" not one of '%s' as required" %
(dep_job_id, status, utils.CommaJoin(dep_status)))
- @locking.ssynchronized(_LOCK)
+ def _RemoveEmptyWaitersUnlocked(self):
+ """Remove all jobs without actual waiters.
+
+ """
+ for job_id in [job_id for (job_id, waiters) in self._waiters.items()
+ if not waiters]:
+ del self._waiters[job_id]
+
def NotifyWaiters(self, job_id):
"""Notifies all jobs waiting for a certain job ID.
+ @attention: Do not call until L{CheckAndRegister} returned a status other
+ than C{WAITDEP} for C{job_id}, or behaviour is undefined
@type job_id: string
@param job_id: Job ID
"""
assert ht.TString(job_id)
- jobs = self._waiters.pop(job_id, None)
+ self._lock.acquire()
+ try:
+ self._RemoveEmptyWaitersUnlocked()
+
+ jobs = self._waiters.pop(job_id, None)
+ finally:
+ self._lock.release()
+
if jobs:
# Re-add jobs to workerpool
logging.debug("Re-adding %s jobs which were waiting for job %s",
len(jobs), job_id)
self._enqueue_fn(jobs)
- # Remove all jobs without actual waiters
- for job_id in [job_id for (job_id, waiters) in self._waiters.items()
- if not waiters]:
- del self._waiters[job_id]
-
def _RequireOpenQueue(fn):
"""Decorator for "public" functions.
return wrapper
+def _RequireNonDrainedQueue(fn):
+ """Decorator checking for a non-drained queue.
+
+ To be used with functions submitting new jobs.
+
+ """
+ def wrapper(self, *args, **kwargs):
+ """Wrapper function.
+
+ @raise errors.JobQueueDrainError: if the job queue is marked for draining
+
+ """
+ # Ok when sharing the big job queue lock, as the drain file is created when
+ # the lock is exclusive.
+ # Needs access to protected member, pylint: disable=W0212
+ if self._drained:
+ raise errors.JobQueueDrainError("Job queue is drained, refusing job")
+
+ if not self._accepting_jobs:
+ raise errors.JobQueueError("Job queue is shutting down, refusing job")
+
+ return fn(self, *args, **kwargs)
+ return wrapper
+
+
class JobQueue(object):
"""Queue used to manage the jobs.
self.acquire = self._lock.acquire
self.release = self._lock.release
+ # Accept jobs by default
+ self._accepting_jobs = True
+
# Initialize the queue, and acquire the filelock.
# This ensures no other process is working on the job queue.
self._queue_filelock = jstore.InitAndVerifyQueue(must_lock=True)
# TODO: Check consistency across nodes
- self._queue_size = 0
+ self._queue_size = None
self._UpdateQueueSizeUnlocked()
+ assert ht.TInt(self._queue_size)
self._drained = jstore.CheckDrainFlag()
# Job dependencies
logging.info("Job queue inspection finished")
+ def _GetRpc(self, address_list):
+ """Gets RPC runner with context.
+
+ """
+ return rpc.JobQueueRunner(self.context, address_list)
+
@locking.ssynchronized(_LOCK)
@_RequireOpenQueue
def AddNode(self, node):
assert node_name != self._my_hostname
# Clean queue directory on added node
- result = rpc.RpcRunner.call_jobqueue_purge(node_name)
+ result = self._GetRpc(None).call_jobqueue_purge(node_name)
msg = result.fail_msg
if msg:
logging.warning("Cannot cleanup queue directory on node %s: %s",
# Upload current serial file
files.append(constants.JOB_QUEUE_SERIAL_FILE)
+ # Static address list
+ addrs = [node.primary_ip]
+
for file_name in files:
# Read file content
content = utils.ReadFile(file_name)
- result = rpc.RpcRunner.call_jobqueue_update([node_name],
- [node.primary_ip],
- file_name, content)
+ result = self._GetRpc(addrs).call_jobqueue_update([node_name], file_name,
+ content)
msg = result[node_name].fail_msg
if msg:
logging.error("Failed to upload file %s to node %s: %s",
if replicate:
names, addrs = self._GetNodeIp()
- result = rpc.RpcRunner.call_jobqueue_update(names, addrs, file_name, data)
+ result = self._GetRpc(addrs).call_jobqueue_update(names, file_name, data)
self._CheckRpcResult(result, self._nodes, "Updating %s" % file_name)
def _RenameFilesUnlocked(self, rename):
# ... and on all nodes
names, addrs = self._GetNodeIp()
- result = rpc.RpcRunner.call_jobqueue_rename(names, addrs, rename)
+ result = self._GetRpc(addrs).call_jobqueue_rename(names, rename)
self._CheckRpcResult(result, self._nodes, "Renaming files (%r)" % rename)
@staticmethod
@param ops: The list of OpCodes that will become the new job.
@rtype: L{_QueuedJob}
@return: the job object to be queued
- @raise errors.JobQueueDrainError: if the job queue is marked for draining
@raise errors.JobQueueFull: if the job queue has too many jobs in it
@raise errors.GenericError: If an opcode is not valid
"""
- # Ok when sharing the big job queue lock, as the drain file is created when
- # the lock is exclusive.
- if self._drained:
- raise errors.JobQueueDrainError("Job queue is drained, refusing job")
-
if self._queue_size >= constants.JOB_QUEUE_SIZE_HARD_LIMIT:
raise errors.JobQueueFull()
@locking.ssynchronized(_LOCK)
@_RequireOpenQueue
+ @_RequireNonDrainedQueue
def SubmitJob(self, ops):
"""Create and store a new job.
@locking.ssynchronized(_LOCK)
@_RequireOpenQueue
+ @_RequireNonDrainedQueue
def SubmitManyJobs(self, jobs):
"""Create and store multiple jobs.
assert job.writable, "Can't update read-only job"
filename = self._GetJobPath(job.id)
- data = serializer.DumpJson(job.Serialize(), indent=False)
+ data = serializer.DumpJson(job.Serialize())
logging.debug("Writing job %s to %s", job.id, filename)
self._UpdateJobQueueFile(filename, data, replicate)
return jobs
@locking.ssynchronized(_LOCK)
+ def PrepareShutdown(self):
+ """Prepare to stop the job queue.
+
+ Disables execution of jobs in the workerpool and returns whether there are
+ any jobs currently running. If the latter is the case, the job queue is not
+ yet ready for shutdown. Once this function returns C{True} L{Shutdown} can
+ be called without interfering with any job. Queued and unfinished jobs will
+ be resumed next time.
+
+ Once this function has been called no new job submissions will be accepted
+ (see L{_RequireNonDrainedQueue}).
+
+ @rtype: bool
+ @return: Whether there are any running jobs
+
+ """
+ if self._accepting_jobs:
+ self._accepting_jobs = False
+
+ # Tell worker pool to stop processing pending tasks
+ self._wpool.SetActive(False)
+
+ return self._wpool.HasRunningTasks()
+
+ @locking.ssynchronized(_LOCK)
@_RequireOpenQueue
def Shutdown(self):
"""Stops the job queue.
projects / ganeti-local / blobdiff