#
#
-# Copyright (C) 2006, 2007 Google Inc.
+# Copyright (C) 2006, 2007, 2011, 2012 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
"""
+import sys
import logging
+import random
+import time
+import itertools
+import traceback
from ganeti import opcodes
from ganeti import constants
from ganeti import errors
-from ganeti import rpc
+from ganeti import hooksmaster
from ganeti import cmdlib
from ganeti import locking
+from ganeti import utils
+from ganeti import compat
+
+
+_OP_PREFIX = "Op"
+_LU_PREFIX = "LU"
+
+#: LU classes which don't need to acquire the node allocation lock
+#: (L{locking.NAL}) when they acquire all node or node resource locks
+_NODE_ALLOC_WHITELIST = frozenset([])
+
+#: LU classes which don't need to acquire the node allocation lock
+#: (L{locking.NAL}) in the same mode (shared/exclusive) as the node
+#: or node resource locks
+_NODE_ALLOC_MODE_WHITELIST = compat.UniqueFrozenset([
+ cmdlib.LUBackupExport,
+ cmdlib.LUBackupRemove,
+ cmdlib.LUOobCommand,
+ ])
+
+
+class LockAcquireTimeout(Exception):
+ """Exception to report timeouts on acquiring locks.
+
+ """
+
+
+def _CalculateLockAttemptTimeouts():
+ """Calculate timeouts for lock attempts.
+
+ """
+ result = [constants.LOCK_ATTEMPTS_MINWAIT]
+ running_sum = result[0]
+
+ # Wait for a total of at least LOCK_ATTEMPTS_TIMEOUT before doing a
+ # blocking acquire
+ while running_sum < constants.LOCK_ATTEMPTS_TIMEOUT:
+ timeout = (result[-1] * 1.05) ** 1.25
+
+ # Cap max timeout. This gives other jobs a chance to run even if
+ # we're still trying to get our locks, before finally moving to a
+ # blocking acquire.
+ timeout = min(timeout, constants.LOCK_ATTEMPTS_MAXWAIT)
+ # And also cap the lower boundary for safety
+ timeout = max(timeout, constants.LOCK_ATTEMPTS_MINWAIT)
+
+ result.append(timeout)
+ running_sum += timeout
+
+ return result
+
+
+class LockAttemptTimeoutStrategy(object):
+ """Class with lock acquire timeout strategy.
+
+ """
+ __slots__ = [
+ "_timeouts",
+ "_random_fn",
+ "_time_fn",
+ ]
+
+ _TIMEOUT_PER_ATTEMPT = _CalculateLockAttemptTimeouts()
+
+ def __init__(self, _time_fn=time.time, _random_fn=random.random):
+ """Initializes this class.
+
+ @param _time_fn: Time function for unittests
+ @param _random_fn: Random number generator for unittests
+
+ """
+ object.__init__(self)
+
+ self._timeouts = iter(self._TIMEOUT_PER_ATTEMPT)
+ self._time_fn = _time_fn
+ self._random_fn = _random_fn
+
+ def NextAttempt(self):
+ """Returns the timeout for the next attempt.
+
+ """
+ try:
+ timeout = self._timeouts.next()
+ except StopIteration:
+ # No more timeouts, do blocking acquire
+ timeout = None
+
+ if timeout is not None:
+ # Add a small variation (-/+ 5%) to timeout. This helps in situations
+ # where two or more jobs are fighting for the same lock(s).
+ variation_range = timeout * 0.1
+ timeout += ((self._random_fn() * variation_range) -
+ (variation_range * 0.5))
+
+ return timeout
+
+
+class OpExecCbBase: # pylint: disable=W0232
+ """Base class for OpCode execution callbacks.
+
+ """
+ def NotifyStart(self):
+ """Called when we are about to execute the LU.
+
+ This function is called when we're about to start the lu's Exec() method,
+ that is, after we have acquired all locks.
+
+ """
+
+ def Feedback(self, *args):
+ """Sends feedback from the LU code to the end-user.
+
+ """
+
+ def CurrentPriority(self): # pylint: disable=R0201
+ """Returns current priority or C{None}.
