Container resource usage stats in Docker - Mini Project: Build & Apply

Container resource usage stats

📖 Scenario: You are managing Docker containers on your local machine. You want to check how much CPU and memory each container is using to keep your system healthy.

🎯 Goal: Learn to use Docker commands to list running containers and display their CPU and memory usage statistics.

📋 What You'll Learn

Use the docker ps command to list running containers.

Use the docker stats --no-stream command to get resource usage of containers.

Filter the output to show only container IDs, names, CPU %, and memory usage.

💡 Why This Matters

🌍 Real World

Monitoring container resource usage helps keep applications running smoothly and prevents system overload.

💼 Career

DevOps engineers and system administrators regularly check container stats to maintain healthy infrastructure.

1

List running Docker containers

Run the command docker ps --format "{{.ID}} {{.Names}}" to list all running containers showing only their IDs and names.

Docker

# Run the command to list container IDs and names
# Your code here

Need a hint?

This command lists running containers with their IDs and names in a simple format.

2

Add option to show resource usage once

Run the command docker stats --no-stream --format "{{.Container}} {{.Name}} {{.CPUPerc}} {{.MemUsage}}" to show CPU and memory usage of running containers only once.

Docker

docker ps --format "{{.ID}} {{.Names}}"
# Run the command to show CPU and memory usage once
# Your code here

Need a hint?

The --no-stream option makes docker stats show usage once instead of continuously.

3

Filter output to show only container ID, name, CPU %, and memory usage

Use the command docker stats --no-stream --format "{{.Container}} {{.Name}} {{.CPUPerc}} {{.MemUsage}}" to display only container ID, name, CPU percentage, and memory usage.

Docker

docker ps --format "{{.ID}} {{.Names}}"
docker stats --no-stream --format "{{.Container}} {{.Name}} {{.CPUPerc}} {{.MemUsage}}"
# Confirm output shows only container ID, name, CPU %, and memory usage
# Your code here

Need a hint?

The format string controls which columns appear in the output.

4

Display the container resource usage stats

Run the command docker stats --no-stream --format "{{.Container}} {{.Name}} {{.CPUPerc}} {{.MemUsage}}" and observe the output showing container resource usage.

Docker

docker ps --format "{{.ID}} {{.Names}}"
docker stats --no-stream --format "{{.Container}} {{.Name}} {{.CPUPerc}} {{.MemUsage}}"
# Run the command to display resource usage stats
# Your code here

Need a hint?

The output will show each container's ID, name, CPU percentage, and memory usage.