constants.py

#
#

# 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 holding different constants."""

from ganeti import _autoconf

# various versions
PROTOCOL_VERSION = 20
RELEASE_VERSION = _autoconf.PACKAGE_VERSION
OS_API_V10 = 10
OS_API_V15 = 15
OS_API_VERSIONS = frozenset([OS_API_V10, OS_API_V15])
EXPORT_VERSION = 0
RAPI_VERSION = 2


# Format for CONFIG_VERSION:
#   01 03 0123 = 01030123
#   ^^ ^^ ^^^^
#   |  |  + Configuration version/revision
#   |  + Minor version
#   + Major version
#
# It stored as an integer. Make sure not to write an octal number.

# BuildVersion and SplitVersion must be in here because we can't import other
# modules. The cfgupgrade tool must be able to read and write version numbers
# and thus requires these functions. To avoid code duplication, they're kept in
# here.

def BuildVersion(major, minor, revision):
  """Calculates int version number from major, minor and revision numbers.

  Returns: int representing version number

  """
  assert isinstance(major, int)
  assert isinstance(minor, int)
  assert isinstance(revision, int)
  return (1000000 * major +
            10000 * minor +
                1 * revision)


def SplitVersion(version):
  """Splits version number stored in an int.

  Returns: tuple; (major, minor, revision)

  """
  assert isinstance(version, int)

  (major, remainder) = divmod(version, 1000000)
  (minor, revision) = divmod(remainder, 10000)

  return (major, minor, revision)


CONFIG_MAJOR = int(_autoconf.VERSION_MAJOR)
CONFIG_MINOR = int(_autoconf.VERSION_MINOR)
CONFIG_REVISION = 0
CONFIG_VERSION = BuildVersion(CONFIG_MAJOR, CONFIG_MINOR, CONFIG_REVISION)

# file paths
DATA_DIR = _autoconf.LOCALSTATEDIR + "/lib/ganeti"
RUN_DIR = _autoconf.LOCALSTATEDIR + "/run"
RUN_GANETI_DIR = RUN_DIR + "/ganeti"
BDEV_CACHE_DIR = RUN_GANETI_DIR + "/bdev-cache"
DISK_LINKS_DIR = RUN_GANETI_DIR + "/instance-disks"
RUN_DIRS_MODE = 0755
SOCKET_DIR = RUN_GANETI_DIR + "/socket"
SOCKET_DIR_MODE = 0700
# keep RUN_GANETI_DIR first here, to make sure all get created when the node
# daemon is started (this takes care of RUN_DIR being tmpfs)
SUB_RUN_DIRS = [ RUN_GANETI_DIR, BDEV_CACHE_DIR, DISK_LINKS_DIR ]
LOCK_DIR = _autoconf.LOCALSTATEDIR + "/lock"
SSCONF_LOCK_FILE = LOCK_DIR + "/ganeti-ssconf.lock"
CLUSTER_CONF_FILE = DATA_DIR + "/config.data"
SSL_CERT_FILE = DATA_DIR + "/server.pem"
RAPI_CERT_FILE = DATA_DIR + "/rapi.pem"
HMAC_CLUSTER_KEY = DATA_DIR + "/hmac.key"
WATCHER_STATEFILE = DATA_DIR + "/watcher.data"
WATCHER_PAUSEFILE = DATA_DIR + "/watcher.pause"
INSTANCE_UPFILE = RUN_GANETI_DIR + "/instance-status"
SSH_KNOWN_HOSTS_FILE = DATA_DIR + "/known_hosts"
RAPI_USERS_FILE = DATA_DIR + "/rapi_users"
QUEUE_DIR = DATA_DIR + "/queue"
ETC_HOSTS = "/etc/hosts"
DEFAULT_FILE_STORAGE_DIR = _autoconf.FILE_STORAGE_DIR
SYSCONFDIR = _autoconf.SYSCONFDIR
TOOLSDIR = _autoconf.TOOLSDIR
CONF_DIR = SYSCONFDIR + "/ganeti"

MASTER_SOCKET = SOCKET_DIR + "/ganeti-master"

NODE_INITD_SCRIPT = SYSCONFDIR + "/init.d/ganeti"

NODED = "ganeti-noded"
CONFD = "ganeti-confd"
RAPI = "ganeti-rapi"
MASTERD = "ganeti-masterd"

