"""
+import logging
from ganeti import opcodes
from ganeti import constants
from ganeti import errors
from ganeti import rpc
from ganeti import cmdlib
-from ganeti import config
-from ganeti import ssconf
+from ganeti import locking
+from ganeti import utils
+
+
+class OpExecCbBase:
+ """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 ReportLocks(self, msg):
+ """Report lock operations.
+
+ """
+
class Processor(object):
"""Object which runs OpCodes"""
DISPATCH_TABLE = {
# Cluster
- opcodes.OpInitCluster: cmdlib.LUInitCluster,
+ opcodes.OpPostInitCluster: cmdlib.LUPostInitCluster,
opcodes.OpDestroyCluster: cmdlib.LUDestroyCluster,
opcodes.OpQueryClusterInfo: cmdlib.LUQueryClusterInfo,
- opcodes.OpClusterCopyFile: cmdlib.LUClusterCopyFile,
- opcodes.OpRunClusterCommand: cmdlib.LURunClusterCommand,
opcodes.OpVerifyCluster: cmdlib.LUVerifyCluster,
- opcodes.OpMasterFailover: cmdlib.LUMasterFailover,
- opcodes.OpDumpClusterConfig: cmdlib.LUDumpClusterConfig,
+ opcodes.OpQueryConfigValues: cmdlib.LUQueryConfigValues,
opcodes.OpRenameCluster: cmdlib.LURenameCluster,
+ opcodes.OpVerifyDisks: cmdlib.LUVerifyDisks,
+ opcodes.OpSetClusterParams: cmdlib.LUSetClusterParams,
+ opcodes.OpRedistributeConfig: cmdlib.LURedistributeConfig,
+ opcodes.OpRepairDiskSizes: cmdlib.LURepairDiskSizes,
# node lu
opcodes.OpAddNode: cmdlib.LUAddNode,
opcodes.OpQueryNodes: cmdlib.LUQueryNodes,
opcodes.OpQueryNodeVolumes: cmdlib.LUQueryNodeVolumes,
+ opcodes.OpQueryNodeStorage: cmdlib.LUQueryNodeStorage,
+ opcodes.OpModifyNodeStorage: cmdlib.LUModifyNodeStorage,
+ opcodes.OpRepairNodeStorage: cmdlib.LURepairNodeStorage,
opcodes.OpRemoveNode: cmdlib.LURemoveNode,
+ opcodes.OpSetNodeParams: cmdlib.LUSetNodeParams,
+ opcodes.OpPowercycleNode: cmdlib.LUPowercycleNode,
+ opcodes.OpEvacuateNode: cmdlib.LUEvacuateNode,
+ opcodes.OpMigrateNode: cmdlib.LUMigrateNode,
# instance lu
opcodes.OpCreateInstance: cmdlib.LUCreateInstance,
opcodes.OpReinstallInstance: cmdlib.LUReinstallInstance,
opcodes.OpActivateInstanceDisks: cmdlib.LUActivateInstanceDisks,
opcodes.OpShutdownInstance: cmdlib.LUShutdownInstance,
opcodes.OpStartupInstance: cmdlib.LUStartupInstance,
+ opcodes.OpRebootInstance: cmdlib.LURebootInstance,
opcodes.OpDeactivateInstanceDisks: cmdlib.LUDeactivateInstanceDisks,
- opcodes.OpAddMDDRBDComponent: cmdlib.LUAddMDDRBDComponent,
- opcodes.OpRemoveMDDRBDComponent: cmdlib.LURemoveMDDRBDComponent,
opcodes.OpReplaceDisks: cmdlib.LUReplaceDisks,
+ opcodes.OpRecreateInstanceDisks: cmdlib.LURecreateInstanceDisks,
opcodes.OpFailoverInstance: cmdlib.LUFailoverInstance,
+ opcodes.OpMigrateInstance: cmdlib.LUMigrateInstance,
+ opcodes.OpMoveInstance: cmdlib.LUMoveInstance,
opcodes.OpConnectConsole: cmdlib.LUConnectConsole,
opcodes.OpQueryInstances: cmdlib.LUQueryInstances,
opcodes.OpQueryInstanceData: cmdlib.LUQueryInstanceData,
- opcodes.OpSetInstanceParms: cmdlib.LUSetInstanceParms,
+ 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):
+ def __init__(self, context):
"""Constructor for Processor
"""
- self.cfg = None
- self.sstore = None
+ self.context = context
+ self._cbs = None
+ self.exclusive_BGL = False
+ self.rpc = rpc.RpcRunner(context.cfg)
+ self.hmclass = HooksMaster
+
+ def _ReportLocks(self, level, names, shared, acquired):
+ """Reports lock operations.
