#
#
-# Copyright (C) 2006, 2007 Google Inc.
+# Copyright (C) 2006, 2007, 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
"""
import logging
+import random
+import time
from ganeti import opcodes
from ganeti import constants
from ganeti import errors
-from ganeti import rpc
from ganeti import cmdlib
from ganeti import locking
+from ganeti import utils
+from ganeti import compat
+
+
+_OP_PREFIX = "Op"
+_LU_PREFIX = "LU"
+
+
+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 CheckCancel(self):
+ """Check whether job has been cancelled.
+
+ """
+
+ 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 _RpcResultsToHooksResults(rpc_results):
+ """Function to convert RPC results to the format expected by HooksMaster.
+
+ @type rpc_results: dict(node: L{rpc.RpcResult})
+ @param rpc_results: RPC results
+ @rtype: dict(node: (fail_msg, offline, hooks_results))
+ @return: RPC results unpacked according to the format expected by
+ L({mcpu.HooksMaster}
+
+ """
+ return dict((node, (rpc_res.fail_msg, rpc_res.offline, rpc_res.payload))
+ for (node, rpc_res) in rpc_results.items())
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):
"""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
+
+ def _AcquireLocks(self, level, names, shared, timeout, priority):
+ """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 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
+
+ """
+ if self._cbs:
+ self._cbs.CheckCancel()
+
+ acquired = self.context.glm.acquire(level, names, shared=shared,
+ timeout=timeout, priority=priority)
+
+ if acquired is None:
+ raise LockAcquireTimeout()
+
+ return acquired
+
+ def _ProcessResult(self, result):
+ """Examines opcode result.
+
+ If necessary, additional processing on the result is done.
+
+ """
+ if isinstance(result, cmdlib.ResultWithJobs):
+ # Submit jobs
+ job_submission = self._cbs.SubmitManyJobs(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 _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
+ # written (as it might have been modified by another LU, and we
+ # shouldn't do writeout on behalf of other threads
+ self.LogInfo("dry-run mode requested, not actually executing"
+ " the operation")
+ return lu.dry_run_result
+
try:
- result = lu.Exec(self._feedback_fn)
+ result = self._ProcessResult(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, priority):
"""Execute a Logical Unit, with the needed locks.
This is a recursive function that starts locking the given level, and
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()
+ if self._cbs:
+ self._cbs.NotifyStart()
+
result = self._ExecLU(lu)
+
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:
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(
- "Coudn't add locks (%s), probably because of a race condition"
- " with another job, who added them first" % add_locks)
+
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,
+ calc_timeout(), priority)
+ 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,
+ errors.ECODE_FAULT)
+
try:
- if adding_locks:
- lu.acquired_locks[level] = add_locks
- result = self._LockAndExecLU(lu, level + 1)
+ result = self._LockAndExecLU(lu, level + 1, calc_timeout, priority)
finally:
if level in lu.remove_locks:
self.context.glm.remove(level, lu.remove_locks[level])
finally:
if self.context.glm.is_owned(level):
self.context.glm.release(level)
+
else:
- result = self._LockAndExecLU(lu, level + 1)
+ result = self._LockAndExecLU(lu, level + 1, calc_timeout, priority)
return result
- def ExecOpCode(self, op, feedback_fn, run_notifier):
+ def ExecOpCode(self, op, cbs, timeout=None, priority=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 aquired 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
+ @type priority: number or None
+ @param priority: Priority for acquiring lock(s)
+ @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)
+ # 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, calc_timeout(),
+ priority)
+ 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_INSTANCE, calc_timeout,
+ priority)
+ finally:
+ if self._ec_id:
+ self.context.cfg.DropECReservations(self._ec_id)
+ finally:
+ 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)
+ raise errors.OpResultError("Opcode result does not match %s" %
+ resultcheck_fn)
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)
+ self.Log(" - INFO: %s" % message)
+ def GetECId(self):
+ """Returns the current execution context ID.
-class HooksMaster(object):
- """Hooks master.
+ """
+ if not self._ec_id:
+ raise errors.ProgrammerError("Tried to use execution context id when"
+ " not set")
+ return self._ec_id
- 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.
