kubectl logs for debugging in Kubernetes - Mini Project: Build & Apply

Using kubectl logs for Debugging Kubernetes Pods

📖 Scenario: You are managing a Kubernetes cluster where a web application is running inside a pod. Sometimes the application crashes or behaves unexpectedly. To find out what is wrong, you need to check the logs of the pod.This project will guide you step-by-step to use kubectl logs command to fetch logs from a pod for debugging.

🎯 Goal: Learn how to use kubectl logs to view logs of a Kubernetes pod to help debug issues.

📋 What You'll Learn

Have access to a Kubernetes cluster with kubectl configured

Know the exact pod name to fetch logs from

Understand basic kubectl commands

💡 Why This Matters

🌍 Real World

Developers and operators use kubectl logs to check what is happening inside containers running in Kubernetes. Logs help find errors and understand application behavior.

💼 Career

Knowing how to use kubectl logs is essential for Kubernetes administrators, DevOps engineers, and developers working with containerized applications.

1

Identify the pod name

Create a variable called pod_name and set it to the exact pod name webapp-pod-12345.

Kubernetes

# Create a variable called pod_name and set it to 'webapp-pod-12345'
pod_name = ''  # Your code here

Need a hint?

The pod name is a string. Use single quotes around it.

2

Set the container name

Create a variable called container_name and set it to the container name webapp-container inside the pod.

Kubernetes

pod_name = 'webapp-pod-12345'
# Create a variable called container_name and set it to 'webapp-container'
container_name = ''  # Your code here

Need a hint?

The container name is also a string. Use single quotes.

3

Write the kubectl logs command

Create a variable called logs_command that stores the exact command string to get logs from the pod using kubectl logs with the pod name and container name variables. The command should be: kubectl logs webapp-pod-12345 -c webapp-container.

Kubernetes

pod_name = 'webapp-pod-12345'
container_name = 'webapp-container'
# Create a variable logs_command with the command string to get logs from the pod and container
logs_command = ''  # Your code here

Need a hint?

Use an f-string to insert the variables into the command string.

4

Print the logs command

Write a print statement to display the logs_command variable.

Kubernetes

pod_name = 'webapp-pod-12345'
container_name = 'webapp-container'
logs_command = f"kubectl logs {pod_name} -c {container_name}"
# Print the logs_command variable

Need a hint?

Use print(logs_command) to show the command.