115 lines
3.3 KiB
Python
Executable File
115 lines
3.3 KiB
Python
Executable File
#!/usr/bin/python
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#
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# Copyright 2016 Canonical Ltd
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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 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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import sys
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import re
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from subprocess import (
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check_output,
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CalledProcessError,
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)
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sys.path.append('hooks/')
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from charmhelpers.core.hookenv import (
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action_fail,
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action_set,
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action_get,
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)
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from rabbit_utils import (
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ConfigRenderer,
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CONFIG_FILES,
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pause_unit_helper,
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resume_unit_helper,
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)
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def pause(args):
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"""Pause the RabbitMQ services.
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@raises Exception should the service fail to stop.
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"""
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pause_unit_helper(ConfigRenderer(CONFIG_FILES))
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def resume(args):
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"""Resume the RabbitMQ services.
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@raises Exception should the service fail to start."""
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resume_unit_helper(ConfigRenderer(CONFIG_FILES))
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def cluster_status(args):
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"""Return the output of 'rabbitmqctl cluster_status'."""
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try:
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clusterstat = check_output(['rabbitmqctl', 'cluster_status'],
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universal_newlines=True)
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action_set({'output': clusterstat})
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except CalledProcessError as e:
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action_set({'output': e.output})
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action_fail('Failed to run rabbitmqctl cluster_status')
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except Exception:
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raise
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def check_queues(args):
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"""Check for queues with greater than N messages.
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Return those queues to the user."""
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queue_depth = (action_get('queue-depth'))
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vhost = (action_get('vhost'))
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result = []
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# rabbitmqctl's output contains lines we don't want, such as
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# 'Listing queues ..' and '...done.', which may vary by release.
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# Actual queue results *should* always look like 'test\t0'
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queue_pattern = re.compile('.*\t[0-9]*')
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try:
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queues = check_output(['rabbitmqctl', 'list_queues',
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'-p', vhost]).split('\n')
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result = list({queue: size for (queue, size) in
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[i.split('\t') for i in queues
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if re.search(queue_pattern, i)]
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if int(size) >= queue_depth})
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action_set({'output': result, 'outcome': 'Success'})
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except CalledProcessError as e:
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action_set({'output': e.output})
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action_fail('Failed to run rabbitmqctl list_queues')
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# A dictionary of all the defined actions to callables (which take
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# parsed arguments).
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ACTIONS = {"pause": pause, "resume": resume, "cluster-status": cluster_status,
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"check-queues": check_queues}
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def main(args):
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action_name = os.path.basename(args[0])
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try:
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action = ACTIONS[action_name]
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except KeyError:
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s = "Action {} undefined".format(action_name)
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action_fail(s)
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return s
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else:
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try:
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action(args)
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except Exception as e:
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action_fail("Action {} failed: {}".format(action_name, str(e)))
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if __name__ == "__main__":
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sys.exit(main(sys.argv))
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