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authentik/passbook/outposts/controllers/docker.py

134 lines
5.1 KiB
Python

"""Docker controller"""
from typing import Dict, Tuple
from docker import DockerClient, from_env
from docker.errors import DockerException, NotFound
from docker.models.containers import Container
from yaml import safe_dump
from passbook import __version__
from passbook.outposts.controllers.base import BaseController, ControllerException
from passbook.outposts.models import Outpost
class DockerController(BaseController):
"""Docker controller"""
client: DockerClient
container: Container
image_base = "beryju/passbook"
def __init__(self, outpost: Outpost) -> None:
super().__init__(outpost)
self.client = from_env()
def _get_env(self) -> Dict[str, str]:
return {
"PASSBOOK_HOST": self.outpost.config.passbook_host,
"PASSBOOK_INSECURE": str(self.outpost.config.passbook_host_insecure),
"PASSBOOK_TOKEN": self.outpost.token.token_uuid.hex,
}
def _comp_env(self, container: Container) -> bool:
"""Check if container's env is equal to what we would set. Return true if container needs
to be rebuilt."""
should_be = self._get_env()
container_env = container.attrs.get("Config", {}).get("Env", {})
for key, expected_value in should_be.items():
if key not in container_env:
continue
if container_env[key] != expected_value:
return True
return False
def _get_container(self) -> Tuple[Container, bool]:
container_name = f"passbook-proxy-{self.outpost.uuid.hex}"
try:
return self.client.containers.get(container_name), False
except NotFound:
self.logger.info("Container does not exist, creating")
image_name = f"{self.image_base}-{self.outpost.type}:{__version__}"
self.client.images.pull(image_name)
return (
self.client.containers.create(
image=image_name,
name=f"passbook-proxy-{self.outpost.uuid.hex}",
detach=True,
ports={x: x for _, x in self.deployment_ports.items()},
environment=self._get_env(),
),
True,
)
def up(self):
try:
container, has_been_created = self._get_container()
if has_been_created:
return None
# Check if the container is out of date, delete it and retry
if len(container.image.tags) > 0:
tag: str = container.image.tags[0]
_, _, version = tag.partition(":")
if version != __version__:
self.logger.info(
"Container has mismatched version, re-creating...",
has=version,
should=__version__,
)
container.kill()
container.remove(force=True)
return self.up()
# Check that container values match our values
if self._comp_env(container):
self.logger.info("Container has outdated config, re-creating...")
container.kill()
container.remove(force=True)
return self.up()
# Check that container is healthy
if (
container.status == "running"
and container.attrs.get("State", {}).get("Health", {}).get("Status", "")
!= "healthy"
):
# At this point we know the config is correct, but the container isn't healthy,
# so we just restart it with the same config
self.logger.info("Container is unhealthy, restarting...")
container.restart()
# Check that container is running
if container.status != "running":
self.logger.info("Container is not running, restarting...")
container.start()
return None
except DockerException as exc:
raise ControllerException from exc
def down(self):
try:
container, _ = self._get_container()
container.kill()
except DockerException as exc:
raise ControllerException from exc
def get_static_deployment(self) -> str:
"""Generate docker-compose yaml for proxy, version 3.5"""
ports = [f"{x}:{x}" for _, x in self.deployment_ports.items()]
compose = {
"version": "3.5",
"services": {
f"passbook_{self.outpost.type}": {
"image": f"{self.image_base}-{self.outpost.type}:{__version__}",
"ports": ports,
"environment": {
"PASSBOOK_HOST": self.outpost.config.passbook_host,
"PASSBOOK_INSECURE": str(
self.outpost.config.passbook_host_insecure
),
"PASSBOOK_TOKEN": self.outpost.token.token_uuid.hex,
},
}
},
}
return safe_dump(compose, default_flow_style=False)