#!/usr/bin/python -u
#

# Copyright (C) 2007, 2008, 2009, 2010, 2011 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.


"""Script for doing QA on Ganeti.

"""

# pylint: disable-msg=C0103
# due to invalid name

import sys
import datetime
import optparse

import qa_cluster
import qa_config
import qa_daemon
import qa_env
import qa_group
import qa_instance
import qa_node
import qa_os
import qa_rapi
import qa_tags
import qa_utils

from ganeti import utils
from ganeti import rapi
from ganeti import constants

import ganeti.rapi.client # pylint: disable-msg=W0611


def _FormatHeader(line, end=72):
  """Fill a line up to the end column.

  """
  line = "---- " + line + " "
  line += "-" * (end-len(line))
  line = line.rstrip()
  return line


def _DescriptionOf(fn):
  """Computes the description of an item.

  """
  if fn.__doc__:
    desc = fn.__doc__.splitlines()[0].strip()
  else:
    desc = "%r" % fn

  return desc.rstrip(".")

def RunTest(fn, *args):
  """Runs a test after printing a header.

  """

  tstart = datetime.datetime.now()

  desc = _DescriptionOf(fn)

  print
  print _FormatHeader("%s start %s" % (tstart, desc))

  try:
    retval = fn(*args)
    return retval
  finally:
    tstop = datetime.datetime.now()
    tdelta = tstop - tstart
    print _FormatHeader("%s time=%s %s" % (tstop, tdelta, desc))


def RunTestIf(testnames, fn, *args):
  """Runs a test conditionally.

  @param testnames: either a single test name in the configuration
      file, or a list of testnames (which will be AND-ed together)

  """
  if qa_config.TestEnabled(testnames):
    RunTest(fn, *args)
  else:
    tstart = datetime.datetime.now()
    desc = _DescriptionOf(fn)
    print _FormatHeader("%s skipping %s, test(s) %s disabled" %
                        (tstart, desc, testnames))


def RunEnvTests():
  """Run several environment tests.

  """
  RunTestIf("env", qa_env.TestSshConnection)
  RunTestIf("env", qa_env.TestIcmpPing)
  RunTestIf("env", qa_env.TestGanetiCommands)


def SetupCluster(rapi_user, rapi_secret):
  """Initializes the cluster.

  @param rapi_user: Login user for RAPI
  @param rapi_secret: Login secret for RAPI

  """
  RunTestIf("create-cluster", qa_cluster.TestClusterInit,
            rapi_user, rapi_secret)

  # Test on empty cluster
  RunTestIf("node-list", qa_node.TestNodeList)
  RunTestIf("instance-list", qa_instance.TestInstanceList)

  RunTestIf("create-cluster", qa_node.TestNodeAddAll)
  if not qa_config.TestEnabled("create-cluster"):
    # consider the nodes are already there
    qa_node.MarkNodeAddedAll()

  RunTestIf("test-jobqueue", qa_cluster.TestJobqueue)

  # enable the watcher (unconditionally)
  RunTest(qa_daemon.TestResumeWatcher)

  RunTestIf("node-list", qa_node.TestNodeList)

  # Test listing fields
  RunTestIf("node-list", qa_node.TestNodeListFields)
  RunTestIf("instance-list", qa_instance.TestInstanceListFields)

  RunTestIf("node-info", qa_node.TestNodeInfo)


def RunClusterTests():
  """Runs tests related to gnt-cluster.

  """
  for test, fn in [
    ("cluster-renew-crypto", qa_cluster.TestClusterRenewCrypto),
    ("cluster-verify", qa_cluster.TestClusterVerify),
    ("cluster-reserved-lvs", qa_cluster.TestClusterReservedLvs),
    # TODO: add more cluster modify tests
    ("cluster-modify", qa_cluster.TestClusterModifyBe),
    ("cluster-rename", qa_cluster.TestClusterRename),
    ("cluster-info", qa_cluster.TestClusterVersion),
    ("cluster-info", qa_cluster.TestClusterInfo),
    ("cluster-info", qa_cluster.TestClusterGetmaster),
    ("cluster-copyfile", qa_cluster.TestClusterCopyfile),
    ("cluster-command", qa_cluster.TestClusterCommand),
    ("cluster-burnin", qa_cluster.TestClusterBurnin),
    ("cluster-master-failover", qa_cluster.TestClusterMasterFailover),
    ("cluster-oob", qa_cluster.TestClusterOob),
    ("rapi", qa_rapi.TestVersion),
    ("rapi", qa_rapi.TestEmptyCluster),
    ]:
    RunTestIf(test, fn)


def RunOsTests():
  """Runs all tests related to gnt-os.

