zuul
/
zuul
Code Issues Proposed changes

Annotate node request processing with event id 

Adding the event ids to the ndoeset processing makes it much easier to
trace events through the system. This also adds the event id as
metadata to the node request so nodepool can continue annotating logs
while working on the node request.

Change-Id: I2fac44564552d1fd303b76b994f4c4c16c1370b1
This commit is contained in:
Tobias Henkel 2019-05-13 20:23:13 +02:00
parent e161ffb3bc
commit c825e4769f
No known key found for this signature in database
GPG Key ID: 03750DEC158E5FA2
4 changed files with 61 additions and 44 deletions
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23
zuul/manager/__init__.py
View File

@ -378,19 +378,21 @@ class PipelineManager(object):
change.commit_needs_changes = dependencies
def provisionNodes(self, item):
log = get_annotated_logger(self.log, item.event)
jobs = item.findJobsToRequest(item.pipeline.tenant.semaphore_handler)
if not jobs:
return False
build_set = item.current_build_set
self.log.debug("Requesting nodes for change %s" % item.change)
log.debug("Requesting nodes for change %s", item.change)
if self.sched.use_relative_priority:
priority = item.getNodePriority()
else:
priority = 0
for job in jobs:
req = self.sched.nodepool.requestNodes(build_set, job, priority)
self.log.debug("Adding node request %s for job %s to item %s" %
(req, job, item))
req = self.sched.nodepool.requestNodes(
build_set, job, priority, event=item.event)
log.debug("Adding node request %s for job %s to item %s",
req, job, item)
build_set.setJobNodeRequest(job.name, req)
return True
@ -928,21 +930,22 @@ class PipelineManager(object):
def onNodesProvisioned(self, event):
# TODOv3(jeblair): handle provisioning failure here
request = event.request
log = get_annotated_logger(self.log, request.event_id)
build_set = request.build_set
build_set.jobNodeRequestComplete(request.job.name,
request.nodeset)
if request.failed or not request.fulfilled:
self.log.info("Node request %s: failure for %s" %
(request, request.job.name,))
log.info("Node request %s: failure for %s",
request, request.job.name)
build_set.item.setNodeRequestFailure(request.job)
self._resumeBuilds(request.build_set)
tenant = build_set.item.pipeline.tenant
tenant.semaphore_handler.release(build_set.item, request.job)
self.log.info("Completed node request %s for job %s of item %s "
"with nodes %s" %
(request, request.job, build_set.item,
request.nodeset))
log.info("Completed node request %s for job %s of item %s "
"with nodes %s",
request, request.job, build_set.item, request.nodeset)
def reportItem(self, item):
if not item.reported:

8
zuul/model.py
View File

@ -704,7 +704,8 @@ class NodeSet(ConfigObject):
class NodeRequest(object):
"""A request for a set of nodes."""
def __init__(self, requestor, build_set, job, nodeset, relative_priority):
def __init__(self, requestor, build_set, job, nodeset, relative_priority,
event=None):
self.requestor = requestor
self.build_set = build_set
self.job = job
@ -719,6 +720,10 @@ class NodeRequest(object):
self.provider = self._getPausedParentProvider()
self.id = None
self._zk_data = {} # Data that we read back from ZK
if event is not None:
self.event_id = event.zuul_event_id
else:
self.event_id = None
# Zuul internal flags (not stored in ZK so they are not
# overwritten).
self.failed = False
@ -786,6 +791,7 @@ class NodeRequest(object):
d['state'] = self.state
d['state_time'] = self.state_time
d['relative_priority'] = self.relative_priority
d['event_id'] = self.event_id
return d
def updateFromDict(self, data):