+
+ """
+ return None
+
+ def SubmitManyJobs(self, jobs):
+ """Submits jobs for processing.
+
+ See L{jqueue.JobQueue.SubmitManyJobs}.
+
+ """
+ raise NotImplementedError
+
+
+def _LUNameForOpName(opname):
+ """Computes the LU name for a given OpCode name.
+
+ """
+ assert opname.startswith(_OP_PREFIX), \
+ "Invalid OpCode name, doesn't start with %s: %s" % (_OP_PREFIX, opname)
+
+ return _LU_PREFIX + opname[len(_OP_PREFIX):]
+
+
+def _ComputeDispatchTable():
+ """Computes the opcode-to-lu dispatch table.
+
+ """
+ return dict((op, getattr(cmdlib, _LUNameForOpName(op.__name__)))
+ for op in opcodes.OP_MAPPING.values()
+ if op.WITH_LU)
+
+
+def _SetBaseOpParams(src, defcomment, dst):
+ """Copies basic opcode parameters.
+
+ @type src: L{opcodes.OpCode}
+ @param src: Source opcode
+ @type defcomment: string
+ @param defcomment: Comment to specify if not already given
+ @type dst: L{opcodes.OpCode}
+ @param dst: Destination opcode
+
+ """
+ if hasattr(src, "debug_level"):
+ dst.debug_level = src.debug_level
+
+ if (getattr(dst, "priority", None) is None and
+ hasattr(src, "priority")):
+ dst.priority = src.priority
+
+ if not getattr(dst, opcodes.COMMENT_ATTR, None):
+ dst.comment = defcomment
+
+
+def _ProcessResult(submit_fn, op, result):
+ """Examines opcode result.
+
+ If necessary, additional processing on the result is done.
+
+ """
+ if isinstance(result, cmdlib.ResultWithJobs):
+ # Copy basic parameters (e.g. priority)
+ map(compat.partial(_SetBaseOpParams, op,
+ "Submitted by %s" % op.OP_ID),
+ itertools.chain(*result.jobs))
+
+ # Submit jobs
+ job_submission = submit_fn(result.jobs)
+
+ # Build dictionary
+ result = result.other
+
+ assert constants.JOB_IDS_KEY not in result, \
+ "Key '%s' found in additional return values" % constants.JOB_IDS_KEY
+
+ result[constants.JOB_IDS_KEY] = job_submission
+
+ return result
+
+
+def _FailingSubmitManyJobs(_):
+ """Implementation of L{OpExecCbBase.SubmitManyJobs} to raise an exception.
+
+ """
+ raise errors.ProgrammerError("Opcodes processed without callbacks (e.g."
+ " queries) can not submit jobs")
+
+
+def _VerifyLocks(lu, glm, _mode_whitelist=_NODE_ALLOC_MODE_WHITELIST,
+ _nal_whitelist=_NODE_ALLOC_WHITELIST):
+ """Performs consistency checks on locks acquired by a logical unit.
