def spawn_appserver(self,
mark_active_on_success=False,
num_attempts=1,
success_tag=None,
failure_tag=None):
"""
Provision a new AppServer
Wrapper around the spawning function to allow for multiple attempts
Optionally mark the new AppServer as active when the provisioning completes.
Optionally retry up to 'num_attempts' times.
Optionally tag the instance with 'success_tag' when the deployment succeeds,
or failure_tag if it fails.
Returns the ID of the new AppServer or None in case of failure.
"""
for attempt in range(num_attempts):
self.logger.info("Spawning new AppServer, attempt {} of {}".format(
attempt + 1, num_attempts))
app_server = self._spawn_appserver()
if app_server and app_server.provision():
break
self.logger.error('Failed to provision new app server')
else:
self.logger.error(
'Failed to provision new app server after {} attempts'.format(
num_attempts))
if failure_tag:
self.tags.add(failure_tag)
if success_tag:
self.tags.remove(success_tag)
# Warn spawn failed after given attempts
appserver_spawned.send(sender=self.__class__,
instance=self,
appserver=None)
return
self.logger.info('Provisioned new app server, %s', app_server.name)
self.successfully_provisioned = True
self.save()
if failure_tag:
self.tags.remove(failure_tag)
if success_tag:
self.tags.add(success_tag)
if mark_active_on_success:
# use task.make_appserver_active to allow disabling others
app_server.make_active()
appserver_spawned.send(sender=self.__class__,
instance=self,
appserver=app_server)
return app_server.pk
def spawn_appserver(self,
mark_active_on_success=False,
num_attempts=1,
success_tag=None,
failure_tag=None,
deployment_id=None):
"""
Provision a new AppServer
Wrapper around the spawning function to allow for multiple attempts
Optionally mark the new AppServer as active when the provisioning completes.
Optionally retry up to 'num_attempts' times.
Optionally tag the instance with 'success_tag' when the deployment succeeds,
or failure_tag if it fails.
Returns the ID of the new AppServer or None in case of failure.
"""
# pylint: disable=cyclic-import, useless-suppression
from instance.models.openedx_deployment import OpenEdXDeployment
for attempt in range(num_attempts):
self.logger.info("Spawning new AppServer, attempt {} of {}".format(
attempt + 1, num_attempts))
app_server = self._spawn_appserver(deployment_id=deployment_id)
if app_server and app_server.provision():
break
# Don't retry if the deployment was explicitly cancelled.
if deployment_id:
deployment = OpenEdXDeployment.objects.get(pk=deployment_id)
if deployment.cancelled:
self.logger.info('Deployment %s was cancelled, returning.',
deployment_id)
return None
self.logger.error('Failed to provision new app server')
else:
self.logger.error(
'Failed to provision new app server after {} attempts'.format(
num_attempts))
if failure_tag:
self.tags.add(failure_tag)
if success_tag:
self.tags.remove(success_tag)
# Warn spawn failed after given attempts
appserver_spawned.send(sender=self.__class__,
instance=self,
appserver=None)
return None
self.logger.info('Provisioned new app server, %s', app_server.name)
self.successfully_provisioned = True
self.save()
if failure_tag:
self.tags.remove(failure_tag)
if success_tag:
self.tags.add(success_tag)
if mark_active_on_success:
# use task.make_appserver_active to allow disabling others
app_server.make_active()
appserver_spawned.send(sender=self.__class__,
instance=self,
appserver=app_server)
return app_server.pk
