CPU requests and limits in Kubernetes - Mini Project: Build & Apply

CPU Requests and Limits in Kubernetes

📖 Scenario: You are managing a Kubernetes cluster for a small web application. To ensure the application runs smoothly without using too many resources, you need to set CPU requests and limits for the application pod.

🎯 Goal: Learn how to define CPU requests and limits in a Kubernetes pod configuration to control resource usage effectively.

📋 What You'll Learn

Create a pod configuration with a container named webapp

Set the CPU request to 250m (250 millicores)

Set the CPU limit to 500m (500 millicores)

Use the correct YAML structure for resource requests and limits

💡 Why This Matters

🌍 Real World

Setting CPU requests and limits is essential in Kubernetes to ensure applications get enough resources without overloading the cluster.

💼 Career

Understanding resource management in Kubernetes is a key skill for DevOps engineers and cloud administrators.

1

Create the basic pod YAML skeleton

Create a YAML file with a pod named cpu-demo-pod and a container named webapp using the image nginx. Include the required fields: apiVersion, kind, metadata, and spec with the container definition.

Kubernetes

apiVersion: v1
kind: Pod
metadata:
  name: cpu-demo-pod
spec:
  containers:
  - name: webapp
    image: nginx
    # Your code here

Need a hint?

Start with the basic pod structure and container details.

2

Add CPU requests to the container

Add a resources section under the webapp container. Inside resources, add requests with cpu: "250m" to request 250 millicores of CPU.

Kubernetes

apiVersion: v1
kind: Pod
metadata:
  name: cpu-demo-pod
spec:
  containers:
  - name: webapp
    image: nginx
    # Add CPU requests here

Need a hint?

Indent resources under the container, then add requests with the CPU value.

3

Add CPU limits to the container

Extend the resources section by adding limits with cpu: "500m" to limit CPU usage to 500 millicores.

Kubernetes

apiVersion: v1
kind: Pod
metadata:
  name: cpu-demo-pod
spec:
  containers:
  - name: webapp
    image: nginx
    resources:
      requests:
        cpu: "250m"
      # Add CPU limits here

Need a hint?

Under resources, add limits with the CPU limit value.

4

Display the final pod YAML

Print the complete YAML configuration for the pod named cpu-demo-pod with the container webapp that has CPU requests and limits set.

Kubernetes

# Print the YAML configuration
# Your code here

Need a hint?

Show the full YAML text as the output.