+
+ @type lu: L{cmdlib.LogicalUnit}
+ @param lu: Logical unit instance
+ @type glm: L{locking.GanetiLockManager}
+ @param glm: Lock manager
+
+ """
+ if not __debug__:
+ return
+
+ have_nal = glm.check_owned(locking.LEVEL_NODE_ALLOC, locking.NAL)
+
+ for level in [locking.LEVEL_NODE, locking.LEVEL_NODE_RES]:
+ # TODO: Verify using actual lock mode, not using LU variables
+ if level in lu.needed_locks:
+ share_node_alloc = lu.share_locks[locking.LEVEL_NODE_ALLOC]
+ share_level = lu.share_locks[level]
+
+ if lu.__class__ in _mode_whitelist:
+ assert share_node_alloc != share_level, \
+ "LU is whitelisted to use different modes for node allocation lock"
+ else:
+ assert bool(share_node_alloc) == bool(share_level), \
+ ("Node allocation lock must be acquired using the same mode as nodes"
+ " and node resources")
+
+ if lu.__class__ in _nal_whitelist:
+ assert not have_nal, \
+ "LU is whitelisted for not acquiring the node allocation lock"
+ elif lu.needed_locks[level] == locking.ALL_SET or glm.owning_all(level):
+ assert have_nal, \
+ ("Node allocation lock must be used if an LU acquires all nodes"
+ " or node resources")
class Processor(object):
"""Object which runs OpCodes"""
- DISPATCH_TABLE = {
- # Cluster
- opcodes.OpDestroyCluster: cmdlib.LUDestroyCluster,
- opcodes.OpQueryClusterInfo: cmdlib.LUQueryClusterInfo,
- opcodes.OpVerifyCluster: cmdlib.LUVerifyCluster,
- opcodes.OpQueryConfigValues: cmdlib.LUQueryConfigValues,
- opcodes.OpRenameCluster: cmdlib.LURenameCluster,
- opcodes.OpVerifyDisks: cmdlib.LUVerifyDisks,
- opcodes.OpSetClusterParams: cmdlib.LUSetClusterParams,
- opcodes.OpRedistributeConfig: cmdlib.LURedistributeConfig,
- # node lu
- opcodes.OpAddNode: cmdlib.LUAddNode,
- opcodes.OpQueryNodes: cmdlib.LUQueryNodes,
- opcodes.OpQueryNodeVolumes: cmdlib.LUQueryNodeVolumes,
- opcodes.OpRemoveNode: cmdlib.LURemoveNode,
- opcodes.OpSetNodeParams: cmdlib.LUSetNodeParams,
- opcodes.OpPowercycleNode: cmdlib.LUPowercycleNode,
- # instance lu
- opcodes.OpCreateInstance: cmdlib.LUCreateInstance,
- opcodes.OpReinstallInstance: cmdlib.LUReinstallInstance,
- opcodes.OpRemoveInstance: cmdlib.LURemoveInstance,
- opcodes.OpRenameInstance: cmdlib.LURenameInstance,
- opcodes.OpActivateInstanceDisks: cmdlib.LUActivateInstanceDisks,
- opcodes.OpShutdownInstance: cmdlib.LUShutdownInstance,
- opcodes.OpStartupInstance: cmdlib.LUStartupInstance,
- opcodes.OpRebootInstance: cmdlib.LURebootInstance,
- opcodes.OpDeactivateInstanceDisks: cmdlib.LUDeactivateInstanceDisks,
- opcodes.OpReplaceDisks: cmdlib.LUReplaceDisks,
- opcodes.OpFailoverInstance: cmdlib.LUFailoverInstance,
- opcodes.OpMigrateInstance: cmdlib.LUMigrateInstance,
- opcodes.OpConnectConsole: cmdlib.LUConnectConsole,
- opcodes.OpQueryInstances: cmdlib.LUQueryInstances,
- opcodes.OpQueryInstanceData: cmdlib.LUQueryInstanceData,
- opcodes.OpSetInstanceParams: cmdlib.LUSetInstanceParams,
- opcodes.OpGrowDisk: cmdlib.LUGrowDisk,
- # os lu
- opcodes.OpDiagnoseOS: cmdlib.LUDiagnoseOS,
- # exports lu
- opcodes.OpQueryExports: cmdlib.LUQueryExports,
- opcodes.OpExportInstance: cmdlib.LUExportInstance,
- opcodes.OpRemoveExport: cmdlib.LURemoveExport,
- # tags lu
- opcodes.OpGetTags: cmdlib.LUGetTags,
- opcodes.OpSearchTags: cmdlib.LUSearchTags,
- opcodes.OpAddTags: cmdlib.LUAddTags,
- opcodes.OpDelTags: cmdlib.LUDelTags,
- # test lu
- opcodes.OpTestDelay: cmdlib.LUTestDelay,
- opcodes.OpTestAllocator: cmdlib.LUTestAllocator,
- }
-
- def __init__(self, context):
+ DISPATCH_TABLE = _ComputeDispatchTable()
+
+ def __init__(self, context, ec_id, enable_locks=True):
"""Constructor for Processor
- Args:
- - feedback_fn: the feedback function (taking one string) to be run when
- interesting events are happening
+ @type context: GanetiContext
+ @param context: global Ganeti context
+ @type ec_id: string
+ @param ec_id: execution context identifier
+
"""
self.context = context
- self._feedback_fn = None
- self.exclusive_BGL = False
- self.rpc = rpc.RpcRunner(context.cfg)
+ self._ec_id = ec_id
+ self._cbs = None
+ self.rpc = context.rpc
+ self.hmclass = hooksmaster.HooksMaster
+ self._enable_locks = enable_locks
+
+ def _CheckLocksEnabled(self):
+ """Checks if locking is enabled.
