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consolidate celery init signals to avoid an instance registration race

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This commit is contained in:
Ryan Petrello 2018-09-07 09:29:27 -04:00
parent b9b9fc1934
commit 43aa0fc741
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1 changed files with 26 additions and 29 deletions
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55
awx/main/tasks.py
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@ -32,7 +32,7 @@ except Exception:
from kombu import Queue, Exchange
from kombu.common import Broadcast
from celery import Task, shared_task
from celery.signals import celeryd_init, worker_shutdown, celeryd_after_setup
from celery.signals import celeryd_init, worker_shutdown
# Django
from django.conf import settings
@ -108,6 +108,31 @@ def log_celery_failure(self, exc, task_id, args, kwargs, einfo):
@celeryd_init.connect
def celery_startup(conf=None, **kwargs):
#
# When celeryd starts, if the instance cannot be found in the database,
# automatically register it. This is mostly useful for openshift-based
# deployments where:
#
# 2 Instances come online
# Instance B encounters a network blip, Instance A notices, and
# deprovisions it
# Instance B's connectivity is restored, celeryd starts, and it
# re-registers itself
#
# In traditional container-less deployments, instances don't get
# deprovisioned when they miss their heartbeat, so this code is mostly a
# no-op.
#
if kwargs['instance'].hostname != 'celery@{}'.format(settings.CLUSTER_HOST_ID):
error = six.text_type('celery -n {} does not match settings.CLUSTER_HOST_ID={}').format(
instance.hostname, settings.CLUSTER_HOST_ID
)
logger.error(error)
raise RuntimeError(error)
(changed, tower_instance) = Instance.objects.get_or_register()
if changed:
logger.info(six.text_type("Registered tower node '{}'").format(tower_instance.hostname))
startup_logger = logging.getLogger('awx.main.tasks')
startup_logger.info("Syncing Schedules")
for sch in Schedule.objects.all():
@ -268,34 +293,6 @@ def handle_setting_changes(self, setting_keys):
cache.delete_many(cache_keys)
@celeryd_after_setup.connect
def auto_register_ha_instance(sender, instance, **kwargs):
#
# When celeryd starts, if the instance cannot be found in the database,
# automatically register it. This is mostly useful for openshift-based
# deployments where:
#
# 2 Instances come online
# Instance B encounters a network blip, Instance A notices, and
# deprovisions it
# Instance B's connectivity is restored, celeryd starts, and it
# re-registers itself
#
# In traditional container-less deployments, instances don't get
# deprovisioned when they miss their heartbeat, so this code is mostly a
# no-op.
#
if instance.hostname != 'celery@{}'.format(settings.CLUSTER_HOST_ID):
error = six.text_type('celery -n {} does not match settings.CLUSTER_HOST_ID={}').format(
instance.hostname, settings.CLUSTER_HOST_ID
)
logger.error(error)
raise RuntimeError(error)
(changed, tower_instance) = Instance.objects.get_or_register()
if changed:
logger.info(six.text_type("Registered tower node '{}'").format(tower_instance.hostname))
@shared_task(queue=settings.CELERY_DEFAULT_QUEUE)
def send_notifications(notification_list, job_id=None):
if not isinstance(notification_list, list):