Try to fix issue with health check but this libsonnet file is corrupt.

kubeflow/core/jupyterhub.libsonnet

@@ -119,8 +119,36 @@ http {
       return 200;
       access_log off;
     }
+    # location / {
+    #  root /dev/null;
+    # }
+
+    # Return an ok suitable for health checking.
+    # This is a hack to deal with the fact that the path picked up the ingress depends
+    # on the readiness probe of the pod but if the pod doesn't exist it might default to /
     location / {
-      root /dev/null;
+      return 200;
+      access_log off;
+    }
+  }
+
+  # See https://github.com/kubernetes/contrib/blob/master/ingress/controllers/gce/examples/health_checks/README.md#limitations
+  # The readiness probe determines the health check. But the health check needs to be on the same port
+  # as the ingress which is 80
+  server {
+    listen 80;
+
+    location /healthz {
+      return 200;
+      access_log off;
+    }    
+
+    # Return an ok suitable for health checking.
+    # This is a hack to deal with the fact that the path picked up the ingress depends
+    # on the readiness probe of the pod but if the pod doesn't exist it might default to
+    location / {
+      return 200;
+      access_log off;
     }
   }
 }
@@ -367,7 +395,11 @@ c.KubeSpawner.pvc_name_template = 'claim-{username}{servername}'
           {
           	// This is the port on which it accepts connections
             "containerPort": 9000
-          }
+          },
+          {
+          	// This is the port for health check which must match ingress
+            "containerPort": 80,
+          },
         ], 
         "volumeMounts": [
 	              {
@@ -378,7 +410,7 @@ c.KubeSpawner.pvc_name_template = 'claim-{username}{servername}'
         "readinessProbe": {
           "httpGet": {
             "path": "/healthz", 
-            "port": 9000
+            "port": 80
           }
         }
 	 }, // iapSideCar 
@@ -419,16 +451,16 @@ c.KubeSpawner.pvc_name_template = 'claim-{username}{servername}'
 	            ],
 	            // Don't try listing specific ports.
 	            // DO NOT submit
-	            //"ports": [
-	            //  // Port 8000 is used by the hub to accept incoming requests.
-		        //  {
-		        //    "containerPort": 8000,
-		        //  },
-		        //  // Port 8081 accepts callbacks from the individual Jupyter pods.
-		        //  {
-		         //   "containerPort": 8081,
-		        /// },
-		        //], 
+	            "ports": [
+	             // Port 8000 is used by the hub to accept incoming requests.
+		          {
+		            "containerPort": 8000,
+		          },
+		          // Port 8081 accepts callbacks from the individual Jupyter pods.
+		          {
+		            "containerPort": 8081,
+		         },
+		        ], 
 	          }
 	        ] + sideCars, 
 	        "serviceAccountName": "jupyter-hub",