charm-ceph-osd/actions/blacklist.py
Alex Kavanagh 4e1ecd55b8 Bring ceph-osd to Python 3
* Synced version of charm-helpers
* Synced version of charms.ceph to bring in Py3 compatible library
  methods.

Change-Id: I5ac45740f48a71d9cb0c5943472fc8590a723514
2017-11-17 12:13:54 +00:00

103 lines
2.7 KiB
Python
Executable File

#!/usr/bin/env python3
#
# Copyright 2017 Canonical Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import os
import sys
sys.path.append('hooks')
import charmhelpers.core.hookenv as hookenv
import charmhelpers.core.unitdata as unitdata
BLACKLIST_KEY = 'osd-blacklist'
class Error(Exception):
def __init__(self, message):
self.message = message
def __str__(self):
return repr(self.message)
def get_devices():
"""Parse 'osd-devices' action parameter, returns list."""
devices = []
for path in hookenv.action_get('osd-devices').split(' '):
path = path.strip()
if not os.path.isabs(path):
raise Error('{}: Not absolute path.'.format(path))
devices.append(path)
return devices
def blacklist_add():
"""
Add devices given in 'osd-devices' action parameter to
unit-local devices blacklist.
"""
db = unitdata.kv()
blacklist = db.get(BLACKLIST_KEY, [])
for device in get_devices():
if not os.path.exists(device):
raise Error('{}: No such file or directory.'.format(device))
if device not in blacklist:
blacklist.append(device)
db.set(BLACKLIST_KEY, blacklist)
db.flush()
def blacklist_remove():
"""
Remove devices given in 'osd-devices' action parameter from
unit-local devices blacklist.
"""
db = unitdata.kv()
blacklist = db.get(BLACKLIST_KEY, [])
for device in get_devices():
try:
blacklist.remove(device)
except ValueError:
raise Error('{}: Device not in blacklist.'.format(device))
db.set(BLACKLIST_KEY, blacklist)
db.flush()
# A dictionary of all the defined actions to callables
ACTIONS = {
"blacklist-add-disk": blacklist_add,
"blacklist-remove-disk": blacklist_remove,
}
def main(args):
"""Main program"""
action_name = os.path.basename(args[0])
try:
action = ACTIONS[action_name]
except KeyError:
return "Action {} undefined".format(action_name)
else:
try:
action()
except Exception as e:
hookenv.action_fail("Action {} failed: {}"
"".format(action_name, str(e)))
if __name__ == "__main__":
sys.exit(main(sys.argv))