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```
And the contents of `mv.sh` is:
```sh
cp /sample.war /app
tail -f /dev/null
```
#### Explanation
1. 'war' container only contains the `war` file of your app
2. 'war' container's CMD tries to copy `sample.war` to the `emptyDir` volume path
3. The last line of `tail -f` is just used to hold the container, as Replication Controller does not support one-off task
4. 'tomcat' container will load the `sample.war` from volume path
What's more, if you don't want to enclose a build-in `mv.sh` script in the `war` container, you can use Pod's `command` to do the copy work, here's a example [javaweb-2.yaml](javaweb-2.yaml):
<!-- BEGIN MUNGE: javaweb-2.yaml -->
```yaml
apiVersion: v1
kind: Pod
metadata:
name: javaweb-2
spec:
initContainers:
- image: resouer/sample:v2
name: war
command:
- "cp"
- "/sample.war"
- "/app"
volumeMounts:
- mountPath: /app
name: app-volume
containers:
- image: resouer/mytomcat:7.0
name: tomcat
command: ["sh","-c","/root/apache-tomcat-7.0.42-v2/bin/start.sh"]
volumeMounts:
- mountPath: /root/apache-tomcat-7.0.42-v2/webapps
name: app-volume
ports:
- containerPort: 8080
hostPort: 8001
volumes:
- name: app-volume
emptyDir: {}
```
<!-- END MUNGE: EXAMPLE -->
And the `resouer/sample:v2` Dockerfile is quite simple:
```
FROM busybox:latest
ADD sample.war sample.war
CMD "tail" "-f" "/dev/null"
```
#### Explanation
1. 'war' container only contains the `war` file of your app
2. 'war' container's CMD uses `tail -f` to hold the container, nothing more
3. The `command` will do `cp` after the `war` container is started
4. Again 'tomcat' container will load the `sample.war` from volume path
Done! Now your `war` container contains nothing except `sample.war`, clean enough.
### Test It Out
Create the Java web pod:
```console
$ kubectl create -f examples/javaweb-tomcat-sidecar/javaweb-2.yaml
```
Check status of the pod:
```console
$ kubectl get -w po
NAME READY STATUS RESTARTS AGE
javaweb-2 2/2 Running 0 7s
```
Wait for the status to `0/1` and `Running`. Then you can visit "Hello, World" page on `http://localhost:8001/sample/index.html`
You can also test `javaweb.yaml` in the same way.
### Delete Resources
All resources created in this application can be deleted:
```console
$ kubectl delete -f examples/javaweb-tomcat-sidecar/javaweb-2.yaml
```
<|endoftext|>
# source: k8s_examples/_archived/javaweb-tomcat-sidecar/javaweb-2.yaml type: yaml