feat(client): fallback 'gefyra run' namespace from kubeconfig

.github/workflows/python-tester.yaml

@@ -113,6 +113,22 @@ jobs:
         test $? -eq 0
         curl localhost:8000
         test $? -eq 0
+    - name: Run gefyra run with no given namespace and no fallback (uses default)
+      working-directory: ./client
+      run: |
+        poetry run coverage run -a -m gefyra run -i pyserver -N mypyserver1
+        test $? -eq 0
+        test $(docker inspect mypyserver1 --format {{.HostConfig.DnsSearch}}) == [default.svc.cluster.local]
+        docker kill mypyserver1
+    - name: Run gefyra run with default namespace from kubeconfig (uses 'fancy')
+      working-directory: ./client
+      run: |
+        kubectl config set-context --current --namespace=fancy
+        poetry run coverage run -a -m gefyra run -i pyserver -N mypyserver2
+        test $? -eq 0
+        test $(docker inspect mypyserver2 --format {{.HostConfig.DnsSearch}}) == [fancy.svc.cluster.local]
+        kubectl config set-context --current --namespace=default
+        docker kill mypyserver2
     - name: Run gefyra bridge with invalid deployment
       working-directory: ./client
       shell: bash --noprofile --norc -o pipefail {0}

client/gefyra/__main__.py

@@ -80,7 +80,6 @@
     "-n",
     "--namespace",
     help="the namespace for this container to run in",
-    default="default",
 )
 run_parser.add_argument(
     "--env",

client/gefyra/api/run.py

@@ -68,7 +68,7 @@ def run(
     ports: dict = None,
     detach: bool = True,
     auto_remove: bool = True,
-    namespace: str = "default",
+    namespace: str = None,
     env: list = None,
     env_from: str = None,
     config=default_configuration,
@@ -80,6 +80,16 @@ def run(
     from gefyra.local.cargo import probe_wireguard_connection
     from docker.errors import APIError
 
+    # #125: Fallback to namespace in kube config
+    if namespace is None:
+        from kubernetes.config import kube_config
+
+        _, active_context = kube_config.list_kube_config_contexts()
+        namespace = active_context["context"].get("namespace") or "default"
+        ns_source = "kubeconfig"
+    else:
+        ns_source = "--namespace argument"
+
     dns_search = f"{namespace}.svc.cluster.local"
     config = set_gefyra_network_from_cargo(config)
     #
@@ -146,7 +156,7 @@ def run(
 
     logger.info(
         f"Container image '{', '.join(container.image.tags)}' started with name '{container.name}' in "
-        f"Kubernetes namespace '{namespace}'"
+        f"Kubernetes namespace '{namespace}' (from {ns_source})"
     )
     if detach:
         return True