147 lines
5.1 KiB
Python
147 lines
5.1 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright (C) 2012 Yahoo! Inc. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from tempfile import TemporaryFile
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import time
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from devstack import component as comp
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from devstack import log as logging
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from devstack import settings
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from devstack import shell as sh
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from devstack import trace as tr
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#id
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TYPE = settings.RABBIT
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LOG = logging.getLogger("devstack.components.rabbit")
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#hopefully these are distro independent..
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START_CMD = ['service', "rabbitmq-server", "start"]
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STOP_CMD = ['service', "rabbitmq-server", "stop"]
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STATUS_CMD = ['service', "rabbitmq-server", "status"]
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RESTART_CMD = ['service', "rabbitmq-server", "restart"]
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PWD_CMD = ['rabbitmqctl', 'change_password', 'guest']
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#the pkg json files rabbit mq server requires for installation
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REQ_PKGS = ['rabbitmq.json']
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#default password
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RESET_BASE_PW = ''
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#how long we wait for rabbitmq to start up before doing commands on it
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WAIT_ON_TIME = settings.WAIT_ALIVE_SECS
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#config keys we warm up so u won't be prompted later
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WARMUP_PWS = ['rabbit']
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class RabbitUninstaller(comp.PkgUninstallComponent):
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def __init__(self, *args, **kargs):
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comp.PkgUninstallComponent.__init__(self, TYPE, *args, **kargs)
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self.runtime = RabbitRuntime(*args, **kargs)
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def pre_uninstall(self):
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try:
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self.runtime.restart()
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LOG.info("Attempting to reset the rabbit-mq guest password to \"%s\"", RESET_BASE_PW)
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cmd = PWD_CMD + [RESET_BASE_PW]
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sh.execute(*cmd, run_as_root=True)
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except IOError:
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LOG.warn(("Could not reset the rabbit-mq password. You might have to manually "
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"reset the password to \"%s\" before the next install") % (RESET_BASE_PW))
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class RabbitInstaller(comp.PkgInstallComponent):
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def __init__(self, *args, **kargs):
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comp.PkgInstallComponent.__init__(self, TYPE, *args, **kargs)
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self.runtime = RabbitRuntime(*args, **kargs)
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def warm_configs(self):
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for pw_key in WARMUP_PWS:
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self.cfg.get("passwords", pw_key)
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def _setup_pw(self):
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LOG.info("Setting up your rabbit-mq guest password.")
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self.runtime.restart()
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passwd = self.cfg.get("passwords", "rabbit")
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cmd = PWD_CMD + [passwd]
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sh.execute(*cmd, run_as_root=True)
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LOG.info("Restarting so that your rabbit-mq guest password is reflected.")
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self.runtime.restart()
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def post_install(self):
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comp.PkgInstallComponent.post_install(self)
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self._setup_pw()
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def _get_pkgs(self):
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return list(REQ_PKGS)
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class RabbitRuntime(comp.EmptyRuntime):
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def __init__(self, *args, **kargs):
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comp.EmptyRuntime.__init__(self, TYPE, *args, **kargs)
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self.tracereader = tr.TraceReader(self.tracedir, tr.IN_TRACE)
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def start(self):
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if self.status() != comp.STATUS_STARTED:
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self._run_cmd(START_CMD)
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return 1
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else:
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return 0
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def status(self):
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#this has got to be the worst status output
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#i have ever seen (its like a weird mix json+crap)
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run_result = sh.execute(*STATUS_CMD,
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check_exit_code=False,
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run_as_root=True)
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if not run_result:
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return comp.STATUS_UNKNOWN
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(sysout, stderr) = run_result
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combined = str(sysout) + str(stderr)
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combined = combined.lower()
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if combined.find('nodedown') != -1 or combined.find("unable to connect to node") != -1:
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return comp.STATUS_STOPPED
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elif combined.find('running_applications') != -1:
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return comp.STATUS_STARTED
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else:
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return comp.STATUS_UNKNOWN
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def _run_cmd(self, cmd, check_exit=True):
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#this seems to fix one of the bugs with rabbit mq starting and stopping
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#not cool, possibly connected to the following bugs:
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#https://bugs.launchpad.net/ubuntu/+source/rabbitmq-server/+bug/878597
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#https://bugs.launchpad.net/ubuntu/+source/rabbitmq-server/+bug/878600
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#
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#rhel seems to have this bug also...
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with TemporaryFile() as f:
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return sh.execute(*cmd, run_as_root=True,
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stdout_fh=f, stderr_fh=f,
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check_exit_code=check_exit)
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def restart(self):
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LOG.info("Restarting rabbit-mq.")
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self._run_cmd(RESTART_CMD)
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LOG.info("Please wait %s seconds while it starts up." % (WAIT_ON_TIME))
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time.sleep(WAIT_ON_TIME)
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return 1
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def stop(self):
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if self.status() != comp.STATUS_STOPPED:
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self._run_cmd(STOP_CMD)
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return 1
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else:
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return 0
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