youki: A container runtime in Rust

youki is an implementation of runtime-spec in Rust, referring to runc. This project is in the experimental stage at this point. I think Rust is one of the best languages to implement oci-runtime, so I'm having fun experimenting with it.

Build

Two types of building are available: devcontainer or local. You can choose whichever you like, but the local one will only work on Linux.

Local

Requires

• Rust(See here)
• Docker

Build

$ git clone git@github.com:utam0k/youki.git
$ cargo build
$ RUST_BACKTRACE=full YOUKI_LOG_LEVEL=debug YOUKI_MODE=/var/lib/docker/containers/ dockerd --experimental --add-runtime="youki=$(pwd)/target/x86_64-unknown-linux-gnu/debug/youki"

Devcontainer

We prepared devcontainer as a development environment. If you use devcontainer for the first time, please refer to this page.

The following explanation assumes that devcontainer is used. The first time it starts up will take a while, so have a cup of coffee and wait ;)

Requires

• VSCode
• Docker

Build

This commands should be run runs in your local terminal.

$ git clone git@github.com:utam0k/youki.git
$ code youki

And use devcontainer in your vscode.

dockerd is already running when you start devcontainer. You can get more information about the startup process by referring to .devcontainer/scripts/init.sh.

Usage

youki with Docker

$ docker run -it --rm --runtime youki hello-world
$ docker run -it --rm --runtime youki busybox

Integration test

$ /workspaces/youki/.devcontainer/scripts/setup_test.sh # only the first time
$ /workspaces/youki/.devcontainer/scripts/test.sh

HelloWorld with youki

Do Hello, World using the log function of Youki. If you want to explore youki, please use it.

Try adding the following code to the line in src/main.rs after initializing the logger of the main function and try to cargo build in your terminal.

log::debug!("Hello, World");

When you run busybox, sh will start and stop.

$ docker run -it --rm --runtime youki --name youki busybox

If you run the following command in a different terminal, you will see the Hello, World that you added above.

$ docker logs youki

Features

• somehow works
• run with docker
• namespace
• capabilities
• cgroups v1
  • devices
  • cpu
  • cpuacct
  • cpuset
  • memory
  • freezer
  • net_cls
  • blkio
  • perf_event
  • net_prio
  • hugetlb
  • pids
  • rdma
• rlimits
• hooks

Contribution

This project welcomes your PR and issues. For example, refactoring, adding features, correcting English, etc. If you need any help, you can contact me on Twitter.