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#!/usr/bin/env python
from __future__ import print_function
from argparse import ArgumentParser
from datetime import (
datetime,
timedelta,
)
import json
import os
import subprocess
import sys
from dateutil import (
parser as date_parser,
tz,
)
def list_old_juju_containers(hours):
env = dict(os.environ)
containers = json.loads(subprocess.check_output([
'lxc', 'list', '--format', 'json'], env=env))
now = datetime.now(tz.gettz('UTC'))
for container in containers:
name = container['name']
if not name.startswith('juju-'):
continue
created_at = date_parser.parse(container['created_at'])
age = now - created_at
if age <= timedelta(hours=hours):
continue
yield name, age
def main():
parser = ArgumentParser('Delete old juju containers')
parser.add_argument('--dry-run', action='store_true',
help='Do not actually delete.')
parser.add_argument('--hours', type=int, default=1,
help='Number of hours a juju container may exist.')
args = parser.parse_args()
for container, age in list_old_juju_containers(args.hours):
print('deleting {} ({} old)'.format(container, age))
if args.dry_run:
continue
subprocess.check_call(('lxc', 'delete', '--verbose', '--force',
container))
if __name__ == '__main__':
sys.exit(main())
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