1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
#!/usr/bin/env python
# Copyright 2012 OpenStack Foundation
#
# 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.
"""
This script is designed to cleanup any VHDs (and their descendents) which have
a bad parent pointer.
The script needs to be run in the dom0 of the affected host.
The available actions are:
- print: display the filenames of the affected VHDs
- delete: remove the affected VHDs
- move: move the affected VHDs out of the SR into another directory
"""
import glob
import os
import subprocess
import sys
class ExecutionFailed(Exception):
def __init__(self, returncode, stdout, stderr, max_stream_length=32):
self.returncode = returncode
self.stdout = stdout[:max_stream_length]
self.stderr = stderr[:max_stream_length]
self.max_stream_length = max_stream_length
def __repr__(self):
return "<ExecutionFailed returncode=%s out='%s' stderr='%s'>" % (
self.returncode, self.stdout, self.stderr)
__str__ = __repr__
def execute(cmd, ok_exit_codes=None):
if ok_exit_codes is None:
ok_exit_codes = [0]
proc = subprocess.Popen(
cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
(stdout, stderr) = proc.communicate()
if proc.returncode not in ok_exit_codes:
raise ExecutionFailed(proc.returncode, stdout, stderr)
return proc.returncode, stdout, stderr
def usage():
print "usage: %s <SR PATH> <print|delete|move>" % sys.argv[0]
sys.exit(1)
def main():
if len(sys.argv) < 3:
usage()
sr_path = sys.argv[1]
action = sys.argv[2]
if action not in ('print', 'delete', 'move'):
usage()
if action == 'move':
if len(sys.argv) < 4:
print "error: must specify where to move bad VHDs"
sys.exit(1)
bad_vhd_path = sys.argv[3]
if not os.path.exists(bad_vhd_path):
os.makedirs(bad_vhd_path)
bad_leaves = []
descendents = {}
for fname in glob.glob(os.path.join(sr_path, "*.vhd")):
(returncode, stdout, stderr) = execute(
['vhd-util', 'query', '-n', fname, '-p'], ok_exit_codes=[0, 22])
stdout = stdout.strip()
if stdout.endswith('.vhd'):
try:
descendents[stdout].append(fname)
except KeyError:
descendents[stdout] = [fname]
elif 'query failed' in stdout:
bad_leaves.append(fname)
def walk_vhds(root):
yield root
if root in descendents:
for child in descendents[root]:
for vhd in walk_vhds(child):
yield vhd
for bad_leaf in bad_leaves:
for bad_vhd in walk_vhds(bad_leaf):
print bad_vhd
if action == "print":
pass
elif action == "delete":
os.unlink(bad_vhd)
elif action == "move":
new_path = os.path.join(bad_vhd_path,
os.path.basename(bad_vhd))
os.rename(bad_vhd, new_path)
else:
raise Exception("invalid action %s" % action)
if __name__ == '__main__':
main()
|
