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
72 def cmd_object_checksums(segments):
73 lowlevel = lbs.LowlevelDataStore(options.store)
74 store = lbs.ObjectStore(lowlevel)
76 for (o, data) in store.load_segment(s):
77 csum = lbs.ChecksumCreator().update(data).compute()
78 print "%s/%s:%d:%s" % (s, o, len(data), csum)
81 # Read a snapshot file
82 def cmd_read_snapshots(snapshots):
84 lowlevel = lbs.LowlevelDataStore(options.store)
85 store = lbs.ObjectStore(lowlevel)
87 d = lbs.parse_full(store.load_snapshot(s))
89 print d['Segments'].split()
92 # Verify snapshot integrity
93 def cmd_verify_snapshots(snapshots):
95 lowlevel = lbs.LowlevelDataStore(options.store)
96 store = lbs.ObjectStore(lowlevel)
98 print "#### Snapshot", s
99 d = lbs.parse_full(store.load_snapshot(s))
100 print "## Root:", d['Root']
101 metadata = lbs.iterate_metadata(store, d['Root'])
103 if m.fields['type'] != '-': continue
104 print "%s [%d bytes]" % (m.fields['name'], int(m.fields['size']))
105 verifier = lbs.ChecksumVerifier(m.fields['checksum'])
107 for block in m.data():
108 data = store.get(block)
109 verifier.update(data)
111 if int(m.fields['size']) != size:
112 raise ValueError("File size does not match!")
113 if not verifier.valid():
114 raise ValueError("Bad checksum found")
124 elif cmd == 'list-snapshots':
126 elif cmd == 'object-sums':
127 cmd_object_checksums(args)
128 elif cmd == 'read-snapshots':
129 cmd_read_snapshots(args)
130 elif cmd == 'list-snapshot-sizes':
131 cmd_list_snapshot_sizes()
132 elif cmd == 'verify-snapshots':
133 cmd_verify_snapshots(args)
135 print "Unknown command:", cmd