c32211c8e1
All contributions to this charm where made under Canonical copyright; switch to Apache-2.0 license as agreed so we can move forward with official project status. In order to make this change, this commit also drops the inclusion of upstart configurations for very early versions of Ceph (argonaut), as they are no longer required. Change-Id: I9609dd79855b545a2c5adc12b7ac573c6f246d48
97 lines
3.1 KiB
Python
Executable File
97 lines
3.1 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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from charmhelpers.core.hookenv import action_get, log, config, action_fail
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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 ceph
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"""
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Given a OSD number this script will attempt to turn that back into a mount
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point and then replace the OSD with a new one.
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"""
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def get_disk_stats():
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try:
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# https://www.kernel.org/doc/Documentation/iostats.txt
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with open('/proc/diskstats', 'r') as diskstats:
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return diskstats.readlines()
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except IOError as err:
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log('Could not open /proc/diskstats. Error: {}'.format(err.message))
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action_fail('replace-osd failed because /proc/diskstats could not '
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'be opened {}'.format(err.message))
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return None
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def lookup_device_name(major_number, minor_number):
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"""
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:param major_number: int. The major device number
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:param minor_number: int. The minor device number
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:return: string. The name of the device. Example: /dev/sda.
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Returns None on error.
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"""
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diskstats = get_disk_stats()
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for line in diskstats:
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parts = line.split()
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if not len(parts) > 3:
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# Skip bogus lines
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continue
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try:
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if int(parts[0]) is major_number and int(parts[1]) is \
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minor_number:
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# Found our device. Return its name
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return parts[2]
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except ValueError as value_err:
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log('Could not convert {} or {} into an integer. Error: {}'
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.format(parts[0], parts[1], value_err.message))
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continue
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return None
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def get_device_number(osd_number):
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"""
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This function will return a tuple of (major_number, minor_number)
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device number for the given osd.
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:param osd_number: int
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:rtype : (major_number,minor_number)
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"""
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path = "/var/lib/ceph/osd/ceph-{}".format(osd_number)
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info = os.lstat(path)
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major_number = os.major(info.st_dev)
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minor_number = os.minor(info.st_dev)
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return major_number, minor_number
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if __name__ == '__main__':
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dead_osd_number = action_get("osd-number")
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replacement_device = action_get("replacement-device")
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major, minor = get_device_number(dead_osd_number)
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device_name = lookup_device_name(major, minor)
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osd_format = config('osd-format')
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osd_journal = config('osd-journal')
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ceph.replace_osd(dead_osd_number=dead_osd_number,
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dead_osd_device="/dev/{}".format(device_name),
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new_osd_device=replacement_device,
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osd_format=osd_format,
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osd_journal=osd_journal)
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