MULTITHREADED_DAEMONS = frozenset([MASTERD])

DAEMONS_SSL = {
  # daemon-name: (default-cert-path, default-key-path)
  NODED: (SSL_CERT_FILE, SSL_CERT_FILE),
  RAPI: (RAPI_CERT_FILE, RAPI_CERT_FILE),
}

DAEMONS_PORTS = {
  # daemon-name: ("proto", "default-port")
  NODED: ("tcp", 1811),
  CONFD: ("udp", 1814),
  RAPI: ("tcp", 5080),
}
DEFAULT_NODED_PORT = DAEMONS_PORTS[NODED][1]
DEFAULT_CONFD_PORT = DAEMONS_PORTS[CONFD][1]
DEFAULT_RAPI_PORT = DAEMONS_PORTS[RAPI][1]

FIRST_DRBD_PORT = 11000
LAST_DRBD_PORT = 14999
MASTER_SCRIPT = "ganeti-master"

LOG_DIR = _autoconf.LOCALSTATEDIR + "/log/ganeti/"
DAEMONS_LOGFILES = {
  # "daemon-name": "logfile"
  NODED: LOG_DIR + "node-daemon.log",
  CONFD: LOG_DIR + "conf-daemon.log",
  RAPI: LOG_DIR + "rapi-daemon.log",
  MASTERD: LOG_DIR + "master-daemon.log",
  }
LOG_OS_DIR = LOG_DIR + "os"
LOG_WATCHER = LOG_DIR + "watcher.log"
LOG_COMMANDS = LOG_DIR + "commands.log"
LOG_BURNIN = LOG_DIR + "burnin.log"

OS_SEARCH_PATH = _autoconf.OS_SEARCH_PATH
EXPORT_DIR = _autoconf.EXPORT_DIR

EXPORT_CONF_FILE = "config.ini"

XEN_KERNEL = _autoconf.XEN_KERNEL
XEN_INITRD = _autoconf.XEN_INITRD

KVM_PATH = _autoconf.KVM_PATH
SOCAT_PATH = _autoconf.SOCAT_PATH
KVM_MIGRATION_PORT = _autoconf.KVM_MIGRATION_PORT

VALUE_DEFAULT = "default"
VALUE_AUTO = "auto"
VALUE_GENERATE = "generate"
VALUE_NONE = "none"
VALUE_TRUE = "true"
VALUE_FALSE = "false"

# hooks-related constants
HOOKS_BASE_DIR = CONF_DIR + "/hooks"
HOOKS_PHASE_PRE = "pre"
HOOKS_PHASE_POST = "post"
HOOKS_NAME_CFGUPDATE = "config-update"
HOOKS_VERSION = 2

# hooks subject type (what object type does the LU deal with)
HTYPE_CLUSTER = "CLUSTER"
HTYPE_NODE = "NODE"
HTYPE_INSTANCE = "INSTANCE"

HKR_SKIP = 0
HKR_FAIL = 1
HKR_SUCCESS = 2

# Storage types
ST_FILE = "file"
ST_LVM_PV = "lvm-pv"
ST_LVM_VG = "lvm-vg"

# Storage fields
SF_NAME = "name"
SF_SIZE = "size"
SF_FREE = "free"
SF_USED = "used"
SF_ALLOCATABLE = "allocatable"

# Storage operations
SO_FIX_CONSISTENCY = "fix-consistency"

# Available fields per storage type
VALID_STORAGE_FIELDS = {
  ST_FILE: frozenset([SF_NAME, SF_USED, SF_FREE]),
  ST_LVM_PV: frozenset([SF_NAME, SF_SIZE, SF_USED, SF_FREE, SF_ALLOCATABLE]),
  ST_LVM_VG: frozenset([SF_NAME, SF_SIZE]),
  }

MODIFIABLE_STORAGE_FIELDS = {
  ST_LVM_PV: frozenset([SF_ALLOCATABLE]),
  }

VALID_STORAGE_OPERATIONS = {
  ST_LVM_VG: frozenset([SO_FIX_CONSISTENCY]),
  }

# Local disk status
# Note: Code depends on LDS_OKAY < LDS_UNKNOWN < LDS_FAULTY
(LDS_OKAY,
 LDS_UNKNOWN,
 LDS_FAULTY) = range(1, 4)