+
+ @type level: int
+ @param level: Lock level
+ @type names: list or string
+ @param names: Lock names
+ @type shared: bool
+ @param shared: Whether the lock should be acquired in shared mode
+ @type acquired: bool
+ @param acquired: Whether the lock has already been acquired
- def ExecOpCode(self, op, feedback_fn):
- """Execute an opcode.
+ """
+ parts = []
- Args:
- - cfg: the configuration in which we execute this opcode
- - opcode: the opcode to be executed
- - feedback_fn: the feedback function (taking one string) to be run when
- interesting events are happening
+ # Build message
+ if acquired:
+ parts.append("acquired")
+ else:
+ parts.append("waiting")
- """
- if not isinstance(op, opcodes.OpCode):
- raise errors.ProgrammerError("Non-opcode instance passed"
- " to ExecOpcode")
+ parts.append(locking.LEVEL_NAMES[level])
+
+ if names == locking.ALL_SET:
+ parts.append("ALL")
+ elif isinstance(names, basestring):
+ parts.append(names)
+ else:
+ parts.append(",".join(names))
+
+ if shared:
+ parts.append("shared")
+ else:
+ parts.append("exclusive")
- lu_class = self.DISPATCH_TABLE.get(op.__class__, None)
- if lu_class is None:
- raise errors.OpCodeUnknown("Unknown opcode")
+ msg = "/".join(parts)
- if lu_class.REQ_CLUSTER and self.cfg is None:
- self.cfg = config.ConfigWriter()
- self.sstore = ssconf.SimpleStore()
- lu = lu_class(self, op, self.cfg, self.sstore)
+ logging.debug("LU locks %s", msg)
+
+ if self._cbs:
+ self._cbs.ReportLocks(msg)
+
+ def _ExecLU(self, lu):
+ """Logical Unit execution sequence.
+
+ """
+ write_count = self.context.cfg.write_count
lu.CheckPrereq()
- do_hooks = lu_class.HPATH is not None
- if do_hooks:
- hm = HooksMaster(rpc.call_hooks_runner, lu)
- hm.RunPhase(constants.HOOKS_PHASE_PRE)
- result = lu.Exec(feedback_fn)
- if do_hooks:
- hm.RunPhase(constants.HOOKS_PHASE_POST)
+ hm = HooksMaster(self.rpc.call_hooks_runner, lu)
+ h_results = hm.RunPhase(constants.HOOKS_PHASE_PRE)
+ lu.HooksCallBack(constants.HOOKS_PHASE_PRE, h_results,
+ self._Feedback, 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)
+ h_results = hm.RunPhase(constants.HOOKS_PHASE_POST)
+ result = lu.HooksCallBack(constants.HOOKS_PHASE_POST, h_results,
+ self._Feedback, result)
+ finally:
+ # FIXME: This needs locks if not lu_class.REQ_BGL
+ if write_count != self.context.cfg.write_count:
+ hm.RunConfigUpdate()
+
return result
- def ChainOpCode(self, op, feedback_fn):
- """Chain and execute an opcode.
+ def _LockAndExecLU(self, lu, level):
+ """Execute a Logical Unit, with the needed locks.
- This is used by LUs when they need to execute a child LU.
+ This is a recursive function that starts locking the given level, and
+ proceeds up, till there are no more locks to acquire. Then it executes the
+ given LU and its opcodes.
- Args:
- - opcode: the opcode to be executed
- - feedback_fn: the feedback function (taking one string) to be run when
- interesting events are happening
+ """
+ adding_locks = level in lu.add_locks
+ acquiring_locks = level in lu.needed_locks
+ if level not in locking.LEVELS:
+ 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")
+ elif adding_locks or acquiring_locks:
+ lu.DeclareLocks(level)
+ share = lu.share_locks[level]
+ if acquiring_locks:
+ needed_locks = lu.needed_locks[level]
+
+ self._ReportLocks(level, needed_locks, share, False)
+ lu.acquired_locks[level] = self.context.glm.acquire(level,
+ needed_locks,
+ shared=share)
+ self._ReportLocks(level, needed_locks, share, True)
+
+ 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)
+ try:
+ try:
+ if adding_locks:
+ lu.acquired_locks[level] = add_locks
+ result = self._LockAndExecLU(lu, level + 1)
+ 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)
+
+ return result
+
+ def ExecOpCode(self, op, cbs):
+ """Execute an opcode.
