docker-tidy/docker_custodian/docker_autostop.py

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2015-06-30 22:33:43 +00:00
#!/usr/bin/env python
"""
Stop docker container that have been running longer than the max_run_time and
match some prefix.
"""
import argparse
import logging
import sys
import dateutil.parser
import docker
import docker.errors
import requests.exceptions
from docker_custodian.args import timedelta_type
from docker.utils import kwargs_from_env
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log = logging.getLogger(__name__)
def stop_containers(client, max_run_time, matcher, dry_run):
for container_summary in client.containers():
container = client.inspect_container(container_summary['Id'])
name = container['Name'].lstrip('/')
if (
matcher(name) and
has_been_running_since(container, max_run_time)
):
log.info("Stopping container %s %s: running since %s" % (
container['Id'][:16],
name,
container['State']['StartedAt']))
if not dry_run:
stop_container(client, container['Id'])
def stop_container(client, id):
try:
client.stop(id)
except requests.exceptions.Timeout as e:
log.warn("Failed to stop container %s: %s" % (id, e))
except docker.errors.APIError as ae:
log.warn("Error stopping %s: %s" % (id, ae))
def build_container_matcher(prefixes):
def matcher(name):
return any(name.startswith(prefix) for prefix in prefixes)
return matcher
def has_been_running_since(container, min_time):
started_at = container.get('State', {}).get('StartedAt')
if not started_at:
return False
return dateutil.parser.parse(started_at) <= min_time
def main():
logging.basicConfig(
level=logging.INFO,
format="%(message)s",
stream=sys.stdout)
opts = get_opts()
client = docker.APIClient(version='auto',
timeout=opts.timeout,
**kwargs_from_env())
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matcher = build_container_matcher(opts.prefix)
stop_containers(client, opts.max_run_time, matcher, opts.dry_run)
def get_opts(args=None):
parser = argparse.ArgumentParser()
parser.add_argument(
'--max-run-time',
type=timedelta_type,
help="Maximum time a container is allows to run. Time may "
"be specified in any pytimeparse supported format."
)
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parser.add_argument(
'--prefix', action="append", default=[],
help="Only stop containers which match one of the "
"prefix."
)
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parser.add_argument(
'--dry-run', action="store_true",
help="Only log actions, don't stop anything."
)
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parser.add_argument(
'-t', '--timeout', type=int, default=60,
help="HTTP timeout in seconds for making docker API calls."
)
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opts = parser.parse_args(args=args)
if not opts.prefix:
parser.error("Running with no --prefix will match nothing.")
return opts
if __name__ == "__main__":
main()