Ray namespace added for k8s (#4111)

* Ray namespace added for k8s

* Submit.yaml update with k8s namespace

* K8s deployment doc update with namespace

doc/source/deploy-on-kubernetes.rst

@@ -27,14 +27,14 @@ To work interactively, first start Ray on Kubernetes.
   kubectl create -f ray/kubernetes/worker.yaml
 
 This will start one head pod and 3 worker pods. You can check that the pods are
-running by running ``kubectl get pods``.
+running by running ``kubectl get pods -n ray``.
 
 You should see something like the following (you will have to wait a couple
 minutes for the pods to enter the "Running" state).
 
 .. code-block:: shell
 
-  $ kubectl get pods
+  $ kubectl get pods -n ray
   NAME                          READY   STATUS    RESTARTS   AGE
   ray-head-5455bb66c9-6bxvz     1/1     Running   0          10s
   ray-worker-5c49b7cc57-c6xs8   1/1     Running   0          5s
@@ -45,7 +45,7 @@ To run tasks interactively on the cluster, connect to one of the pods, e.g.,
 
 .. code-block:: shell
 
-  kubectl exec -it ray-head-5455bb66c9-6bxvz -- bash
+  kubectl exec -it -n ray ray-head-5455bb66c9-6bxvz -- bash
 
 Start an IPython interpreter, e.g., ``ipython``
 
@@ -86,7 +86,7 @@ running ``kubectl get all``. You'll see output like the following.
 
 .. code-block:: shell
 
-  $ kubectl get all
+  $ kubectl get all -n ray
   NAME                              READY   STATUS    RESTARTS   AGE
   pod/ray-head-5486648dc9-c6hz2     1/1     Running   0          11s
   pod/ray-worker-5c49b7cc57-2jz4l   1/1     Running   0          11s
@@ -108,7 +108,7 @@ Find the name of the ``ray-head`` pod and run the equivalent of
 
 .. code-block:: shell
 
-  kubectl logs ray-head-5486648dc9-c6hz2
+  kubectl logs ray-head-5486648dc9-c6hz2 -n ray
 
 Cleaning Up
 -----------
@@ -117,9 +117,9 @@ To remove the services you have created, run the following.
 
 .. code-block:: shell
 
-  kubectl delete service/ray-head \
-                 deployment.apps/ray-head \
-                 deployment.apps/ray-worker
+  kubectl delete -n ray service/ray-head \
+                        deployment.apps/ray-head \
+                        deployment.apps/ray-worker
 
 
 Customization

kubernetes/head.yaml

@@ -1,7 +1,13 @@
 apiVersion: v1
+kind: Namespace
+metadata:
+  name: ray
+---
+apiVersion: v1
 kind: Service
 metadata:
   name: ray-head
+  namespace: ray
 spec:
   ports:
     - name: redis-primary
@@ -26,6 +32,7 @@ apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: ray-head
+  namespace: ray
 spec:
   replicas: 1
   selector:

kubernetes/submit.yaml

@@ -1,7 +1,13 @@
 apiVersion: v1
+kind: Namespace
+metadata:
+  name: ray
+---
+apiVersion: v1
 kind: Service
 metadata:
   name: ray-head
+  namespace: ray
 spec:
   ports:
     - name: redis-primary
@@ -26,6 +32,7 @@ apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: ray-head
+  namespace: ray
 spec:
   replicas: 1
   selector:
@@ -72,6 +79,7 @@ apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: ray-worker
+  namespace: ray
 spec:
   replicas: 3
   selector:

kubernetes/worker.yaml

@@ -2,6 +2,7 @@ apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: ray-worker
+  namespace: ray
 spec:
   replicas: 3
   selector: