Docker Compose for dev environment - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is Docker Compose used for in a development environment?

Docker Compose helps you run and manage multiple containers together easily. It lets you define all your app's services in one file and start them with a single command.

beginner

What file does Docker Compose use to define services?

Docker Compose uses a docker-compose.yml file where you list all your containers, their settings, networks, and volumes.

beginner

How do you start all services defined in a Docker Compose file?

Run the command docker compose up in the folder with your docker-compose.yml. It builds and starts all containers together.

intermediate

Why use volumes in Docker Compose for development?

Volumes let you share code between your computer and the container. This means you can edit files on your computer and see changes immediately inside the container.

beginner

What is the benefit of using Docker Compose over running individual Docker commands?

Docker Compose saves time by managing multiple containers with one file and command. It also keeps your setup organized and easy to share with others.

Which file do you edit to define services in Docker Compose?

A Dockerfile

B docker-compose.yml

C docker.config

D compose.json

The docker-compose.yml file is where you define all services, networks, and volumes for Docker Compose.

What command starts all services in Docker Compose?

A docker compose up

B docker compose start

C docker run compose

D docker build compose

The command docker compose up builds and starts all services defined in the compose file.

Why are volumes useful in a dev environment with Docker Compose?

A They speed up container startup

B They reduce container size

C They allow code changes on host to reflect inside containers immediately

D They secure the container network

Volumes let you share files between your computer and containers, so code edits update instantly inside the container.

Which of these is NOT a benefit of Docker Compose?

A Manage multiple containers with one command

B Define container setup in one file

C Easily share environment setup

D Automatically write application code

Docker Compose does not write code; it manages container setups and orchestration.

In Docker Compose, how do you stop and remove containers, networks, and volumes created by docker compose up?

A docker compose down

B docker compose remove

C docker compose stop

D docker compose clean

The command docker compose down stops and removes containers, networks, and volumes created by docker compose up.

Explain how Docker Compose helps in setting up a development environment with multiple services.

Think about how you would run many containers together without typing many commands.

Describe the role of volumes in Docker Compose for development and why they are important.

Consider how you want to edit code on your computer and see it run inside the container without delays.