heat/heat/common/notify.py
Lon Hohberger cceda95a35 Add systemd notification support to heat
This mirrors work done in other OpenStack projects
to add systemd notification support to signal that
a given process is ready to accept requests.

The heat-api, heat-api-cfn, heat-engine, and
heat-api-cloudwatch processes are all covered by
a new, single, 'onready' configuration file option.

Additionally, the sample configuration file has been
updated to match.

Implements: blueprint systemd-integration

Change-Id: I90d2b915e2568a65ed9ed78923c9982e19f9c948
Signed-off-by: Lon Hohberger <lhh@redhat.com>
2014-02-19 09:43:44 -05:00

39 lines
1.3 KiB
Python

# Copyright 2014 Red Hat, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""
Startup notification using a shell script or systemd NOTIFY_SOCKET
style notification
"""
from heat.openstack.common import log as logging
from heat.openstack.common import importutils
from heat.openstack.common import processutils
logger = logging.getLogger(__name__)
def startup_notify(notify_param):
if not notify_param or notify_param == "":
return
try:
notifier = importutils.import_module(notify_param)
except ImportError:
try:
processutils.execute(notify_param, shell=True)
except Exception as e:
logger.error(_('Failed to execute onready command: %s') % str(e))
else:
notifier.notify()