59
zuul/nodepool.py
View File

@ -13,6 +13,7 @@
import logging
from zuul import model
from zuul.lib.logutil import get_annotated_logger
from zuul.zk import LockException
@ -59,34 +60,36 @@ class Nodepool(object):
pipe.gauge('zuul.nodepool.current_requests', len(self.requests))
pipe.send()
def requestNodes(self, build_set, job, relative_priority):
def requestNodes(self, build_set, job, relative_priority, event=None):
log = get_annotated_logger(self.log, event)
# Create a copy of the nodeset to represent the actual nodes
# returned by nodepool.
nodeset = job.nodeset.copy()
req = model.NodeRequest(self.sched.hostname, build_set, job,
nodeset, relative_priority)
nodeset, relative_priority, event=event)
self.requests[req.uid] = req
if nodeset.nodes:
self.sched.zk.submitNodeRequest(req, self._updateNodeRequest)
# Logged after submission so that we have the request id
self.log.info("Submitted node request %s" % (req,))
log.info("Submitted node request %s", req)
self.emitStats(req)
else:
self.log.info("Fulfilling empty node request %s" % (req,))
log.info("Fulfilling empty node request %s", req)
req.state = model.STATE_FULFILLED
self.sched.onNodesProvisioned(req)
del self.requests[req.uid]
return req
def cancelRequest(self, request):
self.log.info("Canceling node request %s" % (request,))
log = get_annotated_logger(self.log, request.event_id)
log.info("Canceling node request %s", request)
if request.uid in self.requests:
request.canceled = True
try:
self.sched.zk.deleteNodeRequest(request)
except Exception:
self.log.exception("Error deleting node request:")
log.exception("Error deleting node request:")
def reviseRequest(self, request, relative_priority=None):
'''Attempt to update the node request, if it is not currently being
@ -97,28 +100,29 @@ class Nodepool(object):
priority to set on the request.
'''
log = get_annotated_logger(self.log, request.event_id)
if relative_priority is None:
return
try:
self.sched.zk.lockNodeRequest(request, blocking=False)
except LockException:
# It may be locked by nodepool, which is fine.
self.log.debug("Unable to revise locked node request %s", request)
log.debug("Unable to revise locked node request %s", request)
return False
try:
old_priority = request.relative_priority
request.relative_priority = relative_priority
self.sched.zk.storeNodeRequest(request)
self.log.debug("Revised relative priority of "
"node request %s from %s to %s",
request, old_priority, relative_priority)
log.debug("Revised relative priority of "
"node request %s from %s to %s",
request, old_priority, relative_priority)
except Exception:
self.log.exception("Unable to update node request %s", request)
log.exception("Unable to update node request %s", request)
finally:
try:
self.sched.zk.unlockNodeRequest(request)
except Exception:
self.log.exception("Unable to unlock node request %s", request)
log.exception("Unable to unlock node request %s", request)
def holdNodeSet(self, nodeset, autohold_key):
'''
@ -218,12 +222,13 @@ class Nodepool(object):
raise
def _updateNodeRequest(self, request, deleted):
log = get_annotated_logger(self.log, request.event_id)
# Return False to indicate that we should stop watching the
# node.
self.log.debug("Updating node request %s" % (request,))
log.debug("Updating node request %s", request)
if request.uid not in self.requests:
self.log.debug("Request %s is unknown" % (request.uid,))
log.debug("Request %s is unknown", request.uid)
return False
if request.canceled:
@ -233,11 +238,11 @@ class Nodepool(object):
# TODOv3(jeblair): handle allocation failure
if deleted:
self.log.debug("Resubmitting lost node request %s" % (request,))
log.debug("Resubmitting lost node request %s", request)
request.id = None
self.sched.zk.submitNodeRequest(request, self._updateNodeRequest)
elif request.state in (model.STATE_FULFILLED, model.STATE_FAILED):
self.log.info("Node request %s %s" % (request, request.state))
log.info("Node request %s %s", request, request.state)
# Give our results to the scheduler.
self.sched.onNodesProvisioned(request)
@ -251,20 +256,22 @@ class Nodepool(object):
return True
def acceptNodes(self, request, request_id):
log = get_annotated_logger(self.log, request.event_id)
# Called by the scheduler when it wants to accept and lock
# nodes for (potential) use. Return False if there is a
# problem with the request (canceled or retrying), True if it
# is ready to be acted upon (success or failure).
self.log.info("Accepting node request %s" % (request,))
log.info("Accepting node request %s", request)
if request_id != request.id:
self.log.info("Skipping node accept for %s (resubmitted as %s)",
request_id, request.id)
log.info("Skipping node accept for %s (resubmitted as %s)",
request_id, request.id)
return False
if request.canceled:
self.log.info("Ignoring canceled node request %s" % (request,))
log.info("Ignoring canceled node request %s", request)
# The request was already deleted when it was canceled
return False
@ -281,8 +288,8 @@ class Nodepool(object):
# nodes in that situation.
try:
if not self.sched.zk.nodeRequestExists(request):
self.log.info("Request %s no longer exists, resubmitting",
request.id)
log.info("Request %s no longer exists, resubmitting",
request.id)
request.id = None
request.state = model.STATE_REQUESTED
self.requests[request.uid] = request
@ -295,7 +302,7 @@ class Nodepool(object):
# request probably doesn't make sense at this point in time as it
# is likely to directly fail again. So just log the problem
# with zookeeper and fail here.
self.log.exception("Error getting node request %s:" % request_id)
log.exception("Error getting node request %s:", request_id)
request.failed = True
return True
@ -306,16 +313,16 @@ class Nodepool(object):
self.lockNodeSet(request.nodeset, request.id)
locked = True
except Exception:
self.log.exception("Error locking nodes:")
log.exception("Error locking nodes:")
request.failed = True
# Regardless of whether locking (or even the request)
# succeeded, delete the request.
self.log.debug("Deleting node request %s" % (request,))
log.debug("Deleting node request %s", request)
try:
self.sched.zk.deleteNodeRequest(request)
except Exception:
self.log.exception("Error deleting node request:")
log.exception("Error deleting node request:")
request.failed = True
# If deleting the request failed, and we did lock the
# nodes, unlock the nodes since we're not going to use

15
zuul/scheduler.py
View File

@ -1327,29 +1327,30 @@ class Scheduler(threading.Thread):
request = event.request
request_id = event.request_id
build_set = request.build_set
log = get_annotated_logger(self.log, request.event_id)
ready = self.nodepool.acceptNodes(request, request_id)
if not ready:
return
if build_set is not build_set.item.current_build_set:
self.log.warning("Build set %s is not current "
"for node request %s", build_set, request)
log.warning("Build set %s is not current "
"for node request %s", build_set, request)
if request.fulfilled:
self.nodepool.returnNodeSet(request.nodeset)
return
if request.job.name not in [x.name for x in build_set.item.getJobs()]:
self.log.warning("Item %s does not contain job %s "
"for node request %s",
build_set.item, request.job.name, request)
log.warning("Item %s does not contain job %s "
"for node request %s",
build_set.item, request.job.name, request)
build_set.removeJobNodeRequest(request.job.name)
if request.fulfilled:
self.nodepool.returnNodeSet(request.nodeset)
return
pipeline = build_set.item.pipeline
if not pipeline:
self.log.warning("Build set %s is not associated with a pipeline "
"for node request %s", build_set, request)
log.warning("Build set %s is not associated with a pipeline "
"for node request %s", build_set, request)
if request.fulfilled:
self.nodepool.returnNodeSet(request.nodeset)
return