# disk template types
DT_DISKLESS = "diskless"
DT_PLAIN = "plain"
DT_DRBD8 = "drbd"
DT_FILE = "file"

# the set of network-mirrored disk templates
DTS_NET_MIRROR = frozenset([DT_DRBD8])

# the set of non-lvm-based disk templates
DTS_NOT_LVM = frozenset([DT_DISKLESS, DT_FILE])

# logical disk types
LD_LV = "lvm"
LD_DRBD8 = "drbd8"
LD_FILE = "file"
LDS_BLOCK = frozenset([LD_LV, LD_DRBD8])

# drbd constants
DRBD_HMAC_ALG = "md5"
DRBD_NET_PROTOCOL = "C"

# file backend driver
FD_LOOP = "loop"
FD_BLKTAP = "blktap"

# the set of drbd-like disk types
LDS_DRBD = frozenset([LD_DRBD8])

# disk access mode
DISK_RDONLY = "ro"
DISK_RDWR = "rw"
DISK_ACCESS_SET = frozenset([DISK_RDONLY, DISK_RDWR])

# disk replacement mode
REPLACE_DISK_PRI = "replace_on_primary"    # replace disks on primary
REPLACE_DISK_SEC = "replace_on_secondary"  # replace disks on secondary
REPLACE_DISK_CHG = "replace_new_secondary" # change secondary node
REPLACE_DISK_AUTO = "replace_auto"

# lock recalculate mode
LOCKS_REPLACE = 'replace'
LOCKS_APPEND = 'append'

# instance creation modes
INSTANCE_CREATE = "create"
INSTANCE_IMPORT = "import"

DISK_TEMPLATES = frozenset([DT_DISKLESS, DT_PLAIN,
                            DT_DRBD8, DT_FILE])

FILE_DRIVER = frozenset([FD_LOOP, FD_BLKTAP])

# import/export config options
INISECT_EXP = "export"
INISECT_INS = "instance"

# dynamic device modification

DDM_ADD = 'add'
DDM_REMOVE = 'remove'

# common exit codes
EXIT_SUCCESS = 0
EXIT_FAILURE = 1
EXIT_NOTCLUSTER = 5
EXIT_NOTMASTER = 11
EXIT_NODESETUP_ERROR = 12
EXIT_CONFIRMATION = 13 # need user confirmation
EXIT_NOTCANDIDATE = 14

# tags
TAG_CLUSTER = "cluster"
TAG_NODE = "node"
TAG_INSTANCE = "instance"
MAX_TAG_LEN = 128
MAX_TAGS_PER_OBJ = 4096

# others
DEFAULT_BRIDGE = "xen-br0"
SYNC_SPEED = 60 * 1024
LOCALHOST_IP_ADDRESS = "127.0.0.1"
TCP_PING_TIMEOUT = 10
GANETI_RUNAS = "root"
DEFAULT_VG = "xenvg"
BIND_ADDRESS_GLOBAL = "0.0.0.0"
MIN_VG_SIZE = 20480
DEFAULT_MAC_PREFIX = "aa:00:00"
LVM_STRIPECOUNT = _autoconf.LVM_STRIPECOUNT

# RPC constants
(RPC_ENCODING_NONE,
 RPC_ENCODING_ZLIB_BASE64) = range(2)

# os related constants
OS_SCRIPT_CREATE = 'create'
OS_SCRIPT_IMPORT = 'import'
OS_SCRIPT_EXPORT = 'export'
OS_SCRIPT_RENAME = 'rename'
OS_SCRIPTS = frozenset([OS_SCRIPT_CREATE, OS_SCRIPT_IMPORT,
                        OS_SCRIPT_EXPORT, OS_SCRIPT_RENAME])

# ssh constants
SSH_INITD_SCRIPT = _autoconf.SSH_INITD_SCRIPT
SSH_CONFIG_DIR = "/etc/ssh/"
SSH_HOST_DSA_PRIV = SSH_CONFIG_DIR + "ssh_host_dsa_key"
SSH_HOST_DSA_PUB = SSH_HOST_DSA_PRIV + ".pub"
SSH_HOST_RSA_PRIV = SSH_CONFIG_DIR + "ssh_host_rsa_key"
SSH_HOST_RSA_PUB = SSH_HOST_RSA_PRIV + ".pub"
SSH = "ssh"
SCP = "scp"