  """
  for fn in [
    qa_os.TestOsList,
    qa_os.TestOsDiagnose,
    qa_os.TestOsValid,
    qa_os.TestOsInvalid,
    qa_os.TestOsPartiallyValid,
    qa_os.TestOsModifyValid,
    qa_os.TestOsModifyInvalid,
    qa_os.TestOsStates,
    ]:
    RunTestIf("os", fn)


def RunCommonInstanceTests(instance):
  """Runs a few tests that are common to all disk types.

  """
  RunTestIf("instance-shutdown", qa_instance.TestInstanceShutdown, instance)
  RunTestIf(["instance-shutdown", "instance-console", "rapi"],
            qa_rapi.TestRapiStoppedInstanceConsole, instance)
  RunTestIf("instance-shutdown", qa_instance.TestInstanceStartup, instance)

  RunTestIf("instance-list", qa_instance.TestInstanceList)

  RunTestIf("instance-info", qa_instance.TestInstanceInfo, instance)

  RunTestIf("instance-modify", qa_instance.TestInstanceModify, instance)
  RunTestIf(["instance-modify", "rapi"],
            qa_rapi.TestRapiInstanceModify, instance)

  RunTestIf("instance-console", qa_instance.TestInstanceConsole, instance)
  RunTestIf(["instance-console", "rapi"],
            qa_rapi.TestRapiInstanceConsole, instance)

  RunTestIf("instance-reinstall", qa_instance.TestInstanceShutdown, instance)
  RunTestIf("instance-reinstall", qa_instance.TestInstanceReinstall, instance)
  RunTestIf(["instance-reinstall", "rapi"],
            qa_rapi.TestRapiInstanceReinstall, instance)
  RunTestIf("instance-reinstall", qa_instance.TestInstanceStartup, instance)

  RunTestIf("instance-reboot", qa_instance.TestInstanceReboot, instance)

  if qa_config.TestEnabled('instance-rename'):
    rename_source = instance["name"]
    rename_target = qa_config.get("rename", None)
    RunTest(qa_instance.TestInstanceShutdown, instance)
    # perform instance rename to the same name
    RunTest(qa_instance.TestInstanceRename, rename_source, rename_source)
    RunTestIf("rapi", qa_rapi.TestRapiInstanceRename,
              rename_source, rename_source)
    if rename_target is not None:
      # perform instance rename to a different name, if we have one configured
      RunTest(qa_instance.TestInstanceRename, rename_source, rename_target)
      RunTest(qa_instance.TestInstanceRename, rename_target, rename_source)
      RunTestIf("rapi", qa_rapi.TestRapiInstanceRename,
                rename_source, rename_target)
      RunTestIf("rapi", qa_rapi.TestRapiInstanceRename,
                rename_target, rename_source)
    RunTest(qa_instance.TestInstanceStartup, instance)

  RunTestIf("tags", qa_tags.TestInstanceTags, instance)

  RunTestIf("cluster-verify", qa_cluster.TestClusterVerify)

  RunTestIf("rapi", qa_rapi.TestInstance, instance)

  # Lists instances, too
  RunTestIf("node-list", qa_node.TestNodeList)


def RunCommonNodeTests():
  """Run a few common node tests.

  """
  RunTestIf("node-volumes", qa_node.TestNodeVolumes)
  RunTestIf("node-storage", qa_node.TestNodeStorage)
  RunTestIf("node-oob", qa_node.TestOutOfBand)


def RunGroupListTests():
  """Run tests for listing node groups.

  """
  RunTestIf("group-list", qa_group.TestGroupList)
  RunTestIf("group-list", qa_group.TestGroupListFields)


def RunGroupRwTests():
  """Run tests for adding/removing/renaming groups.

