outposts: default to currently running namespace if possible

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

authentik/outposts/controllers/k8s/base.py

@@ -48,10 +48,13 @@ class KubernetesObjectReconciler(Generic[T]):
     @property
     def name(self) -> str:
         """Get the name of the object this reconciler manages"""
-        return (self.controller.outpost.config.object_naming_template % {
-            "name": slugify(self.controller.outpost.name),
-            "uuid": self.controller.outpost.uuid.hex,
-        }).lower()
+        return (
+            self.controller.outpost.config.object_naming_template
+            % {
+                "name": slugify(self.controller.outpost.name),
+                "uuid": self.controller.outpost.uuid.hex,
+            }
+        ).lower()
 
     def up(self):
         """Create object if it doesn't exist, update if needed or recreate if needed."""

authentik/outposts/controllers/k8s/utils.py

@@ -0,0 +1,11 @@
+"""k8s utils"""
+from pathlib import Path
+
+
+def get_namespace() -> str:
+    """Get the namespace if we're running in a pod, otherwise default to default"""
+    path = Path("/var/run/secrets/kubernetes.io/serviceaccount/namespace")
+    if path.exists():
+        with open(path, "r") as _namespace_file:
+            return _namespace_file.read()
+    return "default"

authentik/outposts/models.py

@@ -33,6 +33,7 @@ from authentik.lib.config import CONFIG
 from authentik.lib.models import InheritanceForeignKey
 from authentik.lib.sentry import SentryIgnoredException
 from authentik.lib.utils.http import USER_ATTRIBUTE_CAN_OVERRIDE_IP
+from authentik.outposts.controllers.k8s.utils import get_namespace
 from authentik.outposts.docker_tls import DockerInlineTLS
 
 OUR_VERSION = parse(__version__)
@@ -59,7 +60,7 @@ class OutpostConfig:
 
     object_naming_template: str = field(default="ak-outpost-%(name)s")
     kubernetes_replicas: int = field(default=1)
-    kubernetes_namespace: str = field(default="default")
+    kubernetes_namespace: str = field(default_factory=get_namespace)
     kubernetes_ingress_annotations: dict[str, str] = field(default_factory=dict)
     kubernetes_ingress_secret_name: str = field(default="authentik-outpost-tls")
     kubernetes_service_type: str = field(default="ClusterIP")