1.7 KiB
binctr
Create fully static, including rootfs embedded, binaries that pop you directly into a container. Can be run by an unprivileged user.
Check out the blog post: blog.jessfraz.com/post/getting-towards-real-sandbox-containers.
This is based off a crazy idea from @crosbymichael who first embedded an image in a binary :D
HISTORY: This project used to use a POC fork of libcontainer until @cyphar got rootless containers into upstream! Woohoo! Check out the original thread on the mailing list.
Building
You will need libapparmor-dev and libseccomp-dev.
Most importantly you need userns in your kernel (CONFIG_USER_NS=y)
or else this won't even work.
# building the alpine example
$ make alpine
Static container created at: ./alpine
# building the busybox example
$ make alpine
Static container created at: ./busybox
Running
$ ./alpine
$ ./busybox --read-only
Cool things
The binary spawned does NOT need to oversee the container process if you run in detached mode with a PID file. You can have it watched by the user mode systemd so that this binary is really just the launcher :)