+
+ @raise errors.ProgrammerError: In case locking is not enabled
+
+ """
+ if not self._enable_locks:
+ raise errors.ProgrammerError("Attempted to use disabled locks")
+
+ def _AcquireLocks(self, level, names, shared, opportunistic, timeout):
+ """Acquires locks via the Ganeti lock manager.
+
+ @type level: int
+ @param level: Lock level
+ @type names: list or string
+ @param names: Lock names
+ @type shared: bool
+ @param shared: Whether the locks should be acquired in shared mode
+ @type opportunistic: bool
+ @param opportunistic: Whether to acquire opportunistically
+ @type timeout: None or float
+ @param timeout: Timeout for acquiring the locks
+ @raise LockAcquireTimeout: In case locks couldn't be acquired in specified
+ amount of time
+
+ """
+ self._CheckLocksEnabled()
+
+ if self._cbs:
+ priority = self._cbs.CurrentPriority()
+ else:
+ priority = None
+
+ acquired = self.context.glm.acquire(level, names, shared=shared,
+ timeout=timeout, priority=priority,
+ opportunistic=opportunistic)
+
+ if acquired is None:
+ raise LockAcquireTimeout()
+
+ return acquired
def _ExecLU(self, lu):
"""Logical Unit execution sequence.
"""
write_count = self.context.cfg.write_count
lu.CheckPrereq()
- hm = HooksMaster(self.rpc.call_hooks_runner, self, lu)
+
+ hm = self.BuildHooksManager(lu)
h_results = hm.RunPhase(constants.HOOKS_PHASE_PRE)
lu.HooksCallBack(constants.HOOKS_PHASE_PRE, h_results,
- self._feedback_fn, None)
+ self.Log, None)
if getattr(lu.op, "dry_run", False):
# in this mode, no post-hooks are run, and the config is not
" the operation")
return lu.dry_run_result
+ if self._cbs:
+ submit_mj_fn = self._cbs.SubmitManyJobs
+ else:
+ submit_mj_fn = _FailingSubmitManyJobs
+
try:
- result = lu.Exec(self._feedback_fn)
+ result = _ProcessResult(submit_mj_fn, lu.op, lu.Exec(self.Log))
h_results = hm.RunPhase(constants.HOOKS_PHASE_POST)
result = lu.HooksCallBack(constants.HOOKS_PHASE_POST, h_results,
- self._feedback_fn, result)
+ self.Log, result)
finally:
# FIXME: This needs locks if not lu_class.REQ_BGL
if write_count != self.context.cfg.write_count:
return result
- def _LockAndExecLU(self, lu, level):
+ def BuildHooksManager(self, lu):
+ return self.hmclass.BuildFromLu(lu.rpc.call_hooks_runner, lu)
+
+ def _LockAndExecLU(self, lu, level, calc_timeout):
"""Execute a Logical Unit, with the needed locks.
This is a recursive function that starts locking the given level, and
given LU and its opcodes.
"""
+ glm = self.context.glm
adding_locks = level in lu.add_locks
acquiring_locks = level in lu.needed_locks
+
if level not in locking.LEVELS:
- if callable(self._run_notifier):
- self._run_notifier()
- result = self._ExecLU(lu)
+ _VerifyLocks(lu, glm)
+
+ if self._cbs:
+ self._cbs.NotifyStart()
+
+ try:
+ result = self._ExecLU(lu)
+ except AssertionError, err:
+ # this is a bit ugly, as we don't know from which phase
+ # (prereq, exec) this comes; but it's better than an exception
+ # with no information
+ (_, _, tb) = sys.exc_info()
+ err_info = traceback.format_tb(tb)
+ del tb
+ logging.exception("Detected AssertionError")
+ raise errors.OpExecError("Internal assertion error: please report"
+ " this as a bug.\nError message: '%s';"
+ " location:\n%s" % (str(err), err_info[-1]))
+
elif adding_locks and acquiring_locks:
