Docker

Commands

• build: docker build . -t <tag_name>
• connect to a container: docker exec -it <container_name> bash
• delete
  • delete all volumes: docker volume rm $(docker volume ls -q) - docker volume rm - docker volume ls
  • delete all: docker stop $(docker ps -aq) && docker rm $(docker ps -aq) && docker rmi $(docker images -q)
• list containers - docker ps
  • list running containers: docker ps
  • list all containers: docker ps -a
• prune
  • prune all images: docker image prune --all
  • system: docker system prune
  • system with images: docker system prune --all

Dockerfile

• set variables: ARG variable=value
• use variables example: WORKDIR /home/$variable
• optimization tools and how-tos:
  • https://www.fromlatest.io/
  • https://www.augmentedmind.de/2022/02/06/optimize-docker-image-size/
  • https://www.ecloudcontrol.com/best-practices-to-reduce-docker-images-size/

docker-compose

• https://docs.docker.com/compose/
• store config in docker-compose.yml by defaut
• start (build images before starting containers): docker-compose up --build - docker-compose up
  • add -d for detached mode
• stop
  • stop and remove containers: docker-compose down - docker-compose down
  • stop and remove containers and volumes: docker-compose down -v - docker-compose down
• validate and view compose file: docker-compose config - docker-compose config

Docker on Mac

• install docker with brew install docker
• use colima: https://github.com/abiosoft/colima