mirror of
https://github.com/thegeeklab/docker-tidy.git
synced 2024-11-22 04:00:40 +00:00
324 lines
11 KiB
Python
324 lines
11 KiB
Python
#!/usr/bin/env python3
|
|
"""Remove unused docker containers and images."""
|
|
|
|
import fnmatch
|
|
from collections import namedtuple
|
|
|
|
import dateutil.parser
|
|
import docker
|
|
import docker.errors
|
|
import requests.exceptions
|
|
|
|
from dockertidy.Config import SingleConfig
|
|
from dockertidy.Logger import SingleLog
|
|
from dockertidy.Parser import timedelta
|
|
|
|
|
|
class GarbageCollector:
|
|
"""Garbage collector object to handle cleanup tasks of container, images and volumes."""
|
|
|
|
# This seems to be something docker uses for a null/zero date
|
|
YEAR_ZERO = "0001-01-01T00:00:00Z"
|
|
ExcludeLabel = namedtuple("ExcludeLabel", ["key", "value"])
|
|
|
|
def __init__(self):
|
|
self.config = SingleConfig()
|
|
self.log = SingleLog()
|
|
self.logger = SingleLog().logger
|
|
self.docker = self._get_docker_client()
|
|
|
|
def cleanup_containers(self):
|
|
"""Identify old containers and remove them."""
|
|
config = self.config.config
|
|
client = self.docker
|
|
all_containers = self._get_all_containers()
|
|
|
|
filtered_containers = self._filter_excluded_containers(all_containers)
|
|
|
|
self.logger.info(
|
|
"Removing containers older than '{}'".format(
|
|
timedelta(config["gc"]["max_container_age"], dt_format="%Y-%m-%d, %H:%M:%S")
|
|
)
|
|
)
|
|
|
|
for container_summary in reversed(list(filtered_containers)):
|
|
container = self._api_call(
|
|
client.inspect_container,
|
|
container=container_summary["Id"],
|
|
)
|
|
if not container or not self._should_remove_container(
|
|
container,
|
|
timedelta(config["gc"]["max_container_age"]),
|
|
):
|
|
continue
|
|
|
|
self.logger.info(
|
|
"Removing container {} {} {}".format(
|
|
container["Id"][:16],
|
|
container.get("Name", "").lstrip("/"), container["State"]["FinishedAt"]
|
|
)
|
|
)
|
|
|
|
if not config["dry_run"]:
|
|
self._api_call(
|
|
client.remove_container,
|
|
container=container["Id"],
|
|
v=True,
|
|
)
|
|
|
|
def _filter_excluded_containers(self, containers):
|
|
config = self.config.config
|
|
|
|
if not config["gc"]["exclude_container_labels"]:
|
|
return containers
|
|
|
|
def include_container(container):
|
|
if self._should_exclude_container_with_labels(container):
|
|
return False
|
|
return True
|
|
|
|
return filter(include_container, containers)
|
|
|
|
def _should_exclude_container_with_labels(self, container):
|
|
config = self.config.config
|
|
|
|
if container["Labels"]:
|
|
for exclude_label in config["gc"]["exclude_container_labels"]:
|
|
if exclude_label.value:
|
|
matching_keys = fnmatch.filter(
|
|
container["Labels"].keys(),
|
|
exclude_label.key,
|
|
)
|
|
label_values_to_check = [
|
|
container["Labels"][matching_key] for matching_key in matching_keys
|
|
]
|
|
if fnmatch.filter(label_values_to_check, exclude_label.value):
|
|
return True
|
|
else:
|
|
if fnmatch.filter(container["Labels"].keys(), exclude_label.key):
|
|
return True
|
|
return False
|
|
|
|
def _should_remove_container(self, container, min_date):
|
|
state = container.get("State", {})
|
|
|
|
if state.get("Running"):
|
|
return False
|
|
|
|
if state.get("Ghost"):
|
|
return True
|
|
|
|
# Container was created, but never started
|
|
if state.get("FinishedAt") == self.YEAR_ZERO:
|
|
created_date = dateutil.parser.parse(container["Created"])
|
|
return created_date < min_date
|
|
|
|
finished_date = dateutil.parser.parse(state["FinishedAt"])
|
|
return finished_date < min_date
|
|
|
|
def _get_all_containers(self):
|
|
client = self.docker
|
|
self.logger.info("Getting all containers")
|
|
containers = client.containers(all=True)
|
|
self.logger.info("Found %s containers", len(containers))
|
|
return containers
|
|
|
|
def _get_all_images(self):
|
|
client = self.docker
|
|
self.logger.info("Getting all images")
|
|
images = client.images()
|
|
self.logger.info("Found %s images", len(images))
|
|
return images
|
|
|
|
def _get_dangling_volumes(self):
|
|
client = self.docker
|
|
self.logger.info("Getting dangling volumes")
|
|
volumes = client.volumes({"dangling": True})["Volumes"] or []
|
|
self.logger.info("Found %s dangling volumes", len(volumes))
|
|
return volumes
|
|
|
|
def cleanup_images(self, exclude_set):
|
|
"""Identify old images and remove them."""
