Create a pod named kucc8 with a single app container for each of the following images running inside (there may be between 1 and 4 images specified): nginx + redis + memcached.

Question

Explanation

Kubernetes Multi-Container Pod: kucc8

Overall Goal

Create a single Pod named kucc8 that runs three containers simultaneously - one for each image: nginx, redis, and memcached. This tests your understanding of the Pod spec structure, specifically that a Pod is not limited to one container.

This is correct because Kubernetes Pods are the atomic unit of deployment and natively support multiple containers sharing the same network namespace and (optionally) storage volumes.

The Approach

The fastest correct method on an exam is using kubectl run to generate a base YAML, then editing it to add the remaining containers.

Step-by-Step

Step 1 - Generate a base manifest

kubectl run kucc8 --image=nginx --dry-run=client -o yaml > kucc8.yaml

• --dry-run=client prevents actual creation; -o yaml dumps the spec.
• This gives you a valid skeleton so you don't write YAML from scratch (avoiding typos in indentation or required fields).
• If skipped: Writing raw YAML without a template on exam time is error-prone and slow.

Step 2 - Edit the manifest to add the remaining containers

Open kucc8.yaml and add redis and memcached under spec.containers:

apiVersion: v1
kind: Pod
metadata:
  name: kucc8
spec:
  containers:
  - name: nginx
    image: nginx
  - name: redis
    image: redis
  - name: memcached
    image: memcached

• Each entry in spec.containers is a separate container within the same Pod.
• Container names must be unique within the Pod - using the image name as the container name is the simplest convention.
• If skipped: You'd create a Pod with only nginx, which fails the question entirely.

Step 3 - Apply the manifest

kubectl apply -f kucc8.yaml

• This submits the Pod spec to the API server.
• If you used kubectl create instead, re-running after a fix would fail with "already exists" - apply is idempotent.

Step 4 - Verify

kubectl get pod kucc8
kubectl describe pod kucc8

• Confirm 3/3 containers are Running and the Pod name is exactly kucc8.
• A common mistake is a typo in the Pod name - the exam grader checks the exact name.

What Goes Wrong Without Each Step

Memory Tip

"One Pod, many containers - all siblings under spec.containers."

Think of a Pod as an apartment: each container is a roommate. They share the same address (network/IP) but are separate processes. The exam question is just asking you to move in the right number of roommates.

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