59 lines
1.6 KiB
Python
59 lines
1.6 KiB
Python
#!/usr/bin/env python3
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from datetime import datetime, timedelta
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from re import match
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from subprocess import check_output
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from sys import exit
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output = check_output(['zfs', 'get', 'creation', '-Hpr', '-t', 'snapshot'])
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now = int(datetime.now().timestamp())
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warn_age = now - (60 * 60 * 24 * 90)
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warn_snapshots = set()
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return_code = 0
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for line in output.decode('utf-8').split("\n"):
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if line.strip() == '':
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continue
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items = line.split("\t")
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# If the snapshot name contains 'zfs-auto-snap', it's probably
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# really an automated snapshot and will be cleaned up eventually.
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# This check only cares about manually created snapshots, though.
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if 'zfs-auto-snap' in items[0]:
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continue
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# SNAPSHOT_FOR_RESET is used by bundle automatic-reset-of-zfs-dataset
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# to reset datasets to a known good state (used for test systems).
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if 'SNAPSHOT_FOR_RESET' in items[0]:
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continue
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# These are docker-internal snapshots and should not be touched by
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# us.
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if match(r'^tank/docker/[a-z0-9]+(-init)?@[0-9]+', items[0]):
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continue
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# line should be '<snapshot> creation <timestamp> -', separated by
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# tabstops.
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if len(items) < 3:
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print('UNKNOWN - error while parsing ' + line)
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exit(3)
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creation_date = int(items[2])
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if creation_date < warn_age:
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warn_snapshots.add(items[0])
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for snap in sorted(warn_snapshots):
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print('WARN - {} is older than 90 days'.format(snap))
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if len(warn_snapshots) > 0:
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return_code = 1
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else:
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print('OK - no snapshots are older than 90 days')
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exit(return_code)
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