# reboot types
INSTANCE_REBOOT_SOFT = "soft"
INSTANCE_REBOOT_HARD = "hard"
INSTANCE_REBOOT_FULL = "full"

REBOOT_TYPES = frozenset([INSTANCE_REBOOT_SOFT,
                          INSTANCE_REBOOT_HARD,
                          INSTANCE_REBOOT_FULL])

VTYPE_STRING = 'string'
VTYPE_BOOL = 'bool'
VTYPE_SIZE = 'size' # size, in MiBs
VTYPE_INT = 'int'
ENFORCEABLE_TYPES = frozenset([
                      VTYPE_STRING,
                      VTYPE_BOOL,
                      VTYPE_SIZE,
                      VTYPE_INT,
                      ])

# HV parameter names (global namespace)
HV_BOOT_ORDER = "boot_order"
HV_CDROM_IMAGE_PATH = "cdrom_image_path"
HV_NIC_TYPE = "nic_type"
HV_DISK_TYPE = "disk_type"
HV_VNC_BIND_ADDRESS = "vnc_bind_address"
HV_VNC_TLS = "vnc_tls"
HV_VNC_X509 = "vnc_x509_path"
HV_VNC_X509_VERIFY = "vnc_x509_verify"
HV_ACPI = "acpi"
HV_PAE = "pae"
HV_KERNEL_ARGS = "kernel_args"
HV_KERNEL_PATH = "kernel_path"
HV_INITRD_PATH = "initrd_path"
HV_ROOT_PATH = "root_path"
HV_SERIAL_CONSOLE = "serial_console"
HV_USB_MOUSE = "usb_mouse"
HV_DEVICE_MODEL = "device_model"
HV_INIT_SCRIPT = "init_script"

HVS_PARAMETER_TYPES = {
  HV_BOOT_ORDER: VTYPE_STRING,
  HV_CDROM_IMAGE_PATH: VTYPE_STRING,
  HV_NIC_TYPE: VTYPE_STRING,
  HV_DISK_TYPE: VTYPE_STRING,
  HV_VNC_BIND_ADDRESS: VTYPE_STRING,
  HV_VNC_TLS: VTYPE_BOOL,
  HV_VNC_X509: VTYPE_STRING,
  HV_VNC_X509_VERIFY: VTYPE_BOOL,
  HV_ACPI: VTYPE_BOOL,
  HV_PAE: VTYPE_BOOL,
  HV_KERNEL_PATH: VTYPE_STRING,
  HV_KERNEL_ARGS: VTYPE_STRING,
  HV_INITRD_PATH: VTYPE_STRING,
  HV_ROOT_PATH: VTYPE_STRING,
  HV_SERIAL_CONSOLE: VTYPE_BOOL,
  HV_USB_MOUSE: VTYPE_STRING,
  HV_DEVICE_MODEL: VTYPE_STRING,
  HV_INIT_SCRIPT: VTYPE_STRING,
  }

HVS_PARAMETERS = frozenset(HVS_PARAMETER_TYPES.keys())

# BE parameter names
BE_MEMORY = "memory"
BE_VCPUS = "vcpus"
BE_AUTO_BALANCE = "auto_balance"

BES_PARAMETER_TYPES = {
    BE_MEMORY: VTYPE_SIZE,
    BE_VCPUS: VTYPE_INT,
    BE_AUTO_BALANCE: VTYPE_BOOL,
    }

BES_PARAMETERS = frozenset(BES_PARAMETER_TYPES.keys())

# Instance Parameters Profile
PP_DEFAULT = "default"

NIC_MODE = "mode"
NIC_LINK = "link"

NIC_MODE_BRIDGED = "bridged"
NIC_MODE_ROUTED = "routed"

NIC_VALID_MODES = frozenset([NIC_MODE_BRIDGED, NIC_MODE_ROUTED])

NICS_PARAMETER_TYPES = {
    NIC_MODE: VTYPE_STRING,
    NIC_LINK: VTYPE_STRING,
    }

NICS_PARAMETERS = frozenset(NICS_PARAMETER_TYPES.keys())

