Create a YAML file named multi.yml:

  apiVersion: v1
  kind: Pod
  metadata:
    name: multi
    namespace: baz
  spec:
    containers:
    - name: nginx
      image: nginx
    - name: redis
      image: redis

Save the file

Create the multi-container pod:

  kubectl create -f multi.yml

Check the status of the pod:

  kubectl get pods -n baz

Create a Pod Which Uses a Sidecar to Expose the Main Container’s Log File to Stdout

Create a YAML file named logging-sidecar.yml:

  vim logging-sidecar.yml

In the file, paste the following:

  apiVersion: v1
  kind: Pod
  metadata:
    name: logging-sidecar
    namespace: baz
  spec:
    containers:
    - name: busybox1
      image: busybox
      command: ['sh', '-c', 'while true; do echo Logging data > /output/output.log; sleep 5; done']
      volumeMounts:
      - name: sharedvol
        mountPath: /output
    - name: sidecar
      image: busybox
      command: ['sh', '-c', 'tail -f /input/output.log']
      volumeMounts:
      - name: sharedvol
        mountPath: /input
    volumes:
    - name: sharedvol
      emptyDir: {}

Save the file

Create the logging-sidecar pod:

  kubectl create -f logging-sidecar.yml

Check the status of the pod

  kubectl get pods -n baz

Check the logging-sidecar logs:

  kubectl logs logging-sidecar -n baz -c sidecar

Armand.nz

Multi-Container Pods and emptyDir for shared volumed

Create a Pod Which Uses a Sidecar to Expose the Main Container’s Log File to Stdout