[DH-306] nfs and load balancer fixes

deployments/ugr01/config/common.yaml

@@ -1,7 +1,7 @@
 nfsPVC:
   enabled: true
   nfs:
-    serverIP: 10.49.181.18
+    serverIP: 10.185.238.42
 
 jupyterhub:
   scheduling:

deployments/ugr01/config/prod.yaml

@@ -3,16 +3,29 @@ nfsPVC:
     shareName: shares/ugr01/prod
 
 jupyterhub:
-  ingress:
-    enabled: true
-    hosts:
-      - ugr01.datahub.berkeley.edu
-    tls:
-      - secretName: tls-cert
-        hosts:
-          - ugr01.datahub.berkeley.edu
   hub:
     db:
       pvc:
         # This also holds logs
         storage: 4Gi
+  prePuller:
+    continuous:
+      enabled: false
+  proxy:
+    service:
+      loadBalancerIP: 34.71.179.119
+    traefik:
+      extraInitContainers:
+        # This startup delay can help the k8s container network interface setup
+        # network routing of traffic to the pod, which is essential for the ACME
+        # challenge submitted by Traefik on startup to acquire a TLS certificate.
+        #
+        # Sleeping for 7 seconds has been consistently sufficient to avoid issues
+        # in GKE when this workaround was explored initially for GKE.
+        #
+        - name: startup-delay
+          image: busybox:stable
+          command: ["sh", "-c", "sleep 10"]
+    https:
+      hosts:
+        - ugr01.datahub.berkeley.edu