Fork the repository ( and use your fork in the YAML below.

apiVersion: v1
kind: Pod
  name: website
    - name: clone-repo
      image: alpine/git
        - git
        - clone
        - --progress
        - <>
        - /usr/share/nginx/html
        - name: web
          mountPath: "/usr/share/nginx/html"
    - name: nginx
      image: nginx
        - name: http
          containerPort: 80
        - name: web
          mountPath: "/usr/share/nginx/html"
    - name: refresh
      image: alpine/git
        - sh
        - -c
        - watch -n 60 git pull
      workingDir: /usr/share/nginx/html
        - name: web
          mountPath: "/usr/share/nginx/html"
    - name: web
      emptyDir: {}

Save the above YAML to sidecar-container.yaml and create the Pod using kubectl apply -f sidecar-container.yaml.

If you run kubectl get pods once the init container has executed, you will notice the READY column now shows 2/2. These numbers tell you right away that this Pod has a total of two containers, and both of them are ready:

$ kubectl get po
website   2/2     Running   0          3m39s

If you set up the port forward to the Pod using kubectl port-forward pod/website 8000:80 command and open the browser to http://localhost:8000, you will see the same webpage as before.

We can open a separate terminal window and watch the logs from the refresh container inside the website Pod:

$ kubectl logs website -c refresh -f

Every 60.0s: git pull
Already up to date.

The watch command is running, and the response from the last git pull command was Already up to date.

Let's make a change to the index.html in the repository you forked - you change some values or add other HTML elements.

Next, you need to stage this and commit it to the master branch. The easiest way to do that is from the Github's webpage. Open the index.html on Github (I am opening, but you should replace my username peterj with your username or the organization you forked the repo to) and click the pencil icon to edit the file.

Make the change to the index.html file and click the Commit changes button to commit them to the branch. Next, watch the output from the refresh container, and you should see the output like this:

Every 60.0s: git pull

From <>
   f804d4c..ad75286  master     -> origin/master
Updating f804d4c..ad75286
 index.html | 1 +
 1 file changed, 1 insertion(+)

The above output indicates changes to the repository. Git pulls the updated file to the shared volume.

Start the port forward command:

kubectl port-forward pod/website 8000:80

Finally, refresh your browser where you have http://localhost:8000 opened, and you will notice the changes on the page.


kubectl delete pod website