# Hypervisor constants
HT_XEN_PVM = "xen-pvm"
HT_FAKE = "fake"
HT_XEN_HVM = "xen-hvm"
HT_KVM = "kvm"
HT_CHROOT = "chroot"
HYPER_TYPES = frozenset([HT_XEN_PVM, HT_FAKE, HT_XEN_HVM, HT_KVM, HT_CHROOT])
HTS_REQ_PORT = frozenset([HT_XEN_HVM, HT_KVM])

VNC_BASE_PORT = 5900
VNC_PASSWORD_FILE = CONF_DIR + "/vnc-cluster-password"
VNC_DEFAULT_BIND_ADDRESS = '0.0.0.0'

# NIC types
HT_NIC_RTL8139 = "rtl8139"
HT_NIC_NE2K_PCI = "ne2k_pci"
HT_NIC_NE2K_ISA = "ne2k_isa"
HT_NIC_I82551 = "i82551"
HT_NIC_I85557B = "i82557b"
HT_NIC_I8259ER = "i82559er"
HT_NIC_PCNET = "pcnet"
HT_NIC_E1000 = "e1000"
HT_NIC_PARAVIRTUAL = HT_DISK_PARAVIRTUAL = "paravirtual"

HT_HVM_VALID_NIC_TYPES = frozenset([HT_NIC_RTL8139, HT_NIC_NE2K_PCI,
                                    HT_NIC_NE2K_ISA, HT_NIC_PARAVIRTUAL])
HT_KVM_VALID_NIC_TYPES = frozenset([HT_NIC_RTL8139, HT_NIC_NE2K_PCI,
                                    HT_NIC_NE2K_ISA, HT_NIC_I82551,
                                    HT_NIC_I85557B, HT_NIC_I8259ER,
                                    HT_NIC_PCNET, HT_NIC_E1000,
                                    HT_NIC_PARAVIRTUAL])
# Disk types
HT_DISK_IOEMU = "ioemu"
HT_DISK_IDE = "ide"
HT_DISK_SCSI = "scsi"
HT_DISK_SD = "sd"
HT_DISK_MTD = "mtd"
HT_DISK_PFLASH = "pflash"

HT_HVM_VALID_DISK_TYPES = frozenset([HT_DISK_PARAVIRTUAL, HT_DISK_IOEMU])
HT_KVM_VALID_DISK_TYPES = frozenset([HT_DISK_PARAVIRTUAL, HT_DISK_IDE,
                                     HT_DISK_SCSI, HT_DISK_SD, HT_DISK_MTD,
                                     HT_DISK_PFLASH])

# Mouse types:
HT_MOUSE_MOUSE = "mouse"
HT_MOUSE_TABLET = "tablet"

HT_KVM_VALID_MOUSE_TYPES = frozenset([HT_MOUSE_MOUSE, HT_MOUSE_TABLET])

# Boot order
HT_BO_CDROM = "cdrom"
HT_BO_DISK = "disk"
HT_BO_NETWORK = "network"

HT_KVM_VALID_BO_TYPES = frozenset([HT_BO_CDROM, HT_BO_DISK, HT_BO_NETWORK])

# Cluster Verify steps
VERIFY_NPLUSONE_MEM = 'nplusone_mem'
VERIFY_OPTIONAL_CHECKS = frozenset([VERIFY_NPLUSONE_MEM])

# Node verify constants
NV_FILELIST = "filelist"
NV_HVINFO = "hvinfo"
NV_HYPERVISOR = "hypervisor"
NV_INSTANCELIST = "instancelist"
NV_LVLIST = "lvlist"
NV_NODELIST = "nodelist"
NV_NODENETTEST = "node-net-test"
NV_VERSION = "version"
NV_VGLIST = "vglist"
NV_DRBDLIST = "drbd-list"

# Allocator framework constants
IALLOCATOR_VERSION = 2
IALLOCATOR_DIR_IN = "in"
IALLOCATOR_DIR_OUT = "out"
IALLOCATOR_MODE_ALLOC = "allocate"
IALLOCATOR_MODE_RELOC = "relocate"
IALLOCATOR_SEARCH_PATH = _autoconf.IALLOCATOR_SEARCH_PATH

