docker.md

Docker Lunch n Learn - Matthew Johnson 4/25/2018

Notes

• docker build -t name .

  • builds container from image with name
  • looks at Dockerfile

• docker run, docker run -it -p 3200:80 -e ENV=QA legacy

  • looks at Dockerfile
  • -it interactive terminal, -p port, -e env variables
  • starts container created from docker build

• docker-compose up

  • docker-compose.yml
  • way to define and manage multiple containers that may depend on each other

• layer caching in Dockerfile

  • put things that change most often at the bottom

• networking

  • -p 3200:80 host_port:docker_local_port

• env variables

  • env variables should come from docker-compose.yml for local dev
  • in prod, they should come from the environment

• docker ps -a - list all containers

• docker ps - list all running containers

• get container id from ps command

  • docker inspect :id - lots of info about container
  • docker logs :id - logs

Questions

• when to build?