feat(k8s): set custom ingressClassName for interactive sessions (#581)

Closes reanahub/reana#742

Author: mdonadoni

reana_workflow_controller/config.py

@@ -197,6 +197,9 @@ def _env_vars_dict_to_k8s_list(env_vars):
 REANA_INGRESS_ANNOTATIONS = json.loads(os.getenv("REANA_INGRESS_ANNOTATIONS", "{}"))
 """REANA Ingress annotations defined by the administrator."""
 
+REANA_INGRESS_CLASS_NAME = os.getenv("REANA_INGRESS_CLASS_NAME")
+"""REANA Ingress class name defined by the administrator to be used for interactive sessions."""
+
 IMAGE_PULL_SECRETS = os.getenv("IMAGE_PULL_SECRETS", "").split(",")
 """Docker image pull secrets which allow the usage of private images."""
 

reana_workflow_controller/k8s.py

@@ -1,5 +1,5 @@
 # This file is part of REANA.
-# Copyright (C) 2019, 2020, 2021, 2022 CERN.
+# Copyright (C) 2019, 2020, 2021, 2022, 2024 CERN.
 #
 # REANA is free software; you can redistribute it and/or modify it
 # under the terms of the MIT License; see LICENSE file for more details.
@@ -26,6 +26,7 @@
     JUPYTER_INTERACTIVE_SESSION_DEFAULT_IMAGE,
     JUPYTER_INTERACTIVE_SESSION_DEFAULT_PORT,
     REANA_INGRESS_ANNOTATIONS,
+    REANA_INGRESS_CLASS_NAME,
 )
 
 
@@ -105,6 +106,8 @@ def _build_ingress(self):
         spec = client.V1IngressSpec(
             rules=[client.V1IngressRule(http=ingress_rule_value)]
         )
+        if REANA_INGRESS_CLASS_NAME:
+            spec.ingress_class_name = REANA_INGRESS_CLASS_NAME
         ingress = client.V1Ingress(
             api_version="networking.k8s.io/v1",
             kind="Ingress",