ae4f836904
This patch adds daemon command line option to Marconi. This enables marconi server to run in background and thus allows marconi to run under devstack. Change-Id: If7da6a17db0005848fd5ac9f745d676f8212d9b7 Closes-Bug: #1287490
63 lines
2.1 KiB
Python
63 lines
2.1 KiB
Python
# Copyright (c) 2013 Red Hat, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import os
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from oslo.config import cfg
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from marconi.common import cli
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from marconi.queues import bootstrap
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@cli.runnable
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def run():
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# TODO(kgriffs): For now, we have to use the global config
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# to pick up common options from openstack.common.log, since
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# that module uses the global CONF instance exclusively.
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conf = cfg.CONF
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conf(project='marconi', prog='marconi-queues')
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server = bootstrap.Bootstrap(conf)
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# The following code is to daemonize marconi-server to avoid
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# an issue with wsgiref writing to stdout/stderr when we don't
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# want it to. This is specifically needed to allow marconi to
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# run under devstack, but it may also be useful for other scenarios.
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# Open /dev/zero and /dev/null for redirection.
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# Daemonizing marconi-server is needed *just* when running under devstack
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# and when marconi is invoked with `daemon` command line option.
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if conf.daemon:
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zerofd = os.open('/dev/zero', os.O_RDONLY)
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nullfd = os.open('/dev/null', os.O_WRONLY)
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# Close the stdthings and reassociate them with a non terminal
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os.dup2(zerofd, 0)
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os.dup2(nullfd, 1)
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os.dup2(nullfd, 2)
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# Detach process context, this requires 2 forks.
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try:
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pid = os.fork()
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if pid > 0:
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os._exit(0)
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except OSError:
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os._exit(1)
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try:
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pid = os.fork()
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if pid > 0:
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os._exit(0)
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except OSError:
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os._exit(2)
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server.run()
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