Adding labels to resources in Kubernetes - Mini Project: Build & Apply

Adding labels to resources

📖 Scenario: You are managing a Kubernetes cluster for a small company. To organize and identify resources easily, you want to add labels to your pods. Labels help you group and select resources later.

🎯 Goal: Learn how to add labels to a Kubernetes pod manifest and verify the labels are applied correctly.

📋 What You'll Learn

Create a pod manifest with a specific name

Add a label to the pod metadata

Use kubectl commands to check the labels

Print the pod labels to confirm

💡 Why This Matters

🌍 Real World

Labels are used in Kubernetes to organize, select, and manage resources easily in real clusters.

💼 Career

Knowing how to add and use labels is essential for Kubernetes administrators and DevOps engineers to manage workloads efficiently.

1

Create a basic pod manifest

Create a YAML file named pod.yaml with a pod named myapp-pod in the default namespace. The pod should run the container image nginx.

Kubernetes

# Write the pod manifest YAML with name 'myapp-pod' and image 'nginx'
# Your code here

Need a hint?

Remember to include apiVersion, kind, metadata with name, and spec with containers.

2

Add a label to the pod metadata

Add a label called app with the value myapp under the metadata section in pod.yaml.

Kubernetes

apiVersion: v1
kind: Pod
metadata:
  name: myapp-pod
  namespace: default
  # Add label 'app: myapp' below
spec:
  containers:
  - name: nginx-container
    image: nginx

Need a hint?

Labels go under metadata as a map of key-value pairs.

3

Apply the pod manifest and check labels

Run the command kubectl apply -f pod.yaml to create the pod. Then run kubectl get pod myapp-pod --show-labels to see the labels on the pod.

Kubernetes

# Run the commands to apply the pod and check labels
# Your code here

Need a hint?

Use kubectl apply to create or update resources. Use kubectl get with --show-labels to see labels.

4

Print the pod labels using kubectl describe

Run kubectl describe pod myapp-pod and print the output to confirm the label app=myapp is present under Labels.

Kubernetes

# Run 'kubectl describe pod myapp-pod' and print the output
# Your code here

Need a hint?

The kubectl describe command shows detailed info including labels under the Labels section.