refactor: option k8s delete propagation policy

Signed-off-by: thxCode <[email protected]>

Author: thxCode

gpustack_runtime/deployer/kuberentes.py

@@ -1611,7 +1611,7 @@ def _delete(
             core_api.delete_collection_namespaced_pod(
                 namespace=namespace,
                 label_selector=f"{_LABEL_WORKLOAD}={name}",
-                propagation_policy="Foreground",
+                propagation_policy=envs.GPUSTACK_RUNTIME_KUBERNETES_DELETE_PROPAGATION_POLICY,
             )
         except kubernetes.client.exceptions.ApiException as e:
             msg = f"Failed to delete pod of workload {name}{_detail_api_call_error(e)}"
@@ -1622,7 +1622,7 @@ def _delete(
             core_api.delete_collection_namespaced_service(
                 namespace=namespace,
                 label_selector=f"{_LABEL_WORKLOAD}={name}",
-                propagation_policy="Foreground",
+                propagation_policy=envs.GPUSTACK_RUNTIME_KUBERNETES_DELETE_PROPAGATION_POLICY,
             )
         except kubernetes.client.exceptions.ApiException as e:
             msg = f"Failed to delete service of workload {name}{_detail_api_call_error(e)}"
@@ -1633,7 +1633,7 @@ def _delete(
             core_api.delete_collection_namespaced_config_map(
                 namespace=namespace,
                 label_selector=f"{_LABEL_WORKLOAD}={name}",
-                propagation_policy="Foreground",
+                propagation_policy=envs.GPUSTACK_RUNTIME_KUBERNETES_DELETE_PROPAGATION_POLICY,
             )
         except kubernetes.client.exceptions.ApiException as e:
             msg = f"Failed to delete configmap of workload {name}{_detail_api_call_error(e)}"

gpustack_runtime/envs.py

@@ -243,6 +243,10 @@
     """
     Whether to use quorum read for Kubernetes services.
     """
+    GPUSTACK_RUNTIME_KUBERNETES_DELETE_PROPAGATION_POLICY: str | None = None
+    """
+    Deletion propagation policy for Kubernetes resources (e.g., Foreground, Background, Orphan).
+    """
 
 # --8<-- [start:env-vars-definition]
 
@@ -459,6 +463,14 @@
     "GPUSTACK_RUNTIME_KUBERNETES_QUORUM_READ": lambda: to_bool(
         getenv("GPUSTACK_RUNTIME_KUBERNETES_QUORUM_READ", "0"),
     ),
+    "GPUSTACK_RUNTIME_KUBERNETES_DELETE_PROPAGATION_POLICY": lambda: choice(
+        getenv(
+            "GPUSTACK_RUNTIME_KUBERNETES_DELETE_PROPAGATION_POLICY",
+            "Foreground",
+        ),
+        options=["Foreground", "Background", "Orphan"],
+        default="Background",
+    ),
 }