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set instance capacity to 0 on celery shutdown signal

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This commit is contained in:
AlanCoding 2017-07-28 10:57:18 -04:00
parent 368ff8a4fb
commit aff07747f8
1 changed files with 21 additions and 6 deletions
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27
awx/main/tasks.py
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@ -29,7 +29,7 @@ except:
# Celery
from celery import Task, task
from celery.signals import celeryd_init, worker_process_init
from celery.signals import celeryd_init, worker_process_init, worker_shutdown
# Django
from django.conf import settings
@ -98,8 +98,25 @@ def celery_startup(conf=None, **kwargs):
@worker_process_init.connect
def task_set_logger_pre_run(*args, **kwargs):
cache.close()
configure_external_logger(settings, is_startup=False)
try:
cache.close()
configure_external_logger(settings, is_startup=False)
except:
# General exception because LogErrorsTask not used with celery signals
logger.exception('Encountered error on initial log configuration.')
@worker_shutdown.connect
def inform_cluster_of_shutdown(*args, **kwargs):
try:
this_inst = Instance.objects.get(hostname=settings.CLUSTER_HOST_ID)
this_inst.capacity = 0 # No thank you to new jobs while shut down
this_inst.save(update_fields=['capacity', 'modified'])
logger.warning('Normal shutdown signal for instance {}, '
'removed self from capacity pool.'.format(this_inst.hostname))
except:
# General exception because LogErrorsTask not used with celery signals
logger.exception('Encountered problem with normal shutdown signal.')
@task(queue='tower_broadcast_all', bind=True, base=LogErrorsTask)
@ -214,10 +231,8 @@ def cluster_node_heartbeat(self):
other_inst.version,
this_inst.hostname,
this_inst.version))
# Set the capacity to zero to ensure no Jobs get added to this instance.
# Shutdown signal will set the capacity to zero to ensure no Jobs get added to this instance.
# The heartbeat task will reset the capacity to the system capacity after upgrade.
this_inst.capacity = 0
this_inst.save(update_fields=['capacity'])
stop_local_services(['uwsgi', 'celery', 'beat', 'callback', 'fact'])
# We wait for the Popen call inside stop_local_services above
# so the line below will rarely if ever be executed.