129 lines
3.6 KiB
Python
129 lines
3.6 KiB
Python
#!/usr/bin/env python
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# Copyright 2012 OpenStack Foundation
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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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"""
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This script is designed to cleanup any VHDs (and their descendents) which have
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a bad parent pointer.
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The script needs to be run in the dom0 of the affected host.
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The available actions are:
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- print: display the filenames of the affected VHDs
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- delete: remove the affected VHDs
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- move: move the affected VHDs out of the SR into another directory
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"""
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import glob
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import os
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import subprocess
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import sys
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class ExecutionFailed(Exception):
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def __init__(self, returncode, stdout, stderr, max_stream_length=32):
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self.returncode = returncode
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self.stdout = stdout[:max_stream_length]
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self.stderr = stderr[:max_stream_length]
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self.max_stream_length = max_stream_length
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def __repr__(self):
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return "<ExecutionFailed returncode=%s out='%s' stderr='%s'>" % (
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self.returncode, self.stdout, self.stderr)
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__str__ = __repr__
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def execute(cmd, ok_exit_codes=None):
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if ok_exit_codes is None:
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ok_exit_codes = [0]
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proc = subprocess.Popen(
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cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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(stdout, stderr) = proc.communicate()
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if proc.returncode not in ok_exit_codes:
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raise ExecutionFailed(proc.returncode, stdout, stderr)
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return proc.returncode, stdout, stderr
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def usage():
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print "usage: %s <SR PATH> <print|delete|move>" % sys.argv[0]
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sys.exit(1)
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def main():
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if len(sys.argv) < 3:
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usage()
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sr_path = sys.argv[1]
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action = sys.argv[2]
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if action not in ('print', 'delete', 'move'):
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usage()
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if action == 'move':
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if len(sys.argv) < 4:
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print "error: must specify where to move bad VHDs"
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sys.exit(1)
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bad_vhd_path = sys.argv[3]
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if not os.path.exists(bad_vhd_path):
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os.makedirs(bad_vhd_path)
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bad_leaves = []
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descendents = {}
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for fname in glob.glob(os.path.join(sr_path, "*.vhd")):
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(returncode, stdout, stderr) = execute(
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['vhd-util', 'query', '-n', fname, '-p'], ok_exit_codes=[0, 22])
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stdout = stdout.strip()
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if stdout.endswith('.vhd'):
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try:
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descendents[stdout].append(fname)
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except KeyError:
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descendents[stdout] = [fname]
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elif 'query failed' in stdout:
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bad_leaves.append(fname)
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def walk_vhds(root):
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yield root
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if root in descendents:
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for child in descendents[root]:
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for vhd in walk_vhds(child):
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yield vhd
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for bad_leaf in bad_leaves:
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for bad_vhd in walk_vhds(bad_leaf):
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print bad_vhd
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if action == "print":
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pass
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elif action == "delete":
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os.unlink(bad_vhd)
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elif action == "move":
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new_path = os.path.join(bad_vhd_path,
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os.path.basename(bad_vhd))
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os.rename(bad_vhd, new_path)
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else:
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raise Exception("invalid action %s" % action)
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if __name__ == '__main__':
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main()
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