Compose watch for development in Docker - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of using docker-compose in development?

It helps to define and run multi-container Docker applications easily, allowing developers to start all services with a single command.

intermediate

How does docker-compose help with watching file changes during development?

By mounting local source code into containers, docker-compose allows the app inside the container to see file changes immediately, enabling live reload or hot reload.

beginner

What is the role of volumes in docker-compose.yml for development?

Volumes map local files or directories into the container, so changes made locally are reflected inside the container instantly.

beginner

Which command starts docker-compose in a way that shows real-time logs and keeps the process running?

The command docker-compose up starts the containers and streams their logs to your terminal, helping you watch the app during development.

intermediate

Why is it important to use depends_on in docker-compose.yml during development?

It ensures that services start in the correct order, for example, the database starts before the app, preventing errors during development.

What does mounting a volume in docker-compose do during development?

A Deletes local files automatically

B Creates a backup of container files

C Syncs local files with the container for live updates

D Compresses container data

Mounting a volume syncs local files with the container, allowing live updates during development.

Which command shows live logs of your containers in docker-compose?

A docker-compose build

B docker-compose logs -f

C docker-compose stop

D docker-compose down

docker-compose logs -f streams live logs from running containers.

What is the benefit of using depends_on in docker-compose.yml?

A Controls the order services start

B Increases container speed

C Limits container memory

D Encrypts container data

depends_on controls the order services start to avoid errors.

How do you keep containers running and watch changes during development?

A Use <code>docker-compose up</code> with volume mounts

B Use <code>docker-compose down</code>

C Use <code>docker-compose rm</code>

D Use <code>docker-compose build</code> only

Using docker-compose up with volume mounts keeps containers running and watches changes.

What happens if you don't mount your source code as a volume in development?

A Container will run faster

B Docker will crash

C Container will automatically update code

D Code changes won't reflect inside the container

Without volume mounts, code changes on your machine won't appear inside the container.

Explain how to set up docker-compose to watch for code changes during development.

Think about syncing your local files with the container and keeping it running.

Describe the benefits of using docker-compose watch setup in a development workflow.

Focus on how it helps you work faster and avoid manual steps.