k8s: upgrade api clients to networking/v1 API

- set k8s python client version to 20.x;
- rename "current_k8s_networking_v1beta" client to "current_k8s_networking_api_client", this will ensure that in future if networking API will have a different (e.g v2), variable name will not need a change.

addresses reanahub/reana#482

reana_commons/k8s/api_client.py

@@ -17,7 +17,7 @@
 
 # FIXME: monkeypatch to avoid `Invalid value for `names`, must not be `None``
 # error when calling `current_k8s_corev1_api_client.list_node()`.
-# After new Kubernetes release this should not be needed.
+# After new Kubernetes release (1.22+) this should not be needed.
 # https://github.com/reanahub/reana-commons/issues/197
 # https://github.com/kubernetes-client/python/issues/895
 # https://github.com/kubernetes/kubernetes/pull/102159
@@ -32,7 +32,7 @@ def names(self, names):
 V1ContainerImage.names = V1ContainerImage.names.setter(names)
 
 
-def create_api_client(api="BatchV1"):
+def create_api_client(api: str = "BatchV1"):
     """Create Kubernetes API client using config.
 
     :param api: String which represents which Kubernetes API to spawn. By
@@ -42,27 +42,27 @@ def create_api_client(api="BatchV1"):
     k8s_config.load_incluster_config()
     api_configuration = client.Configuration()
     api_configuration.verify_ssl = False
-    if api == "extensions/v1beta1":
-        api_client = client.ExtensionsV1beta1Api()
-    elif api == "CoreV1":
+    if api == "CoreV1":
         api_client = client.CoreV1Api()
     elif api == "StorageV1":
         api_client = client.StorageV1Api()
     elif api == "AppsV1":
         api_client = client.AppsV1Api()
-    elif api == "networking.k8s.io/v1beta1":
-        api_client = client.NetworkingV1beta1Api()
+    elif api == "networking.k8s.io/v1":
+        api_client = client.NetworkingV1Api()
     elif api == "CustomObjectsApi":
         api_client = client.CustomObjectsApi()
-    else:
+    elif api == "BatchV1":
         api_client = client.BatchV1Api()
+    else:
+        raise Exception(f"Cannot create api_client of a given type: {api}")
     return api_client
 
 
 current_k8s_batchv1_api_client = LocalProxy(create_api_client)
 current_k8s_corev1_api_client = LocalProxy(partial(create_api_client, api="CoreV1"))
-current_k8s_networking_v1beta1 = LocalProxy(
-    partial(create_api_client, api="networking.k8s.io/v1beta1")
+current_k8s_networking_api_client = LocalProxy(
+    partial(create_api_client, api="networking.k8s.io/v1")
 )
 current_k8s_storagev1_api_client = LocalProxy(
     partial(create_api_client, api="StorageV1")

setup.py

@@ -32,7 +32,7 @@ def get_snakemake_pkg(extras=""):
 extras_require = {
     "docs": ["Sphinx>=1.4.4", "sphinx-rtd-theme>=0.1.9",],
     "tests": tests_require,
-    "kubernetes": ["kubernetes>=11.0.0,<12.0.0",],
+    "kubernetes": ["kubernetes>=20.0.0,<21.0.0",],
     "yadage": ["adage==0.10.1", "yadage==0.20.1", "yadage-schemas==0.10.6",],
     "snakemake": [get_snakemake_pkg()],
     "snakemake_reports": [get_snakemake_pkg("[reports]")],