#
#
-# Copyright (C) 2006, 2007, 2008, 2009, 2010 Google Inc.
+# Copyright (C) 2006, 2007, 2008, 2009, 2010, 2012, 2013 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
# must be afile
_FILE_CHECK = (utils.IsNormAbsPath, "must be an absolute normalized path",
- os.path.isfile, "not found or not a file")
+ os.path.isfile, "not found or not a file")
# must be a directory
_DIR_CHECK = (utils.IsNormAbsPath, "must be an absolute normalized path",
- os.path.isdir, "not found or not a directory")
+ os.path.isdir, "not found or not a directory")
# CPU mask must be well-formed
# TODO: implement node level check for the CPU mask
_NET_PORT_CHECK = (lambda x: 0 < x < 65535, "invalid port number",
None, None)
+# Check that an integer is non negative
+_NONNEGATIVE_INT_CHECK = (lambda x: x >= 0, "cannot be negative", None, None)
+
# nice wrappers for users
REQ_FILE_CHECK = (True, ) + _FILE_CHECK
OPT_FILE_CHECK = (False, ) + _FILE_CHECK
OPT_CPU_MASK_CHECK = (False, ) + _CPU_MASK_CHECK
REQ_MULTI_CPU_MASK_CHECK = (True, ) + _MULTI_CPU_MASK_CHECK
OPT_MULTI_CPU_MASK_CHECK = (False, ) + _MULTI_CPU_MASK_CHECK
+REQ_NONNEGATIVE_INT_CHECK = (True, ) + _NONNEGATIVE_INT_CHECK
+OPT_NONNEGATIVE_INT_CHECK = (False, ) + _NONNEGATIVE_INT_CHECK
# no checks at all
NO_CHECK = (False, None, None, None, None)
"""
PARAMETERS = {}
ANCILLARY_FILES = []
+ ANCILLARY_FILES_OPT = []
CAN_MIGRATE = False
- def __init__(self):
- pass
-
def StartInstance(self, instance, block_devices, startup_paused):
"""Start an instance."""
raise NotImplementedError
"""Return a list of ancillary files to be copied to all nodes as ancillary
configuration files.
- @rtype: list of strings
- @return: list of absolute paths of files to ship cluster-wide
+ @rtype: (list of absolute paths, list of absolute paths)
+ @return: (all files, optional files)
"""
# By default we return a member variable, so that if an hypervisor has just
# a static list of files it doesn't have to override this function.
- return cls.ANCILLARY_FILES
+ assert set(cls.ANCILLARY_FILES).issuperset(cls.ANCILLARY_FILES_OPT), \
+ "Optional ancillary files must be a subset of ancillary files"
+
+ return (cls.ANCILLARY_FILES, cls.ANCILLARY_FILES_OPT)
def Verify(self):
"""Verify the hypervisor.
+ @return: Problem description if something is wrong, C{None} otherwise
+
"""
raise NotImplementedError
- def MigrationInfo(self, instance): # pylint: disable-msg=R0201,W0613
+ def MigrationInfo(self, instance): # pylint: disable=R0201,W0613
"""Get instance information to perform a migration.
By default assume no information is needed.
"""
pass
- def FinalizeMigration(self, instance, info, success):
- """Finalized an instance migration.
+ def BalloonInstanceMemory(self, instance, mem):
+ """Balloon an instance memory to a certain value.
+
+ @type instance: L{objects.Instance}
+ @param instance: instance to be accepted
+ @type mem: int
+ @param mem: actual memory size to use for instance runtime
+
+ """
+ raise NotImplementedError
+
+ def FinalizeMigrationDst(self, instance, info, success):
+ """Finalize the instance migration on the target node.
Should finalize or revert any preparation done to accept the instance.
Since by default we do no preparation, we also don't have anything to do
"""
raise NotImplementedError
+ def FinalizeMigrationSource(self, instance, success, live):
+ """Finalize the instance migration on the source node.
+
+ @type instance: L{objects.Instance}
+ @param instance: the instance that was migrated
+ @type success: bool
+ @param success: whether the migration succeeded or not
+ @type live: bool
+ @param live: whether the user requested a live migration or not
+
+ """
+ pass
+
+ def GetMigrationStatus(self, instance):
+ """Get the migration status
+
+ @type instance: L{objects.Instance}
+ @param instance: the instance that is being migrated
+ @rtype: L{objects.MigrationStatus}
+ @return: the status of the current migration (one of
+ L{constants.HV_MIGRATION_VALID_STATUSES}), plus any additional
+ progress info that can be retrieved from the hypervisor
+
+ """
+ raise NotImplementedError
+
+ def _InstanceStartupMemory(self, instance):
+ """Get the correct startup memory for an instance
+
+ This function calculates how much memory an instance should be started
+ with, making sure it's a value between the minimum and the maximum memory,
+ but also trying to use no more than the current free memory on the node.
+
+ @type instance: L{objects.Instance}
+ @param instance: the instance that is being started
+ @rtype: integer
+ @return: memory the instance should be started with
+
+ """
+ free_memory = self.GetNodeInfo()["memory_free"]
+ max_start_mem = min(instance.beparams[constants.BE_MAXMEM], free_memory)
+ start_mem = max(instance.beparams[constants.BE_MINMEM], max_start_mem)
+ return start_mem
+
@classmethod
def CheckParameterSyntax(cls, hvparams):
"""Check the given parameters for validity.
result = utils.RunCmd(["reboot", "-n", "-f"])
if not result:
logging.error("Can't run shutdown: %s", result.output)
+
+ @staticmethod
+ def _FormatVerifyResults(msgs):
+ """Formats the verification results, given a list of errors.
+
+ @param msgs: list of errors, possibly empty
+ @return: overall problem description if something is wrong,
+ C{None} otherwise
+
+ """
+ if msgs:
+ return "; ".join(msgs)
+ else:
+ return None