General Information

Developing docker images.

Checklist

• Docker installed
• A Dockerfile to build
  • Best practices for Dockerfiles
• Account on docker hub or private registry setup

Build a docker image from a Dockerfile (mytag is usually a version number)

docker build -t myimagename:mytag --file=Dockerfile .

Run a container with an interactive terminal, remove it when stopped, attach a bash shell

docker run -it --rm --name mycontainername myimagename /bin/bash

Login to registry

• Docker Hub

  docker login -u dockerhubuser

• Private Registry

  docker login -u myuserhere https://registryhostname.my.domain.com

Tag a local image:tag with the destination image:tag (usually tag is a version number)

• Docker Hub

  docker tag myimage:mytag dockerhubuser/myimage:mytag

• Private Registry

  docker tag myimage:mytag registryhostname.my.domain.com/myimage:mytag

Push the image:tag to the remote registry

• Docker Hub

  docker push dockerhubuser/myimage:mytag

• Private Registry

  docker push registryhostname.my.domain.com/myimage:mytag

Additional tag with latest (so the most recent version number is also a latest tag)

• Docker Hub

  docker tag myimage:mytag dockerhubuser/myimage:latest

• Private Registry

  docker tag myimage:mytag registryhostname.my.domain.com/myimage:latest

Additional push for latest

• Docker Hub

  docker push dockerhubuser/myimage:latest

• Private Registry

  docker push registryhostname.my.domain.com/myimage:latest

Login to registry

• Docker Hub

  docker login -u dockerhubuser

  • Note: Login only required if docker hub registry is private (they are public by default).
• Private Registry

  docker login -u myuserhere https://registryhostname.my.domain.com

Run container interactively with a bash shell (latest tag is default)

• Docker Hub

  docker run -it --name mycontainername dockerhubuser/myimage /bin/bash

• Private Registry

  docker run -it --name mycontainername registryhostname.my.domain.com/myimage /bin/bash