# We could both acquire and add locks at the same level, but for now we
# don't need this, so we'll avoid the complicated code needed.
- raise NotImplementedError(
- "Can't declare locks to acquire when adding others")
+ raise NotImplementedError("Can't declare locks to acquire when adding"
+ " others")
+
elif adding_locks or acquiring_locks:
+ self._CheckLocksEnabled()
+
lu.DeclareLocks(level)
share = lu.share_locks[level]
- if acquiring_locks:
- needed_locks = lu.needed_locks[level]
- lu.acquired_locks[level] = self.context.glm.acquire(level,
- needed_locks,
- shared=share)
- else: # adding_locks
- add_locks = lu.add_locks[level]
- lu.remove_locks[level] = add_locks
- try:
- self.context.glm.add(level, add_locks, acquired=1, shared=share)
- except errors.LockError:
- raise errors.OpPrereqError(
- "Couldn't add locks (%s), probably because of a race condition"
- " with another job, who added them first" % add_locks)
+ opportunistic = lu.opportunistic_locks[level]
+
try:
+ assert adding_locks ^ acquiring_locks, \
+ "Locks must be either added or acquired"
+
+ if acquiring_locks:
+ # Acquiring locks
+ needed_locks = lu.needed_locks[level]
+
+ self._AcquireLocks(level, needed_locks, share, opportunistic,
+ calc_timeout())
+ else:
+ # Adding locks
+ add_locks = lu.add_locks[level]
+ lu.remove_locks[level] = add_locks
+
+ try:
+ glm.add(level, add_locks, acquired=1, shared=share)
+ except errors.LockError:
+ logging.exception("Detected lock error in level %s for locks"
+ " %s, shared=%s", level, add_locks, share)
+ raise errors.OpPrereqError(
+ "Couldn't add locks (%s), most likely because of another"
+ " job who added them first" % add_locks,
+ errors.ECODE_NOTUNIQUE)
+
try:
- if adding_locks:
- lu.acquired_locks[level] = add_locks
- result = self._LockAndExecLU(lu, level + 1)
+ result = self._LockAndExecLU(lu, level + 1, calc_timeout)
finally:
if level in lu.remove_locks:
- self.context.glm.remove(level, lu.remove_locks[level])
+ glm.remove(level, lu.remove_locks[level])
finally:
- if self.context.glm.is_owned(level):
- self.context.glm.release(level)
+ if glm.is_owned(level):
+ glm.release(level)
+
else:
- result = self._LockAndExecLU(lu, level + 1)
+ result = self._LockAndExecLU(lu, level + 1, calc_timeout)
return result
- def ExecOpCode(self, op, feedback_fn, run_notifier):
+ def ExecOpCode(self, op, cbs, timeout=None):
"""Execute an opcode.
@type op: an OpCode instance
@param op: the opcode to be executed
- @type feedback_fn: a function that takes a single argument
- @param feedback_fn: this function will be used as feedback from the LU
- code to the end-user
- @type run_notifier: callable (no arguments) or None
- @param run_notifier: this function (if callable) will be called when
- we are about to call the lu's Exec() method, that
- is, after we have acquired all locks
+ @type cbs: L{OpExecCbBase}
+ @param cbs: Runtime callbacks
+ @type timeout: float or None
+ @param timeout: Maximum time to acquire all locks, None for no timeout
+ @raise LockAcquireTimeout: In case locks couldn't be acquired in specified
+ amount of time
"""
if not isinstance(op, opcodes.OpCode):
raise errors.ProgrammerError("Non-opcode instance passed"
- " to ExecOpcode")
+ " to ExecOpcode (%s)" % type(op))
- self._feedback_fn = feedback_fn
- self._run_notifier = run_notifier
lu_class = self.DISPATCH_TABLE.get(op.__class__, None)
if lu_class is None:
raise errors.OpCodeUnknown("Unknown opcode")
- # Acquire the Big Ganeti Lock exclusively if this LU requires it, and in a
- # shared fashion otherwise (to prevent concurrent run with an exclusive LU.
