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Docker

Testing Dockerfile setups

To quickly verify whether a Dockerfile is properly configured, try independently running docker build outside of docker compose.

For example, with the Api.Dockerfile: 

docker build -t <image_name> -f <dockerfile_path> .

Docker Commands

  • docker exec -it [CONTAINER_ID] /bin/bash or /bin/sh to get terminal a container
  • docker ps lists running containers, their status, and ports
  • Remove 'everything' in Docker (images, etc.): docker system prune -a
  • Remove all containers: docker container prune
  • Remove all volumes: docker volume prune
  • Remove all 'dangling' images: docker rmi $(docker images -f "dangling=true" -q)
  • List containers: docker container ps --all
  • Stop container: docker stop <container-id>
  • Delete stopped container: docker rm <container-id>
  • List images: docker images
  • Delete image: docker image rm <image-id>
  • Docker Compose Anchors and Extensions

Docker Compose

Docker compose 2 looks for docker-compose.yml to begin orchestration. However, it then also looks at docker-compose.override.yml to override/merge the settings from the base configuration. See the merge compose files documentation for the detailed rules on how this happens.