3 # Utility for managing LBS archives.
5 import getpass, os, sys
6 from optparse import OptionParser
9 parser = OptionParser(usage="%prog [option]... command [arg]...")
10 parser.add_option("-v", action="store_true", dest="verbose", default=False,
11 help="increase verbosity")
12 parser.add_option("--store", dest="store",
13 help="specify path to backup data store")
14 parser.add_option("--localdb", dest="localdb",
15 help="specify path to local database")
16 (options, args) = parser.parse_args(sys.argv[1:])
18 # Read a passphrase from the user and store it in the LBS_GPG_PASSPHRASE
19 # environment variable.
21 ENV_KEY = 'LBS_GPG_PASSPHRASE'
22 if not os.environ.has_key(ENV_KEY):
23 os.environ[ENV_KEY] = getpass.getpass()
25 # Run the segment cleaner.
26 # Syntax: $0 --localdb=LOCALDB clean
27 def cmd_clean(clean_threshold=7.0):
28 db = lbs.LocalDatabase(options.localdb)
30 # Delete old snapshots from the local database.
33 # Expire segments which are poorly-utilized.
34 for s in db.get_segment_cleaning_list():
35 if s.cleaning_benefit > clean_threshold:
36 print "Cleaning segment %d (benefit %.2f)" % (s.id,
38 db.mark_segment_expired(s)
41 db.balance_expired_objects()
44 # List snapshots stored.
45 # Syntax: $0 --data=DATADIR list-snapshots
46 def cmd_list_snapshots():
47 store = lbs.LowlevelDataStore(options.store)
48 for s in sorted(store.list_snapshots()):
51 # List size of data needed for each snapshot.
52 # Syntax: $0 --data=DATADIR list-snapshot-sizes
53 def cmd_list_snapshot_sizes():
54 lowlevel = lbs.LowlevelDataStore(options.store)
55 store = lbs.ObjectStore(lowlevel)
57 for s in sorted(lowlevel.list_snapshots()):
58 d = lbs.parse_full(store.load_snapshot(s))
59 segments = d['Segments'].split()
60 (size, added, removed) = (0, 0, 0)
62 segsize = lowlevel.lowlevel_stat(seg + ".tar.gpg")['size']
64 if seg not in previous: added += segsize
66 if seg not in segments:
67 removed += lowlevel.lowlevel_stat(seg + ".tar.gpg")['size']
68 previous = set(segments)
69 print "%s: %.3f +%.3f -%.3f" % (s, size / 1024.0**2, added / 1024.0**2, removed / 1024.0**2)
71 # Build checksum list for objects in the given segments, or all segments if
73 def cmd_object_checksums(segments):
75 lowlevel = lbs.LowlevelDataStore(options.store)
76 store = lbs.ObjectStore(lowlevel)
77 if len(segments) == 0:
78 segments = sorted(lowlevel.list_segments())
80 for (o, data) in store.load_segment(s):
81 csum = lbs.ChecksumCreator().update(data).compute()
82 print "%s/%s:%d:%s" % (s, o, len(data), csum)
85 # Read a snapshot file
86 def cmd_read_snapshots(snapshots):
88 lowlevel = lbs.LowlevelDataStore(options.store)
89 store = lbs.ObjectStore(lowlevel)
91 d = lbs.parse_full(store.load_snapshot(s))
93 print d['Segments'].split()
96 # Verify snapshot integrity
97 def cmd_verify_snapshots(snapshots):
99 lowlevel = lbs.LowlevelDataStore(options.store)
100 store = lbs.ObjectStore(lowlevel)
102 print "#### Snapshot", s
103 d = lbs.parse_full(store.load_snapshot(s))
104 print "## Root:", d['Root']
105 metadata = lbs.iterate_metadata(store, d['Root'])
107 if m.fields['type'] != '-': continue
108 print "%s [%d bytes]" % (m.fields['name'], int(m.fields['size']))
109 verifier = lbs.ChecksumVerifier(m.fields['checksum'])
111 for block in m.data():
112 data = store.get(block)
113 verifier.update(data)
115 if int(m.fields['size']) != size:
116 raise ValueError("File size does not match!")
117 if not verifier.valid():
118 raise ValueError("Bad checksum found")
128 elif cmd == 'list-snapshots':
130 elif cmd == 'object-sums':
131 cmd_object_checksums(args)
132 elif cmd == 'read-snapshots':
133 cmd_read_snapshots(args)
134 elif cmd == 'list-snapshot-sizes':
135 cmd_list_snapshot_sizes()
136 elif cmd == 'verify-snapshots':
137 cmd_verify_snapshots(args)
139 print "Unknown command:", cmd