title: How to communicate between containers in same POD in Kubernetes?
body: <p>For one POD, three images has been created. The problem here is that there is no communication between containers within same pod. How should my application connected with these three containers?</p>
  <p>My pod have below containers.</p>
  <pre><code>[dev-application dev-app-nginx dev-app-redis]
  </code></pre>
  <p>Here I am able see only rails is running but redis and nginx is not running. Because Redis and nix is running as different containers in same pod.</p>
  <pre><code>kubectl exec -ti test-deployment-5f59864c8b-mv4kk sh
  kubectl exec [POD] [COMMAND] is DEPRECATED and will be removed in a future version. Use kubectl exec [POD] -- [COMMAND] instead.
  Defaulting container name to dev-application.
  Use 'kubectl describe pod/test-deployment-5f59864c8b-mv4kk -n dev-app' to see all of the containers in this pod.
  # rails -v
  Rails 4.2.11.3
  # redis -v
  sh: 2: redis: not found
  # nginx -v
  sh: 3: nginx: not found
  # 
  </code></pre>
  <p>Below the yam file I am using</p>
  <pre><code>apiVersion: extensions/v1beta1
  kind: Deployment
  metadata:
    namespace: dev-app
    name: test-deployment
  spec:
    replicas: 1 
    template:
      metadata:
        labels:
          app: Dev-app
      spec:
        nodeSelector:
         cloud.io/sec-zone-green: &quot;true&quot;
        containers:
          - name: dev-application
            image: hub.docker.net/appautomation/dev.app.1.0:latest
              command: [&quot;/bin/sh&quot;]
              args: [&quot;-c&quot;, &quot;while true; do echo test; sleep 20;done&quot;]
            resources:
              limits:
                memory: 8Gi
                cpu: 5
              requests:
                memory: 8Gi
                cpu: 5
            ports:
              - containerPort: 3000
          - name: dev-app-nginx
            image: hub.docker.net/appautomation/dev.nginx.1.0:latest
            resources:
              limits:
                memory: 4Gi
                cpu: 4
              requests:
                memory: 4Gi
                cpu: 4
            ports:
              - containerPort: 80
                         
          - name: dev-app-redis
            image: hub.docker.net/appautomation/dev.redis.1.0:latest
            
            resources:
              limits:
                memory: 4Gi
                cpu: 4
              requests:
                memory: 4Gi
                cpu: 4
            ports:
              - containerPort: 6379
      
          
  </code></pre>