|
|
# re-fetch container list so that we don't include removed containers
|
|
client = self.docker
|
|
config = self.config.config
|
|
|
|
containers = self._get_all_containers()
|
|
images = self._get_all_images()
|
|
if docker.utils.compare_version("1.21", client._version) < 0:
|
|
image_tags_in_use = {container["Image"] for container in containers}
|
|
images = self._filter_images_in_use(images, image_tags_in_use)
|
|
else:
|
|
# ImageID field was added in 1.21
|
|
image_ids_in_use = {container["ImageID"] for container in containers}
|
|
images = self._filter_images_in_use_by_id(images, image_ids_in_use)
|
|
images = self._filter_excluded_images(images, exclude_set)
|
|
|
|
self.logger.info(
|
|
"Removing images older than '{}'".format(
|
|
timedelta(config["gc"]["max_image_age"], dt_format="%Y-%m-%d, %H:%M:%S")
|
|
)
|
|
)
|
|
for image_summary in reversed(list(images)):
|
|
self._remove_image(image_summary, timedelta(config["gc"]["max_image_age"]))
|
|
|
|
def _filter_excluded_images(self, images, exclude_set):
|
|
|
|
def include_image(image_summary):
|
|
image_tags = image_summary.get("RepoTags")
|
|
if self._no_image_tags(image_tags):
|
|
return True
|
|
for exclude_pattern in exclude_set:
|
|
if fnmatch.filter(image_tags, exclude_pattern):
|
|
return False
|
|
return True
|
|
|
|
return filter(include_image, images)
|
|
|
|
def _filter_images_in_use(self, images, image_tags_in_use):
|
|
|
|
def get_tag_set(image_summary):
|
|
image_tags = image_summary.get("RepoTags")
|
|
if self._no_image_tags(image_tags):
|
|
# The repr of the image Id used by client.containers()
|
|
return set(["%s:latest" % image_summary["Id"][:12]])
|
|
return set(image_tags)
|
|
|
|
def image_not_in_use(image_summary):
|
|
return not get_tag_set(image_summary) & image_tags_in_use
|
|
|
|
return filter(image_not_in_use, images)
|
|
|
|
def _filter_images_in_use_by_id(self, images, image_ids_in_use):
|
|
|
|
def image_not_in_use(image_summary):
|
|
return image_summary["Id"] not in image_ids_in_use
|
|
|
|
return filter(image_not_in_use, images)
|
|
|
|
def _is_image_old(self, image, min_date):
|
|
return dateutil.parser.parse(image["Created"]) < min_date
|
|
|
|
def _no_image_tags(self, image_tags):
|
|
return not image_tags or image_tags == ["<none>:<none>"]
|
|
|
|
def _remove_image(self, image_summary, min_date):
|
|
config = self.config.config
|
|
client = self.docker
|
|
image = self._api_call(client.inspect_image, image=image_summary["Id"])
|
|
|
|
if not image or not self._is_image_old(image, min_date):
|
|
return
|
|
|
|
self.logger.info("Removing image %s" % self._format_image(image, image_summary))
|
|
if config["dry_run"]:
|
|
return
|
|
|
|
image_tags = image_summary.get("RepoTags")
|
|
# If there are no tags, remove the id
|
|
if self._no_image_tags(image_tags):
|
|
self._api_call(client.remove_image, image=image_summary["Id"])
|
|
return
|
|
|
|
# Remove any repository tags so we don't hit 409 Conflict
|
|
for image_tag in image_tags:
|
|
self._api_call(client.remove_image, image=image_tag)
|
|
|
|
def _remove_volume(self, volume):
|
|
config = self.config.config
|
|
client = self.docker
|
|
if not volume:
|
|
return
|
|
|
|
self.logger.info("Removing volume %s" % volume["Name"])
|
|
if config["dry_run"]:
|
|
return
|
|
|
|
self._api_call(client.remove_volume, name=volume["Name"])
|
|
|
|
def cleanup_volumes(self):
|
|
"""Identify old volumes and remove them."""
|
|
dangling_volumes = self._get_dangling_volumes()
|
|
|
|
self.logger.info("Removing dangling volumes")
|
|
for volume in reversed(dangling_volumes):
|
|
self.logger.info("Removing dangling volume %s", volume["Name"])
|
|
self._remove_volume(volume)
|
|
|
|
def _api_call(self, func, **kwargs):
|
|
try:
|
|
return func(**kwargs)
|
|
except requests.exceptions.Timeout as e:
|
|
params = ",".join("%s=%s" % item for item in kwargs.items())
|
|
self.logger.warn("Failed to call %s %s %s" % (func.__name__, params, e))
|
|
except docker.errors.APIError as ae:
|
|
params = ",".join("%s=%s" % item for item in kwargs.items())
|
|
self.logger.warn("Error calling %s %s %s" % (func.__name__, params, ae))
|
|
|
|
def _format_image(self, image, image_summary):
|
|
|
|
def get_tags():
|
|
tags = image_summary.get("RepoTags")
|
|
if not tags or tags == ["<none>:<none>"]:
|
|
return ""
|
|
return ", ".join(tags)
|
|
|
|
return "%s %s" % (image["Id"][:16], get_tags())
|
|
|
|
def _build_exclude_set(self):
|
|
config = self.config.config
|
|
exclude_set = set(config["gc"]["exclude_images"])
|
|
|
|
def is_image_tag(line):
|
|
return line and not line.startswith("#")
|
|
|
|
return exclude_set
|
|
|
|
def _format_exclude_labels(self):
|
|
config = self.config.config
|
|
exclude_labels = []
|
|
|
|
for exclude_label_arg in config["gc"]["exclude_container_labels"]:
|
|
split_exclude_label = exclude_label_arg.split("=", 1)
|
|
exclude_label_key = split_exclude_label[0]
|
|
if len(split_exclude_label) == 2:
|
|
exclude_label_value = split_exclude_label[1]
|
|
else:
|
|
exclude_label_value = None
|
|
exclude_labels.append(
|
|
self.ExcludeLabel(
|
|
key=exclude_label_key,
|
|
value=exclude_label_value,
|
|
)
|
|
)
|
|
config["gc"]["exclude_container_labels"] = exclude_labels
|
|
|
|
def _get_docker_client(self):
|
|
config = self.config.config
|
|
try:
|
|
return docker.APIClient(version="auto", timeout=config["http_timeout"])
|
|
except docker.errors.DockerException as e:
|
|
self.log.sysexit_with_message("Can't create docker client\n{}".format(e))
|
|
|
|
def run(self):
|
|
"""Garbage collector main method."""
|
|
self.logger.info("Start garbage collection")
|
|
config = self.config.config
|
|
self._format_exclude_labels()
|
|
|
|
if config["gc"]["max_container_age"]:
|
|
self.cleanup_containers()
|
|
|
|
if config["gc"]["max_image_age"]:
|
|
exclude_set = self._build_exclude_set()
|
|
self.cleanup_images(exclude_set)
|
|
|
|
if config["gc"]["dangling_volumes"]:
|
|
self.cleanup_volumes()
|
|
|
|
if (
|
|
not config["gc"]["max_container_age"] and not config["gc"]["max_image_age"]
|
|
and not config["gc"]["dangling_volumes"]
|
|
):
|
|
self.logger.warn("Skipped, no arguments given")
|