def cluster_node_heartbeat():
logger.debug("Cluster node heartbeat task.")
nowtime = now()
instance_list = list(Instance.objects.all())
this_inst = None
lost_instances = []
for inst in instance_list:
if inst.hostname == settings.CLUSTER_HOST_ID:
this_inst = inst
break
inspect_execution_nodes(instance_list)
for inst in list(instance_list):
if inst == this_inst:
continue
if inst.is_lost(ref_time=nowtime):
lost_instances.append(inst)
instance_list.remove(inst)
if this_inst:
startup_event = this_inst.is_lost(ref_time=nowtime)
this_inst.local_health_check()
if startup_event and this_inst.capacity != 0:
logger.warning('Rejoining the cluster as instance {}.'.format(this_inst.hostname))
return
else:
raise RuntimeError("Cluster Host Not Found: {}".format(settings.CLUSTER_HOST_ID))
# IFF any node has a greater version than we do, then we'll shutdown services
for other_inst in instance_list:
if other_inst.node_type in ('execution', 'hop'):
continue
if other_inst.version == "" or other_inst.version.startswith('ansible-runner'):
continue
if Version(other_inst.version.split('-', 1)[0]) > Version(awx_application_version.split('-', 1)[0]) and not settings.DEBUG:
logger.error(
"Host {} reports version {}, but this node {} is at {}, shutting down".format(
other_inst.hostname, other_inst.version, this_inst.hostname, this_inst.version
)
)
# 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.
stop_local_services(communicate=False)
raise RuntimeError("Shutting down.")
for other_inst in lost_instances:
try:
reaper.reap(other_inst)
except Exception:
logger.exception('failed to reap jobs for {}'.format(other_inst.hostname))
try:
if settings.AWX_AUTO_DEPROVISION_INSTANCES:
deprovision_hostname = other_inst.hostname
other_inst.delete()
logger.info("Host {} Automatically Deprovisioned.".format(deprovision_hostname))
elif other_inst.capacity != 0 or (not other_inst.errors):
other_inst.mark_offline(errors=_('Another cluster node has determined this instance to be unresponsive'))
logger.error("Host {} last checked in at {}, marked as lost.".format(other_inst.hostname, other_inst.last_seen))
except DatabaseError as e:
if 'did not affect any rows' in str(e):
logger.debug('Another instance has marked {} as lost'.format(other_inst.hostname))
else:
logger.exception('Error marking {} as lost'.format(other_inst.hostname))
def cluster_node_heartbeat(dispatch_time=None, worker_tasks=None):
logger.debug("Cluster node heartbeat task.")
nowtime = now()
instance_list = list(Instance.objects.all())
this_inst = None
lost_instances = []
for inst in instance_list:
if inst.hostname == settings.CLUSTER_HOST_ID:
this_inst = inst
break
inspect_execution_nodes(instance_list)
for inst in list(instance_list):
if inst == this_inst:
continue
if inst.is_lost(ref_time=nowtime):
lost_instances.append(inst)
instance_list.remove(inst)
if this_inst:
startup_event = this_inst.is_lost(ref_time=nowtime)
last_last_seen = this_inst.last_seen
this_inst.local_health_check()
if startup_event and this_inst.capacity != 0:
logger.warning(
f'Rejoining the cluster as instance {this_inst.hostname}. Prior last_seen {last_last_seen}'
)
return
elif not last_last_seen:
logger.warning(
f'Instance does not have recorded last_seen, updating to {nowtime}'
)
elif (nowtime - last_last_seen) > timedelta(
seconds=settings.CLUSTER_NODE_HEARTBEAT_PERIOD + 2):
logger.warning(
f'Heartbeat skew - interval={(nowtime - last_last_seen).total_seconds():.4f}, expected={settings.CLUSTER_NODE_HEARTBEAT_PERIOD}'
)
else:
if settings.AWX_AUTO_DEPROVISION_INSTANCES:
(changed, this_inst) = Instance.objects.register(
ip_address=os.environ.get('MY_POD_IP'),
node_type='control',
uuid=settings.SYSTEM_UUID)
if changed:
logger.warning(
f'Recreated instance record {this_inst.hostname} after unexpected removal'
)
this_inst.local_health_check()
else:
raise RuntimeError("Cluster Host Not Found: {}".format(
settings.CLUSTER_HOST_ID))
# IFF any node has a greater version than we do, then we'll shutdown services
for other_inst in instance_list:
if other_inst.node_type in ('execution', 'hop'):
continue
if other_inst.version == "" or other_inst.version.startswith(
'ansible-runner'):
continue
if Version(other_inst.version.split('-', 1)[0]) > Version(
awx_application_version.split('-',
1)[0]) and not settings.DEBUG:
logger.error(
"Host {} reports version {}, but this node {} is at {}, shutting down"
.format(other_inst.hostname, other_inst.version,
this_inst.hostname, this_inst.version))
# 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.
stop_local_services(communicate=False)
raise RuntimeError("Shutting down.")
for other_inst in lost_instances:
try:
explanation = "Job reaped due to instance shutdown"
reaper.reap(other_inst, job_explanation=explanation)
reaper.reap_waiting(other_inst,
grace_period=0,
job_explanation=explanation)
except Exception:
logger.exception('failed to reap jobs for {}'.format(
other_inst.hostname))
try:
if settings.AWX_AUTO_DEPROVISION_INSTANCES:
deprovision_hostname = other_inst.hostname
other_inst.delete()
logger.info("Host {} Automatically Deprovisioned.".format(
deprovision_hostname))
elif other_inst.capacity != 0 or (not other_inst.errors):
other_inst.mark_offline(errors=_(
'Another cluster node has determined this instance to be unresponsive'
))
logger.error(
"Host {} last checked in at {}, marked as lost.".format(
other_inst.hostname, other_inst.last_seen))
except DatabaseError as e:
if 'did not affect any rows' in str(e):
logger.debug('Another instance has marked {} as lost'.format(
other_inst.hostname))
else:
logger.exception('Error marking {} as lost'.format(
other_inst.hostname))
# Run local reaper
if worker_tasks is not None:
active_task_ids = []
for task_list in worker_tasks.values():
active_task_ids.extend(task_list)
reaper.reap(instance=this_inst, excluded_uuids=active_task_ids)
if max(len(task_list) for task_list in worker_tasks.values()) <= 1:
reaper.reap_waiting(instance=this_inst,
excluded_uuids=active_task_ids,
ref_time=datetime.fromisoformat(dispatch_time))