# Job queue
JOB_QUEUE_VERSION = 1
JOB_QUEUE_LOCK_FILE = QUEUE_DIR + "/lock"
JOB_QUEUE_VERSION_FILE = QUEUE_DIR + "/version"
JOB_QUEUE_SERIAL_FILE = QUEUE_DIR + "/serial"
JOB_QUEUE_ARCHIVE_DIR = QUEUE_DIR + "/archive"
JOB_QUEUE_DRAIN_FILE = QUEUE_DIR + "/drain"
JOB_QUEUE_SIZE_HARD_LIMIT = 5000
JOB_QUEUE_SIZE_SOFT_LIMIT = JOB_QUEUE_SIZE_HARD_LIMIT * 0.8

JOB_ID_TEMPLATE = r"\d+"

# unchanged job return
JOB_NOTCHANGED = "nochange"

# Job status
JOB_STATUS_QUEUED = "queued"
JOB_STATUS_WAITLOCK = "waiting"
JOB_STATUS_CANCELING = "canceling"
JOB_STATUS_RUNNING = "running"
JOB_STATUS_CANCELED = "canceled"
JOB_STATUS_SUCCESS = "success"
JOB_STATUS_ERROR = "error"

# OpCode status
# not yet finalized
OP_STATUS_QUEUED = "queued"
OP_STATUS_WAITLOCK = "waiting"
OP_STATUS_CANCELING = "canceling"
OP_STATUS_RUNNING = "running"
# finalized
OP_STATUS_CANCELED = "canceled"
OP_STATUS_SUCCESS = "success"
OP_STATUS_ERROR = "error"
OPS_FINALIZED = frozenset([OP_STATUS_CANCELED,
                           OP_STATUS_SUCCESS,
                           OP_STATUS_ERROR])

# Execution log types
ELOG_MESSAGE = "message"
ELOG_PROGRESS = "progress"

# max dynamic devices
MAX_NICS = 8
MAX_DISKS = 16

# SSCONF keys
SS_CLUSTER_NAME = "cluster_name"
SS_CLUSTER_TAGS = "cluster_tags"
SS_FILE_STORAGE_DIR = "file_storage_dir"
SS_MASTER_CANDIDATES = "master_candidates"
SS_MASTER_CANDIDATES_IPS = "master_candidates_ips"
SS_MASTER_IP = "master_ip"
SS_MASTER_NETDEV = "master_netdev"
SS_MASTER_NODE = "master_node"
SS_NODE_LIST = "node_list"
SS_NODE_PRIMARY_IPS = "node_primary_ips"
SS_NODE_SECONDARY_IPS = "node_secondary_ips"
SS_OFFLINE_NODES = "offline_nodes"
SS_ONLINE_NODES = "online_nodes"
SS_INSTANCE_LIST = "instance_list"
SS_RELEASE_VERSION = "release_version"

# cluster wide default parameters
DEFAULT_ENABLED_HYPERVISOR = HT_XEN_PVM

HVC_DEFAULTS = {
  HT_XEN_PVM: {
    HV_KERNEL_PATH: "/boot/vmlinuz-2.6-xenU",
    HV_INITRD_PATH: '',
    HV_ROOT_PATH: '/dev/sda1',
    HV_KERNEL_ARGS: 'ro',
    },
  HT_XEN_HVM: {
    HV_BOOT_ORDER: "cd",
    HV_CDROM_IMAGE_PATH: '',
    HV_NIC_TYPE: HT_NIC_RTL8139,
    HV_DISK_TYPE: HT_DISK_PARAVIRTUAL,
    HV_VNC_BIND_ADDRESS: '0.0.0.0',
    HV_ACPI: True,
    HV_PAE: True,
    HV_KERNEL_PATH: "/usr/lib/xen/boot/hvmloader",
    HV_DEVICE_MODEL: "/usr/lib/xen/bin/qemu-dm",
    },
  HT_KVM: {
    HV_KERNEL_PATH: "/boot/vmlinuz-2.6-kvmU",
    HV_INITRD_PATH: '',
    HV_KERNEL_ARGS: 'ro',
    HV_ROOT_PATH: '/dev/vda1',
    HV_ACPI: True,
    HV_SERIAL_CONSOLE: True,
    HV_VNC_BIND_ADDRESS: '',
    HV_VNC_TLS: False,
    HV_VNC_X509: '',
    HV_VNC_X509_VERIFY: False,
    HV_CDROM_IMAGE_PATH: '',
    HV_BOOT_ORDER: HT_BO_DISK,
    HV_NIC_TYPE: HT_NIC_PARAVIRTUAL,
    HV_DISK_TYPE: HT_DISK_PARAVIRTUAL,
    HV_USB_MOUSE: '',
    },
  HT_FAKE: {
    },
  HT_CHROOT: {
    HV_INIT_SCRIPT: "/ganeti-chroot",
    },
  }

