Containers from scratch

Writing a container in a few lines of Go code, as seen at DockerCon 2017 and on O'Reilly Safari.

Note that the Go code uses some syscall definitions that are only available when building with GOOS=linux.

Usage

Create a chroot environment:

podman run -d --rm --name alpine_3 docker.io/library/alpine:3.14 sleep 1000
podman export alpine_3 -o /tmp/alpine_3.tar
podman stop alpine_3
mkdir alpinefs
tar xf /tmp/alpine_3.tar -C alpine

Now run the Go code:

go build -o container
./container run /bin/sh