136 lines
3.9 KiB
Python
Executable File
136 lines
3.9 KiB
Python
Executable File
#!/usr/bin/python3
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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 argparse
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import os
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import sys
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import yaml
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_path = os.path.dirname(os.path.realpath(__file__))
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_root = os.path.abspath(os.path.join(_path, '..'))
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def _add_path(path):
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if path not in sys.path:
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sys.path.insert(1, path)
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_add_path(_root)
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from charmhelpers.core.host import service_pause, service_resume
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from charmhelpers.core.hookenv import action_fail
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from charmhelpers.core.unitdata import HookData, kv
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from charmhelpers.contrib.openstack.utils import (
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get_os_codename_package,
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set_os_workload_status,
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CompareOpenStackReleases,
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)
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from lib.swift_storage_utils import (
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assess_status,
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REQUIRED_INTERFACES,
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SWIFT_SVCS,
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)
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from hooks.swift_storage_hooks import (
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CONFIGS,
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)
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def _get_services():
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"""Return a list of services that need to be (un)paused."""
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services = SWIFT_SVCS[:]
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# Before Icehouse there was no swift-container-sync
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_os_release = get_os_codename_package("swift-container")
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if CompareOpenStackReleases(_os_release) < "icehouse":
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services.remove("swift-container-sync")
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return services
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def get_action_parser(actions_yaml_path, action_name,
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get_services=_get_services):
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"""Make an argparse.ArgumentParser seeded from actions.yaml definitions."""
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with open(actions_yaml_path) as fh:
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doc = yaml.load(fh)[action_name]["description"]
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parser = argparse.ArgumentParser(description=doc)
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parser.add_argument("--services", default=get_services())
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# TODO: Add arguments for params defined in the actions.yaml
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return parser
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def pause(args):
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"""Pause all the swift services.
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@raises Exception if any services fail to stop
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"""
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for service in args.services:
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stopped = service_pause(service)
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if not stopped:
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raise Exception("{} didn't stop cleanly.".format(service))
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with HookData()():
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kv().set('unit-paused', True)
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set_os_workload_status(CONFIGS, REQUIRED_INTERFACES,
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charm_func=assess_status)
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def resume(args):
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"""Resume all the swift services.
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@raises Exception if any services fail to start
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"""
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for service in args.services:
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started = service_resume(service)
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if not started:
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raise Exception("{} didn't start cleanly.".format(service))
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with HookData()():
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kv().set('unit-paused', False)
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set_os_workload_status(CONFIGS, REQUIRED_INTERFACES,
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charm_func=assess_status)
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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}
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def main(argv):
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action_name = _get_action_name()
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actions_yaml_path = _get_actions_yaml_path()
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parser = get_action_parser(actions_yaml_path, action_name)
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args = parser.parse_args(argv)
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try:
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action = ACTIONS[action_name]
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except KeyError:
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return "Action {} undefined".format(action_name)
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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(str(e))
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def _get_action_name():
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"""Return the name of the action."""
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return os.path.basename(__file__)
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def _get_actions_yaml_path():
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"""Return the path to actions.yaml"""
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cwd = os.path.dirname(__file__)
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return os.path.join(cwd, "..", "actions.yaml")
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if __name__ == "__main__":
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sys.exit(main(sys.argv[1:]))
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