Multi-Container Pods

 

What is a Multi-Container Pod?

A Multi-Container Pod is a Pod that contains more than one container. These containers run together in the same Pod and share the same network and storage.

Why Use Multi-Container Pods?

Sometimes an application needs a helper container which is also Sidecar Container for tasks such as:

Log collection

Monitoring

Proxy service

Data synchronization

Instead of running them separately, both containers can run inside the same Pod.

Example:

Pod

├── Nginx Application Container (Main Application)

└── BusyBox Logging Container (Log Collector)

Both containers:

Containers work closely together.

Share the same IP address

Can communicate using localhost

Can share volumes (storage)

Multi-Container Pod YAML

apiVersion: v1

kind: Pod

metadata:

  name: multi-container-pod

spec:

  containers:

  - name: nginx

    image: nginx

  - name: busybox

    image: busybox

    command: ["sh", "-c", "while true; do echo Hello; sleep 10; done"]

Create the Pod - kubectl apply -f pod.yaml

Verify - kubectl get pods