- self.context.glm.acquire(locking.LEVEL_CLUSTER, [locking.BGL],
- shared=not lu_class.REQ_BGL)
+ if timeout is None:
+ calc_timeout = lambda: None
+ else:
+ calc_timeout = utils.RunningTimeout(timeout, False).Remaining
+
+ self._cbs = cbs
try:
- self.exclusive_BGL = lu_class.REQ_BGL
- lu = lu_class(self, op, self.context, self.rpc)
- lu.ExpandNames()
- assert lu.needed_locks is not None, "needed_locks not set by LU"
- result = self._LockAndExecLU(lu, locking.LEVEL_INSTANCE)
+ if self._enable_locks:
+ # Acquire the Big Ganeti Lock exclusively if this LU requires it,
+ # and in a shared fashion otherwise (to prevent concurrent run with
+ # an exclusive LU.
+ self._AcquireLocks(locking.LEVEL_CLUSTER, locking.BGL,
+ not lu_class.REQ_BGL, False, calc_timeout())
+ elif lu_class.REQ_BGL:
+ raise errors.ProgrammerError("Opcode '%s' requires BGL, but locks are"
+ " disabled" % op.OP_ID)
+
+ try:
+ lu = lu_class(self, op, self.context, self.rpc)
+ lu.ExpandNames()
+ assert lu.needed_locks is not None, "needed_locks not set by LU"
+
+ try:
+ result = self._LockAndExecLU(lu, locking.LEVEL_CLUSTER + 1,
+ calc_timeout)
+ finally:
+ if self._ec_id:
+ self.context.cfg.DropECReservations(self._ec_id)
+ finally:
+ # Release BGL if owned
+ if self.context.glm.is_owned(locking.LEVEL_CLUSTER):
+ assert self._enable_locks
+ self.context.glm.release(locking.LEVEL_CLUSTER)
finally:
- self.context.glm.release(locking.LEVEL_CLUSTER)
- self.exclusive_BGL = False
+ self._cbs = None
+
+ resultcheck_fn = op.OP_RESULT
+ if not (resultcheck_fn is None or resultcheck_fn(result)):
+ logging.error("Expected opcode result matching %s, got %s",
+ resultcheck_fn, result)
+ if not getattr(op, "dry_run", False):
+ # FIXME: LUs should still behave in dry_run mode, or
+ # alternately we should have OP_DRYRUN_RESULT; in the
+ # meantime, we simply skip the OP_RESULT check in dry-run mode
+ raise errors.OpResultError("Opcode result does not match %s: %s" %
+ (resultcheck_fn, utils.Truncate(result, 80)))
return result
+ def Log(self, *args):
+ """Forward call to feedback callback function.
+
+ """
+ if self._cbs:
+ self._cbs.Feedback(*args)
+
def LogStep(self, current, total, message):
"""Log a change in LU execution progress.
"""
logging.debug("Step %d/%d %s", current, total, message)
- self._feedback_fn("STEP %d/%d %s" % (current, total, message))
+ self.Log("STEP %d/%d %s" % (current, total, message))
def LogWarning(self, message, *args, **kwargs):
"""Log a warning to the logs and the user.
message = message % tuple(args)
if message:
logging.warning(message)
- self._feedback_fn(" - WARNING: %s" % message)
+ self.Log(" - WARNING: %s" % message)
if "hint" in kwargs:
- self._feedback_fn(" Hint: %s" % kwargs["hint"])
+ self.Log(" Hint: %s" % kwargs["hint"])
def LogInfo(self, message, *args):
"""Log an informational message to the logs and the user.
if args:
message = message % tuple(args)
logging.info(message)
- self._feedback_fn(" - INFO: %s" % message)
-
-
-class HooksMaster(object):
- """Hooks master.
-
- This class distributes the run commands to the nodes based on the
- specific LU class.
-
- In order to remove the direct dependency on the rpc module, the
- constructor needs a function which actually does the remote
- call. This will usually be rpc.call_hooks_runner, but any function
- which behaves the same works.