  """
  RunTestIf("group-rwops", qa_group.TestGroupAddRemoveRename)
  RunTestIf("group-rwops", qa_group.TestGroupAddWithOptions)
  RunTestIf("group-rwops", qa_group.TestGroupModify)
  RunTestIf(["group-rwops", "rapi"], qa_rapi.TestRapiNodeGroups)


def RunExportImportTests(instance, pnode, snode):
  """Tries to export and import the instance.

  @param pnode: current primary node of the instance
  @param snode: current secondary node of the instance, if any,
      otherwise None

  """
  if qa_config.TestEnabled('instance-export'):
    RunTest(qa_instance.TestInstanceExportNoTarget, instance)

    expnode = qa_config.AcquireNode(exclude=pnode)
    try:
      name = RunTest(qa_instance.TestInstanceExport, instance, expnode)

      RunTest(qa_instance.TestBackupList, expnode)

      if qa_config.TestEnabled('instance-import'):
        newinst = qa_config.AcquireInstance()
        try:
          RunTest(qa_instance.TestInstanceImport, pnode, newinst,
                  expnode, name)
          RunTest(qa_instance.TestInstanceRemove, newinst)
        finally:
          qa_config.ReleaseInstance(newinst)
    finally:
      qa_config.ReleaseNode(expnode)

  if qa_config.TestEnabled(["rapi", "inter-cluster-instance-move"]):
    newinst = qa_config.AcquireInstance()
    try:
      if snode is None:
        excl = [pnode]
      else:
        excl = [pnode, snode]
      tnode = qa_config.AcquireNode(exclude=excl)
      try:
        RunTest(qa_rapi.TestInterClusterInstanceMove, instance, newinst,
                pnode, snode, tnode)
      finally:
        qa_config.ReleaseNode(tnode)
    finally:
      qa_config.ReleaseInstance(newinst)


def RunDaemonTests(instance, pnode):
  """Test the ganeti-watcher script.

  """
  RunTest(qa_daemon.TestPauseWatcher)

  RunTestIf("instance-automatic-restart",
            qa_daemon.TestInstanceAutomaticRestart, pnode, instance)
  RunTestIf("instance-consecutive-failures",
            qa_daemon.TestInstanceConsecutiveFailures, pnode, instance)

  RunTest(qa_daemon.TestResumeWatcher)


def RunHardwareFailureTests(instance, pnode, snode):
  """Test cluster internal hardware failure recovery.

  """
  RunTestIf("instance-failover", qa_instance.TestInstanceFailover, instance)

  RunTestIf("instance-migrate", qa_instance.TestInstanceMigrate, instance)
  RunTestIf(["instance-migrate", "rapi"],
            qa_rapi.TestRapiInstanceMigrate, instance)

  if qa_config.TestEnabled('instance-replace-disks'):
    othernode = qa_config.AcquireNode(exclude=[pnode, snode])
    try:
      RunTest(qa_instance.TestReplaceDisks,
              instance, pnode, snode, othernode)
    finally:
      qa_config.ReleaseNode(othernode)

  RunTestIf("node-evacuate", qa_node.TestNodeEvacuate, pnode, snode)

  RunTestIf("node-failover", qa_node.TestNodeFailover, pnode, snode)

  RunTestIf("instance-disk-failure", qa_instance.TestInstanceMasterDiskFailure,
            instance, pnode, snode)
  RunTestIf("instance-disk-failure",
            qa_instance.TestInstanceSecondaryDiskFailure, instance,
            pnode, snode)


def RunQa():
  """Main QA body.

