Dind for the lulz.

Useful single-shot command for Docker-in-Docker containers.

It will run $HOME/.docker/Dockerfile with some folders mounted:

• /var/run/docker.sock
• $HOME/.bash_history
• $HOME/.gitconfig
• $HOME/.ssh

See included Dockerfile as starting-point for your own setup.

Also you can check the published Dockerfile I'm using at Docker hub.

Usage

Install it globally with npm i -g undock or just use npx, e.g.

$ undock [NAME] [TARGET] [PROJECT] [NETWORK] [...] [-- COMMAND]

Options

• -b, --build — Force image build before attaching
• -p, --ports — Exposed ports from the attached container
• NAME — Container name for the mounted image (default: none)
• TARGET — Build target from the Dockerfile (default: develop)
• PROJECT — Project name for the built image (default: basename $PWD)
• NETWORK — Networking group used for linking containers (default: default)
• -- COMMAND — Additional command to execute (default: /bin/bash)

Networking

Undock will setup the network for you based on given arguments.

However, if you can't see other containers remember connect them, e.g.

# start two containers in separated shells
$ undock web -p 80:4000 -- npm start
$ undock user -- npm start

# create a shared network and connect containers
$ docker network create -d bridge undock
$ docker network connect undock web
$ docker network connect undock user