s)" % str(self.op.kind)) class LUGetTags(TagsLU): """Returns the tags of a given object. """ _OP_REQP = ["kind", "name"] def Exec(self, feedback_fn): """Returns the tag list. """ return self.target.GetTags() class LUSearchTags(NoHooksLU): """Searches the tags for a given pattern. """ _OP_REQP = ["pattern"] def CheckPrereq(self): """Check prerequisites. This checks the pattern passed for validity by compiling it. """ try: self.re = re.compile(self.op.pattern) except re.error, err: raise errors.OpPrereqError("Invalid search pattern '%s': %s" % (self.op.pattern, err)) def Exec(self, feedback_fn): """Returns the tag list. """ cfg = self.cfg tgts = [("/cluster", cfg.GetClusterInfo())] ilist = [cfg.GetInstanceInfo(name) for name in cfg.GetInstanceList()] tgts.extend([("/instances/%s" % i.name, i) for i in ilist]) nlist = [cfg.GetNodeInfo(name) for name in cfg.GetNodeList()] tgts.extend([("/nodes/%s" % n.name, n) for n in nlist]) results = [] for path, target in tgts: for tag in target.GetTags(): if self.re.search(tag): results.append((path, tag)) return results class LUAddTags(TagsLU): """Sets a tag on a given object. """ _OP_REQP = ["kind", "name", "tags"] def CheckPrereq(self): """Check prerequisites. This checks the type and length of the tag name and value. """ TagsLU.CheckPrereq(self) for tag in self.op.tags: objects.TaggableObject.ValidateTag(tag) def Exec(self, feedback_fn): """Sets the tag. """ try: for tag in self.op.tags: self.target.AddTag(tag) except errors.TagError, err: raise errors.OpExecError("Error while setting tag: %s" % str(err)) try: self.cfg.Update(self.target) except errors.ConfigurationError: raise errors.OpRetryError("There has been a modification to the" " config file and the operation has been" " aborted. Please retry.") class LUDelTags(TagsLU): """Delete a list of tags from a given object. """ _OP_REQP = ["kind", "name", "tags"] def CheckPrereq(self): """Check prerequisites. This checks that we have the given tag. """ TagsLU.CheckPrereq(self) for tag in self.op.tags: objects.TaggableObject.ValidateTag(tag) del_tags = frozenset(self.op.tags) cur_tags = self.target.GetTags() if not del_tags <= cur_tags: diff_tags = del_tags - cur_tags diff_names = ["'%s'" % tag for tag in diff_tags] diff_names.sort() raise errors.OpPrereqError("Tag(s) %s not found" % (",".join(diff_names))) def Exec(self, feedback_fn): """Remove the tag from the object. """ for tag in self.op.tags: self.target.RemoveTag(tag) try: self.cfg.Update(self.target) except errors.ConfigurationError: raise errors.OpRetryError("There has been a modification to the" " config file and the operation has been" " aborted. Please retry.") class LUTestDelay(NoHooksLU): """Sleep for a specified amount of time. This LU sleeps on the master and/or nodes for a specified amoutn of time. """ _OP_REQP = ["duration", "on_master", "on_nodes"] def CheckPrereq(self): """Check prerequisites. This checks that we have a good list of nodes and/or the duration is valid. """ if self.op.on_nodes: self.op.on_nodes = _GetWantedNodes(self, self.op.on_nodes) def Exec(self, feedback_fn): """Do the actual sleep. """ if self.op.on_master: if not utils.TestDelay(self.op.duration): raise errors.OpExecError("Error during master delay test") if self.op.on_nodes: result = rpc.call_test_delay(self.op.on_nodes, self.op.duration) if not result: raise errors.OpExecError("Complete failure from rpc call") for node, node_result in result.items(): if not node_result: raise errors.OpExecError("Failure during rpc call to node %s," " result: %s" % (node, node_result))