BEC_DEFAULTS = {
  BE_MEMORY: 128,
  BE_VCPUS: 1,
  BE_AUTO_BALANCE: True,
  }

NICC_DEFAULTS = {
  NIC_MODE: NIC_MODE_BRIDGED,
  NIC_LINK: DEFAULT_BRIDGE,
  }

MASTER_POOL_SIZE_DEFAULT = 10

CONFD_PROTOCOL_VERSION = 1

CONFD_REQ_PING = 0
CONFD_REQ_NODE_ROLE_BYNAME = 1
CONFD_REQ_NODE_PIP_BY_INSTANCE_IP = 2
CONFD_REQ_CLUSTER_MASTER = 3
CONFD_REQ_NODE_PIP_LIST = 4
CONFD_REQ_MC_PIP_LIST = 5
CONFD_REQ_INSTANCES_IPS_LIST = 6

CONFD_REQS = frozenset([
  CONFD_REQ_PING,
  CONFD_REQ_NODE_ROLE_BYNAME,
  CONFD_REQ_NODE_PIP_BY_INSTANCE_IP,
  CONFD_REQ_CLUSTER_MASTER,
  CONFD_REQ_NODE_PIP_LIST,
  CONFD_REQ_MC_PIP_LIST,
  CONFD_REQ_INSTANCES_IPS_LIST,
  ])

CONFD_REPL_STATUS_OK = 0
CONFD_REPL_STATUS_ERROR = 1
CONFD_REPL_STATUS_NOTIMPLEMENTED = 2

CONFD_REPL_STATUSES = frozenset([
  CONFD_REPL_STATUS_OK,
  CONFD_REPL_STATUS_ERROR,
  CONFD_REPL_STATUS_NOTIMPLEMENTED,
  ])

(CONFD_NODE_ROLE_MASTER,
 CONFD_NODE_ROLE_CANDIDATE,
 CONFD_NODE_ROLE_OFFLINE,
 CONFD_NODE_ROLE_DRAINED,
 CONFD_NODE_ROLE_REGULAR,
 ) = range(5)

# A few common errors for confd
CONFD_ERROR_UNKNOWN_ENTRY = 1
CONFD_ERROR_INTERNAL = 2

# Each request is "salted" by the current timestamp.
# This constants decides how many seconds of skew to accept.
# TODO: make this a default and allow the value to be more configurable
CONFD_MAX_CLOCK_SKEW = 300

# When we haven't reloaded the config for more than this amount of seconds, we
# force a test to see if inotify is betraying us.
CONFD_CONFIG_RELOAD_TIMEOUT = 60

# If we receive more than one update in this amount of seconds, we move to
# polling every RATELIMIT seconds, rather than relying on inotify, to be able
# to serve more requests.
CONFD_CONFIG_RELOAD_RATELIMIT = 2

# Magic number prepended to all confd queries.
# This allows us to distinguish different types of confd protocols and handle
# them. For example by changing this we can move the whole payload to be
# compressed, or move away from json.
CONFD_MAGIC_FOURCC = 'plj0'

# By default a confd request is sent to the minimum between this number and all
# MCs. 6 was chosen because even in the case of a disastrous 50% response rate,
# we should have enough answers to be able to compare more than one.
CONFD_DEFAULT_REQ_COVERAGE = 6

# Timeout in seconds to expire pending query request in the confd client
# library. We don't actually expect any answer more than 10 seconds after we
# sent a request.
CONFD_CLIENT_EXPIRE_TIMEOUT = 10

# Maximum UDP datagram size.
# On IPv4: 64K - 20 (ip header size) - 8 (udp header size) = 65507
# On IPv6: 64K - 40 (ip6 header size) - 8 (udp header size) = 65487
#   (assuming we can't use jumbo frames)
# We just set this to 60K, which should be enough
MAX_UDP_DATA_SIZE = 61440