103 lines
2.7 KiB
Python
Executable File
103 lines
2.7 KiB
Python
Executable File
#!/usr/bin/env python3
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#
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# Copyright 2017 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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sys.path.append('hooks')
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import charmhelpers.core.hookenv as hookenv
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import charmhelpers.core.unitdata as unitdata
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BLACKLIST_KEY = 'osd-blacklist'
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class Error(Exception):
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def __init__(self, message):
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self.message = message
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def __str__(self):
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return repr(self.message)
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def get_devices():
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"""Parse 'osd-devices' action parameter, returns list."""
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devices = []
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for path in hookenv.action_get('osd-devices').split(' '):
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path = path.strip()
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if not os.path.isabs(path):
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raise Error('{}: Not absolute path.'.format(path))
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devices.append(path)
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return devices
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def blacklist_add():
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"""
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Add devices given in 'osd-devices' action parameter to
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unit-local devices blacklist.
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"""
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db = unitdata.kv()
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blacklist = db.get(BLACKLIST_KEY, [])
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for device in get_devices():
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if not os.path.exists(device):
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raise Error('{}: No such file or directory.'.format(device))
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if device not in blacklist:
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blacklist.append(device)
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db.set(BLACKLIST_KEY, blacklist)
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db.flush()
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def blacklist_remove():
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"""
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Remove devices given in 'osd-devices' action parameter from
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unit-local devices blacklist.
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"""
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db = unitdata.kv()
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blacklist = db.get(BLACKLIST_KEY, [])
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for device in get_devices():
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try:
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blacklist.remove(device)
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except ValueError:
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raise Error('{}: Device not in blacklist.'.format(device))
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db.set(BLACKLIST_KEY, blacklist)
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db.flush()
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# A dictionary of all the defined actions to callables
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ACTIONS = {
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"blacklist-add-disk": blacklist_add,
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"blacklist-remove-disk": blacklist_remove,
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}
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def main(args):
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"""Main program"""
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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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return "Action {} undefined".format(action_name)
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else:
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try:
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action()
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except Exception as e:
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hookenv.action_fail("Action {} failed: {}"
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"".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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