~juju-qa/juju-ci-tools/trunk

#!/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())