+
+ @type op: an OpCode instance
+ @param op: the opcode to be executed
+ @type cbs: L{OpExecCbBase}
+ @param cbs: Runtime callbacks
"""
if not isinstance(op, opcodes.OpCode):
raise errors.ProgrammerError("Non-opcode instance passed"
" to ExecOpcode")
- lu_class = self.DISPATCH_TABLE.get(op.__class__, None)
- if lu_class is None:
- raise errors.OpCodeUnknown("Unknown opcode")
+ self._cbs = cbs
+ try:
+ 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._ReportLocks(locking.LEVEL_CLUSTER, [locking.BGL],
+ not lu_class.REQ_BGL, False)
+ try:
+ self.context.glm.acquire(locking.LEVEL_CLUSTER, [locking.BGL],
+ shared=not lu_class.REQ_BGL)
+ finally:
+ self._ReportLocks(locking.LEVEL_CLUSTER, [locking.BGL],
+ not lu_class.REQ_BGL, True)
+ 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)
+ finally:
+ self.context.glm.release(locking.LEVEL_CLUSTER)
+ self.exclusive_BGL = False
+ finally:
+ self._cbs = None
- if lu_class.REQ_CLUSTER and self.cfg is None:
- self.cfg = config.ConfigWriter()
- self.sstore = ssconf.SimpleStore()
- #do_hooks = lu_class.HPATH is not None
- lu = lu_class(self, op, self.cfg, self.sstore)
- lu.CheckPrereq()
- #if do_hooks:
- # hm = HooksMaster(rpc.call_hooks_runner, lu)
- # hm.RunPhase(constants.HOOKS_PHASE_PRE)
- result = lu.Exec(feedback_fn)
- #if do_hooks:
- # hm.RunPhase(constants.HOOKS_PHASE_POST)
return result
+ def _Feedback(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("STEP %d/%d %s" % (current, total, message))
+
+ def LogWarning(self, message, *args, **kwargs):
+ """Log a warning to the logs and the user.
+
+ The optional keyword argument is 'hint' and can be used to show a
+ hint to the user (presumably related to the warning). If the
+ message is empty, it will not be printed at all, allowing one to
+ show only a hint.
+
+ """
+ assert not kwargs or (len(kwargs) == 1 and "hint" in kwargs), \
+ "Invalid keyword arguments for LogWarning (%s)" % str(kwargs)
+ if args:
+ message = message % tuple(args)
+ if message:
+ logging.warning(message)
+ self._Feedback(" - WARNING: %s" % message)
+ if "hint" in kwargs:
+ self._Feedback(" 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(" - INFO: %s" % message)
+
class HooksMaster(object):
"""Hooks master.
self.callfn = callfn
self.lu = lu
self.op = lu.op
- self.hpath = self.lu.HPATH
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}
"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,
}
- 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.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 = []
- if self.lu.sstore is not None:
- env["GANETI_CLUSTER"] = self.lu.sstore.GetClusterName()
- env["GANETI_MASTER"] = self.lu.sstore.GetMasterNode()
+ return env, frozenset(lu_nodes_pre), frozenset(lu_nodes_post)
- for key in env:
- if not isinstance(env[key], str):
- env[key] = str(env[key])
+ def _RunWrapper(self, node_list, hpath, phase):
+ """Simple wrapper over self.callfn.
- return env, frozenset(lu_nodes_pre), frozenset(lu_nodes_post)
+ 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()
- def RunPhase(self, phase):
+ env = dict([(str(key), str(val)) for key, val in env.iteritems()])
+
+ return self.callfn(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.
+ @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]:
- # empty node list, we should not attempt to run this
- # as most probably we're in the cluster init phase and the rpc client
- # part can't even attempt to run
+ if not self.node_list[phase] and 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
- self.env["GANETI_HOOKS_PHASE"] = str(phase)
- results = self.callfn(self.node_list[phase], self.hpath, phase, self.env)
- 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 is False or not isinstance(res, list):
- raise errors.HooksFailure("Communication failure to node %s" %
- node_name)
- for script, hkr, output in res:
- if hkr == constants.HKR_FAIL:
- output = output.strip().encode("string_escape")
+ hpath = self.lu.HPATH
+ if nodes is not None:
+ results = self._RunWrapper(nodes, hpath, phase)
+ else:
+ results = self._RunWrapper(self.node_list[phase], hpath, phase)
+ errs = []
+ if not results:
+ msg = "Communication Failure"
+ if phase == constants.HOOKS_PHASE_PRE:
+ raise errors.HooksFailure(msg)
+ else:
+ self.lu.LogWarning(msg)
+ return results
+ for node_name in results:
+ res = results[node_name]
+ if res.offline:
+ continue
+ msg = res.fail_msg
+ if msg:
+ self.lu.LogWarning("Communication failure to node %s: %s",
+ node_name, msg)
+ continue
+ for script, hkr, output in res.payload:
+ 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.lu.LogWarning("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):
+ """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.
+
+ """
+ phase = constants.HOOKS_PHASE_POST
+ hpath = constants.HOOKS_NAME_CFGUPDATE
+ nodes = [self.lu.cfg.GetMasterNode()]
+ self._RunWrapper(nodes, hpath, phase)
projects / ganeti-local / blobdiff