Add hostnmae to chart

jupyter/base/charts/jupyterhub/templates/hub/deployment.yaml

@@ -33,6 +33,10 @@ spec:
         {{- . | toYaml | nindent 8 }}
         {{- end }}
     spec:
+      hostAliases:
+        - ip: "127.0.0.1"
+          hostnames:
+            - "hub"
       {{- if .Values.scheduling.podPriority.enabled }}
       priorityClassName: {{ include "jupyterhub.priority.fullname" . }}
       {{- end }}

jupyter/base/values/values.yaml

@@ -155,11 +155,6 @@ hub:
       c.JupyterHub.api_tokens = {
           os.environ['JUPYTERHUB_API_KEY']: "refresh-token",
       }
-      c.JupyterHub.extra_host_config.update({
-        "extra_hosts": {
-          "hub":"127.0.0.1"
-        }
-      })
   extraFiles:
     refresh-token.py: 
       mountPath: /usr/local/etc/jupyterhub/refresh-token.py