Remove namespace from k8s example (#275)

* remove namespace from k8s example

* add remove step

README.md

@@ -32,24 +32,19 @@ docker stack deploy --compose-file docker-stack.yml vote
 
 The folder k8s-specifications contains the YAML specifications of the Voting App's services.
 
-Run the following command to create the deployments and services objects in the vote namespace:
+Run the following command to create the deployments and services. Note it will create these resources in your current namespace (`default` if you haven't changed it.)
 
 ```shell
 kubectl create -f k8s-specifications/
-vote "vote" created
-deployment "db" created
-deployment "db" created
-service "db" created
-deployment "redis" created
-service "redis" created
-deployment "result" created
-service "result" created
-deployment "vote" created
-service "vote" created
-deployment "worker" created
 ```
 
-The vote interface is then available on port 31000 on each host of the cluster, the result one is available on port 31001.
+The `vote` web app is then available on port 31000 on each host of the cluster, the `result` web app is available on port 31001.
+
+To remove them, run:
+
+```shell
+kubectl delete -f k8s-specifications/
+```
 
 ## Architecture
 

k8s-specifications/db-deployment.yaml

@@ -4,7 +4,6 @@ metadata:
   labels:
     app: db
   name: db
-  namespace: vote
 spec:
   replicas: 1
   selector:

k8s-specifications/db-service.yaml

@@ -4,7 +4,6 @@ metadata:
   labels:
     app: db
   name: db
-  namespace: vote
 spec:
   type: ClusterIP
   ports:

k8s-specifications/redis-deployment.yaml

@@ -4,7 +4,6 @@ metadata:
   labels:
     app: redis
   name: redis
-  namespace: vote
 spec:
   replicas: 1
   selector:

k8s-specifications/redis-service.yaml

@@ -4,7 +4,6 @@ metadata:
   labels:
     app: redis
   name: redis
-  namespace: vote
 spec:
   type: ClusterIP
   ports:

k8s-specifications/result-deployment.yaml

@@ -4,7 +4,6 @@ metadata:
   labels:
     app: result
   name: result
-  namespace: vote
 spec:
   replicas: 1
   selector:

k8s-specifications/result-service.yaml

@@ -4,7 +4,6 @@ metadata:
   labels:
     app: result
   name: result
-  namespace: vote
 spec:
   type: NodePort
   ports:

k8s-specifications/vote-deployment.yaml

@@ -4,7 +4,6 @@ metadata:
   labels:
     app: vote
   name: vote
-  namespace: vote
 spec:
   replicas: 1
   selector:

k8s-specifications/vote-namespace.yml

@@ -1,5 +0,0 @@
-apiVersion: v1
-kind: Namespace
-metadata:
-  name: vote
-  

k8s-specifications/vote-service.yaml

@@ -4,7 +4,6 @@ metadata:
   labels:
     app: vote
   name: vote
-  namespace: vote
 spec:
   type: NodePort
   ports:

k8s-specifications/worker-deployment.yaml

@@ -4,7 +4,6 @@ metadata:
   labels:
     app: worker
   name: worker
-  namespace: vote
 spec:
   replicas: 1
   selector: