Docker 🐋 quick guide

Posted on 18 Oct, 2020

1. Remove docker image.

   docker rmi <img-id>

2. Remove docker container.

   docker rm <container-id>

3. Build a docker image with a name.

   docker build -f <dockerfile-path> -t name .

4. Run a container.

   docker run -p 3000:3000 <container-id>

5. Stop a container.

   docker stop <container-id>

6. Run a container in detach mode (run in background).

   docker run -d <container-id>

   For the love of God always add a -d while running a container. Speaking this from experience.

   If you don't run in detach mode, you won't be able to Ctrl+C (or exit), instead use Ctrl+PC (yes the P key and C key).

7. List docker volumes.

   docker volume ls

8. Remove docker volume.

   docker volume rm <volume-name>

9. Check port mapping.

   docker port <name>

10. Starting a docker container

    docker start <container>

    The first two letters of CONTAINER_ID can be provided as an argument too.

11. Run a command inside container.

    docker container exec <CONTAINER> ls -la

12. Check history of an image.

    docker history <IMAGE>

13. Connect to local port inside container.

    docker run -d --network=host --add-host=host.docker.internal:127.0.0.1

Docker Compose

Tip: Alias docker-compose to an alias like dc to make your life better

1. Build and run containers.

   docker-compose up --build

2. Start compose in detached mode

   docker-compose up -d

3. Stop containers.

   docker-compose stop

4. Check logs/console messages.

   docker-compose logs <image name>
   # or better use docker
   docker logs -f <image name>

   To clear log output, use cmd + k, or ctrl + k

5. List all containers.

   docker-compose ps

Docker Quick Steals

1. Run a postgres container.

   docker run --name postgres --rm -p 5438:5432 -e POSTGRES_PASSWORD=pass -e POSTGRES_DB=test -d postgres

   Get psql using

   docker container exec -it postgres psql -U postgres -d test