systemd-nspawn-scripts

Various scripts to create images using systemd-nspawn(1). Requires systemd and a recent-ish kernel.

This is an experiment to create minimal containers on a Linux system. At Dat we're building neato tools to package data, version and securely distribute them over p2p networks. Being able to distribute applications using those tools seems like a pretty cool idea.

Usage

# setup computer
$ ./sync          # Sync the repo to <remote>:~/scripts
$ ./swap          # Create a swap file, needed to build Node on small boxes

# stuff if you're gonna do raw systemd-nspawn (not recommended, but fun)
$ ./btrfs         # Format /var/lib/machines as btrfs
$ ./build-alpine  # Build Alpine Linux
$ ./build-node    # Build Node.js (run this in tmux, it takes a while)

# stuff if you wanna do rkt based stuff (recommended)
$ ./rkt                 # Install rkt & acbuild
$ ./build-node-image    # Build a local node test container
$ ./build-from-git      # Pull & build a git repo that has a ./build.sh script

Todo

• Have Alpine Linux working with systemd-npawn(1)
• Automate swap file creation
• Have Node.js running in Alpine Linux
• Create script to format /var/lib/machines as btrfs
• Update Alpine & Node to be copy-on-write images inside /var/lib/machines
• Create unit file to run systemd-nspawn(1) container
• Validate logging & reboots inside host machine
• Create script to automate unit file creation
• Automate combining Alpine Linux + source dir + unit file into tar
• Automate unpacking source + unit into right locations on disk
• Create hyperdrive http server image
• Create boot script that automates creating http server image

See Also

• https://github.com/containers/build
• https://coreos.com/rkt/docs/latest/running-docker-images.html

License

MIT