  """
  rapi_user = "ganeti-qa"
  rapi_secret = utils.GenerateSecret()

  RunEnvTests()
  SetupCluster(rapi_user, rapi_secret)

  # Load RAPI certificate
  qa_rapi.Setup(rapi_user, rapi_secret)

  RunClusterTests()
  RunOsTests()

  RunTestIf("tags", qa_tags.TestClusterTags)

  RunCommonNodeTests()
  RunGroupListTests()
  RunGroupRwTests()

  pnode = qa_config.AcquireNode(exclude=qa_config.GetMasterNode())
  try:
    RunTestIf("node-readd", qa_node.TestNodeReadd, pnode)
    RunTestIf("node-modify", qa_node.TestNodeModify, pnode)
  finally:
    qa_config.ReleaseNode(pnode)

  pnode = qa_config.AcquireNode()
  try:
    RunTestIf("tags", qa_tags.TestNodeTags, pnode)

    if qa_rapi.Enabled():
      RunTest(qa_rapi.TestNode, pnode)

      if qa_config.TestEnabled("instance-add-plain-disk"):
        for use_client in [True, False]:
          rapi_instance = RunTest(qa_rapi.TestRapiInstanceAdd, pnode,
                                  use_client)
          RunCommonInstanceTests(rapi_instance)
          RunTest(qa_rapi.TestRapiInstanceRemove, rapi_instance, use_client)
          del rapi_instance

    if qa_config.TestEnabled('instance-add-plain-disk'):
      instance = RunTest(qa_instance.TestInstanceAddWithPlainDisk, pnode)
      RunCommonInstanceTests(instance)
      RunGroupListTests()
      RunExportImportTests(instance, pnode, None)
      RunDaemonTests(instance, pnode)
      RunTest(qa_instance.TestInstanceRemove, instance)
      del instance

    multinode_tests = [
      ('instance-add-drbd-disk',
       qa_instance.TestInstanceAddWithDrbdDisk),
    ]

    for name, func in multinode_tests:
      if qa_config.TestEnabled(name):
        snode = qa_config.AcquireNode(exclude=pnode)
        try:
          instance = RunTest(func, pnode, snode)
          RunCommonInstanceTests(instance)
          RunGroupListTests()
          RunTest(qa_group.TestAssignNodesIncludingSplit,
                  constants.INITIAL_NODE_GROUP_NAME,
                  pnode["primary"], snode["primary"])
          if qa_config.TestEnabled('instance-convert-disk'):
            RunTest(qa_instance.TestInstanceShutdown, instance)
            RunTest(qa_instance.TestInstanceConvertDisk, instance, snode)
            RunTest(qa_instance.TestInstanceStartup, instance)
          RunExportImportTests(instance, pnode, snode)
          RunHardwareFailureTests(instance, pnode, snode)
          RunTest(qa_instance.TestInstanceRemove, instance)
          del instance
        finally:
          qa_config.ReleaseNode(snode)

    if qa_config.TestEnabled(["instance-add-plain-disk", "instance-export"]):
      for shutdown in [False, True]:
        instance = RunTest(qa_instance.TestInstanceAddWithPlainDisk, pnode)
        expnode = qa_config.AcquireNode(exclude=pnode)
        try:
          if shutdown:
            # Stop instance before exporting and removing it
            RunTest(qa_instance.TestInstanceShutdown, instance)
          RunTest(qa_instance.TestInstanceExportWithRemove, instance, expnode)
          RunTest(qa_instance.TestBackupList, expnode)
        finally:
          qa_config.ReleaseNode(expnode)
        del expnode
        del instance

  finally:
    qa_config.ReleaseNode(pnode)

  RunTestIf("create-cluster", qa_node.TestNodeRemoveAll)

  RunTestIf("cluster-destroy", qa_cluster.TestClusterDestroy)


@rapi.client.UsesRapiClient
def main():
  """Main program.

  """
  parser = optparse.OptionParser(usage="%prog [options] <config-file>")
  parser.add_option('--yes-do-it', dest='yes_do_it',
      action="store_true",
      help="Really execute the tests")
  (qa_config.options, args) = parser.parse_args()

  if len(args) == 1:
    (config_file, ) = args
  else:
    parser.error("Wrong number of arguments.")

  if not qa_config.options.yes_do_it:
    print ("Executing this script irreversibly destroys any Ganeti\n"
           "configuration on all nodes involved. If you really want\n"
           "to start testing, supply the --yes-do-it option.")
    sys.exit(1)

  qa_config.Load(config_file)

  qa_utils.StartMultiplexer(qa_config.GetMasterNode()["primary"])
  try:
    RunQa()
  finally:
    qa_utils.CloseMultiplexers()

if __name__ == '__main__':
  main()