Viewing container logs in Docker - Mini Project: Build & Apply

Viewing container logs

📖 Scenario: You are running a web application inside a Docker container. To check if the application is working correctly, you need to view the logs generated by the container.

🎯 Goal: Learn how to view logs from a running Docker container using the docker logs command.

📋 What You'll Learn

Create and run a Docker container with a specific name

Identify the container name to view logs

Use the docker logs command to see the container output

💡 Why This Matters

🌍 Real World

Viewing logs helps developers and operators understand what is happening inside containers, especially when debugging or monitoring applications.

💼 Career

Knowing how to check container logs is essential for DevOps engineers and system administrators to maintain healthy containerized applications.

1

Create and run a Docker container

Run a Docker container named mywebapp using the nginx image in detached mode.

Docker

# Run the nginx container named mywebapp in detached mode
# Your code here

Need a hint?

Use docker run -d --name mywebapp nginx to start the container in the background.

2

Check running containers

Use the docker ps command to list running containers and confirm that mywebapp is running.

Docker

docker run -d --name mywebapp nginx
# List running containers to see mywebapp
# Your code here

Need a hint?

Type docker ps to see all running containers.

3

View logs of the container

Use the docker logs mywebapp command to view the logs generated by the mywebapp container.

Docker

docker run -d --name mywebapp nginx
docker ps
# View logs of the mywebapp container
# Your code here

Need a hint?

Use docker logs mywebapp to see the container output logs.

4

Display logs with timestamps

Use the docker logs --timestamps mywebapp command to view the logs with timestamps for better understanding of when events happened.

Docker

docker run -d --name mywebapp nginx
docker ps
docker logs mywebapp
# View logs with timestamps for mywebapp
# Your code here

Need a hint?

Add --timestamps option to docker logs to see when each log entry was created.