+ self.Log(" - INFO: %s" % message)
- """
- def __init__(self, callfn, proc, lu):
- self.callfn = callfn
- self.proc = proc
- self.lu = lu
- self.op = lu.op
- self.env, node_list_pre, node_list_post = self._BuildEnv()
- self.node_list = {constants.HOOKS_PHASE_PRE: node_list_pre,
- constants.HOOKS_PHASE_POST: node_list_post}
-
- def _BuildEnv(self):
- """Compute the environment and the target nodes.
-
- Based on the opcode and the current node list, this builds the
- environment for the hooks and the target node list for the run.
-
- """
- env = {
- "PATH": "/sbin:/bin:/usr/sbin:/usr/bin",
- "GANETI_HOOKS_VERSION": constants.HOOKS_VERSION,
- "GANETI_OP_CODE": self.op.OP_ID,
- "GANETI_OBJECT_TYPE": self.lu.HTYPE,
- "GANETI_DATA_DIR": constants.DATA_DIR,
- }
-
- if self.lu.HPATH is not None:
- lu_env, lu_nodes_pre, lu_nodes_post = self.lu.BuildHooksEnv()
- if lu_env:
- for key in lu_env:
- env["GANETI_" + key] = lu_env[key]
- else:
- lu_nodes_pre = lu_nodes_post = []
-
- return env, frozenset(lu_nodes_pre), frozenset(lu_nodes_post)
-
- def _RunWrapper(self, node_list, hpath, phase):
- """Simple wrapper over self.callfn.
-
- This method fixes the environment before doing the rpc call.
-
- """
- env = self.env.copy()
- env["GANETI_HOOKS_PHASE"] = phase
- env["GANETI_HOOKS_PATH"] = hpath
- if self.lu.cfg is not None:
- env["GANETI_CLUSTER"] = self.lu.cfg.GetClusterName()
- env["GANETI_MASTER"] = self.lu.cfg.GetMasterNode()
-
- env = dict([(str(key), str(val)) for key, val in env.iteritems()])
-
- return self.callfn(node_list, hpath, phase, env)
-
- def RunPhase(self, phase):
- """Run all the scripts for a phase.
-
- This is the main function of the HookMaster.
-
- @param phase: one of L{constants.HOOKS_PHASE_POST} or
- L{constants.HOOKS_PHASE_PRE}; it denotes the hooks phase
- @return: the processed results of the hooks multi-node rpc call
- @raise errors.HooksFailure: on communication failure to the nodes
-
- """
- if not self.node_list[phase]:
- # empty node list, we should not attempt to run this as either
- # we're in the cluster init phase and the rpc client part can't
- # even attempt to run, or this LU doesn't do hooks at all
- return
- hpath = self.lu.HPATH
- results = self._RunWrapper(self.node_list[phase], hpath, phase)
- if phase == constants.HOOKS_PHASE_PRE:
- errs = []
- if not results:
- raise errors.HooksFailure("Communication failure")
- for node_name in results:
- res = results[node_name]
- if res.offline:
- continue
- msg = res.RemoteFailMsg()
- if msg:
- self.proc.LogWarning("Communication failure to node %s: %s",
- node_name, msg)
- continue
- for script, hkr, output in res.payload:
- if hkr == constants.HKR_FAIL:
- errs.append((node_name, script, output))
- if errs:
- raise errors.HooksAbort(errs)
- return results
-
- def RunConfigUpdate(self):
- """Run the special configuration update hook
-
- This is a special hook that runs only on the master after each
- top-level LI if the configuration has been updated.
+ def GetECId(self):
+ """Returns the current execution context ID.
"""
- phase = constants.HOOKS_PHASE_POST
- hpath = constants.HOOKS_NAME_CFGUPDATE
- nodes = [self.lu.cfg.GetMasterNode()]
- self._RunWrapper(nodes, hpath, phase)
+ if not self._ec_id:
+ raise errors.ProgrammerError("Tried to use execution context id when"
+ " not set")
+ return self._ec_id
projects / ganeti-local / blobdiff