How to implement volumes-from in Kubernetes Pod?

pod1.yml

---
apiVersion: v1
kind: Pod
metadata:
    name: server
spec:
    containers:
    - image: resouer/sample:v2
      name: war
      lifecycle:
        postStart:
          exec:
            command:
              - "cp"
              - "/sample.war"
              - "/app"
      volumeMounts:
      - mountPath: /app
        name: hostv1 
    - name: peer
      image: busybox
      command: ["tail", "-f", "/dev/null"]
      volumeMounts:
      - name: hostv2
        mountPath: /app/sample.war
    volumes:
    - name: hostv1
      hostPath:
          path: /tmp
    - name: hostv2
      hostPath:
          path: /tmp/sample.war

@akamanocha It works well in your case. Just make sure that Tomcat can automatically load your wars, otherwise you need to restart it manually.

Keep the side car alive so that it doesn't get restarted. This could also be implemented
with pause.
Note: This won't be necessary when per-pod restart policies are implemented
while true; do sleep 10; done

@kjvalencik What do you mean by "pause"? Java Web Application with Tomcat and Sidercar Container keeps its sidecar container alive by invoking tail -f /dev/null.

Guys, this can be solved more elegant by using initContainer, see my update in the original answer: http://stackoverflow.com/questions/30538210/how-to-mimic-volumes-from-in-kubernetes/33118902#33118902