+class HooksMaster(object):
+ def __init__(self, opcode, hooks_path, nodes, hooks_execution_fn,
+ hooks_results_adapt_fn, build_env_fn, log_fn, htype=None, cluster_name=None,
+ master_name=None):
+ """Base class for hooks masters.
+
+ This class invokes the execution of hooks according to the behaviour
+ specified by its parameters.
+
+ @type opcode: string
+ @param opcode: opcode of the operation to which the hooks are tied
+ @type hooks_path: string
+ @param hooks_path: prefix of the hooks directories
+ @type nodes: 2-tuple of lists
+ @param nodes: 2-tuple of lists containing nodes on which pre-hooks must be
+ run and nodes on which post-hooks must be run
+ @type hooks_execution_fn: function that accepts the following parameters:
+ (node_list, hooks_path, phase, environment)
+ @param hooks_execution_fn: function that will execute the hooks; can be
+ None, indicating that no conversion is necessary.
+ @type hooks_results_adapt_fn: function
+ @param hooks_results_adapt_fn: function that will adapt the return value of
+ hooks_execution_fn to the format expected by RunPhase
+ @type build_env_fn: function that returns a dictionary having strings as
+ keys
+ @param build_env_fn: function that builds the environment for the hooks
+ @type log_fn: function that accepts a string
+ @param log_fn: logging function
+ @type htype: string or None
+ @param htype: None or one of L{constants.HTYPE_CLUSTER},
+ L{constants.HTYPE_NODE}, L{constants.HTYPE_INSTANCE}
+ @type cluster_name: string
+ @param cluster_name: name of the cluster
+ @type master_name: string
+ @param master_name: name of the master
- """
- 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):
+ """
+ self.opcode = opcode
+ self.hooks_path = hooks_path
+ self.hooks_execution_fn = hooks_execution_fn
+ self.hooks_results_adapt_fn = hooks_results_adapt_fn
+ self.build_env_fn = build_env_fn
+ self.log_fn = log_fn
+ self.htype = htype
+ self.cluster_name = cluster_name
+ self.master_name = master_name
+
+ self.pre_env = self._BuildEnv(constants.HOOKS_PHASE_PRE)
+ (self.pre_nodes, self.post_nodes) = nodes
+
+ def _BuildEnv(self, phase):
"""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 phase == constants.HOOKS_PHASE_PRE:
+ prefix = "GANETI_"
+ elif phase == constants.HOOKS_PHASE_POST:
+ prefix = "GANETI_POST_"
+ else:
+ raise AssertionError("Unknown phase '%s'" % phase)
+
+ env = {}
- 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]
+ if self.hooks_path is not None:
+ phase_env = self.build_env_fn()
+ if phase_env:
+ assert not compat.any(key.upper().startswith(prefix)
+ for key in phase_env)
+ env.update(("%s%s" % (prefix, key), value)
+ for (key, value) in phase_env.items())
+
+ if phase == constants.HOOKS_PHASE_PRE:
+ assert compat.all((key.startswith("GANETI_") and
+ not key.startswith("GANETI_POST_"))
+ for key in env)
+
+ elif phase == constants.HOOKS_PHASE_POST:
+ assert compat.all(key.startswith("GANETI_POST_") for key in env)
+ assert isinstance(self.pre_env, dict)
+
+ # Merge with pre-phase environment
+ assert not compat.any(key.startswith("GANETI_POST_")
+ for key in self.pre_env)
+ env.update(self.pre_env)
else:
- lu_nodes_pre = lu_nodes_post = []
+ raise AssertionError("Unknown phase '%s'" % phase)
- return env, frozenset(lu_nodes_pre), frozenset(lu_nodes_post)
+ return env
- def _RunWrapper(self, node_list, hpath, phase):
+ def _RunWrapper(self, node_list, hpath, phase, phase_env):
"""Simple wrapper over self.callfn.
- This method fixes the environment before doing the rpc call.
+ This method fixes the environment before executing the hooks.
"""
- 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 = {
+ "PATH": constants.HOOKS_PATH,
+ "GANETI_HOOKS_VERSION": constants.HOOKS_VERSION,
+ "GANETI_OP_CODE": self.opcode,
+ "GANETI_DATA_DIR": constants.DATA_DIR,
+ "GANETI_HOOKS_PHASE": phase,
+ "GANETI_HOOKS_PATH": hpath,
+ }
+ if self.htype:
+ env["GANETI_OBJECT_TYPE"] = self.htype
+
+ if self.cluster_name is not None:
+ env["GANETI_CLUSTER"] = self.cluster_name
+
+ if self.master_name is not None:
+ env["GANETI_MASTER"] = self.master_name
+
+ if phase_env:
+ env = utils.algo.JoinDisjointDicts(env, phase_env)
+
+ # Convert everything to strings
env = dict([(str(key), str(val)) for key, val in env.iteritems()])
- return self.callfn(node_list, hpath, phase, env)
+ assert compat.all(key == "PATH" or key.startswith("GANETI_")
+ for key in env)
- def RunPhase(self, phase):
+ return self.hooks_execution_fn(node_list, hpath, phase, env)
+
+ def RunPhase(self, phase, nodes=None):
"""Run all the scripts for a phase.
This is the main function of the HookMaster.
+ It executes self.hooks_execution_fn, and after running
+ self.hooks_results_adapt_fn on its results it expects them to be in the form
+ {node_name: (fail_msg, [(script, result, output), ...]}).
@param phase: one of L{constants.HOOKS_PHASE_POST} or
L{constants.HOOKS_PHASE_PRE}; it denotes the hooks phase
+ @param nodes: overrides the predefined list of nodes for the given phase
@return: the processed results of the hooks multi-node rpc call
@raise errors.HooksFailure: on communication failure to the nodes
+ @raise errors.HooksAbort: on failure of one of the hooks
"""
- if not self.node_list[phase]:
+ if phase == constants.HOOKS_PHASE_PRE:
+ if nodes is None:
+ nodes = self.pre_nodes
+ env = self.pre_env
+ elif phase == constants.HOOKS_PHASE_POST:
+ if nodes is None:
+ nodes = self.post_nodes
+ env = self._BuildEnv(phase)
+ else:
+ raise AssertionError("Unknown phase '%s'" % phase)
+
+ if not nodes:
# 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:
+
+ results = self._RunWrapper(nodes, self.hooks_path, phase, env)
+ if not results:
+ msg = "Communication Failure"
+ if phase == constants.HOOKS_PHASE_PRE:
+ raise errors.HooksFailure(msg)
+ else:
+ self.log_fn(msg)
+ return results
+
+ converted_res = results
+ if self.hooks_results_adapt_fn:
+ converted_res = self.hooks_results_adapt_fn(results)
+
+ errs = []
+ for node_name, (fail_msg, offline, hooks_results) in converted_res.items():
+ if offline:
+ continue
+
+ if fail_msg:
+ self.log_fn("Communication failure to node %s: %s", node_name, fail_msg)
+ continue
+
+ for script, hkr, output in hooks_results:
+ if hkr == constants.HKR_FAIL:
+ if phase == constants.HOOKS_PHASE_PRE:
errs.append((node_name, script, output))
- if errs:
- raise errors.HooksAbort(errs)
+ else:
+ if not output:
+ output = "(no output)"
+ self.log_fn("On %s script %s failed, output: %s" %
+ (node_name, script, output))
+
+ if errs and phase == constants.HOOKS_PHASE_PRE:
+ raise errors.HooksAbort(errs)
+
return results
def RunConfigUpdate(self):
"""
phase = constants.HOOKS_PHASE_POST
hpath = constants.HOOKS_NAME_CFGUPDATE
- nodes = [self.lu.cfg.GetMasterNode()]
- self._RunWrapper(nodes, hpath, phase)
+ nodes = [self.master_name]
+ self._RunWrapper(nodes, hpath, phase, self.pre_env)
+
+ @staticmethod
+ def BuildFromLu(hooks_execution_fn, lu):
+ if lu.HPATH is None:
+ nodes = (None, None)
+ else:
+ nodes = map(frozenset, lu.BuildHooksNodes())
+
+ master_name = cluster_name = None
+ if lu.cfg:
+ master_name = lu.cfg.GetMasterNode()
+ cluster_name = lu.cfg.GetClusterName()
+
+ return HooksMaster(lu.op.OP_ID, lu.HPATH, nodes, hooks_execution_fn,
+ _RpcResultsToHooksResults, lu.BuildHooksEnv,
+ lu.LogWarning, lu.HTYPE, cluster_name, master_name)
projects / ganeti-local / blobdiff