outposts: add build_hash for docker image

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

authentik/lib/default.yml

@@ -42,6 +42,7 @@ outposts:
   # Placeholders:
   # %(type)s: Outpost type; proxy, ldap, etc
   # %(version)s: Current version; 2021.4.1
+  # %(build_hash)s: Build hash if you're running a beta version
   docker_image_base: "beryju/authentik-%(type)s:%(version)s"
 
 authentik:

authentik/outposts/controllers/base.py

@@ -1,11 +1,12 @@
 """Base Controller"""
 from dataclasses import dataclass
+from os import environ
 from typing import Optional
 
 from structlog.stdlib import get_logger
 from structlog.testing import capture_logs
 
-from authentik import __version__
+from authentik import ENV_GIT_HASH_KEY, __version__
 from authentik.lib.config import CONFIG
 from authentik.lib.sentry import SentryIgnoredException
 from authentik.outposts.models import Outpost, OutpostServiceConnection
@@ -69,4 +70,8 @@ class BaseController:
     def get_container_image(self) -> str:
         """Get container image to use for this outpost"""
         image_name_template: str = CONFIG.y("outposts.docker_image_base")
-        return image_name_template % {"type": self.outpost.type, "version": __version__}
+        return image_name_template % {
+            "type": self.outpost.type,
+            "version": __version__,
+            "build_hash": environ.get(ENV_GIT_HASH_KEY, ""),
+        }