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[](https://discord.gg/zHnyXKSQFD) | ||
[](https://github.com/containers/youki/graphs/contributors) | ||
[](https://github.com/containers/youki/actions) | ||
[](https://github.com/containers/youki/actions) | ||
[](https://codecov.io/gh/containers/youki) | ||
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<p align="center"> | ||
<img src="docs/youki.png" width="450"> | ||
</p> | ||
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youki is an implementation of the [OCI runtime-spec](https://github.com/opencontainers/runtime-spec) in Rust, similar to [runc](https://github.com/opencontainers/runc). | ||
**youki** is an implementation of the [OCI runtime-spec](https://github.com/opencontainers/runtime-spec) in Rust, similar to [runc](https://github.com/opencontainers/runc). | ||
Your ideas are welcome [here](https://github.com/containers/youki/issues/10). | ||
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# Quick Start | ||
# 🏷️ About the name | ||
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youki is pronounced as /joʊki/ or yoh-key. | ||
youki is named after the Japanese word 'youki', which means 'a container'. In Japanese language, youki also means 'cheerful', 'merry', or 'hilarious'. | ||
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# 🚀 Quick Start | ||
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> [!TIP] | ||
> You can immediately set up your environment with youki on GitHub Codespaces and try it out. | ||
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[User Documentation](https://containers.github.io/youki/user/basic_setup.html#quick-install) | ||
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# About the name | ||
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youki is pronounced as /joʊki/ or yoh-key. | ||
youki is named after the Japanese word 'youki', which means 'a container'. In Japanese language, youki also means 'cheerful', 'merry', or 'hilarious'. | ||
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# Motivation | ||
# 🎯 Motivation | ||
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Here is why we are writing a new container runtime in Rust. | ||
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- Rust is one of the best languages to implement the oci-runtime spec. Many very nice container tools are currently written in Go. However, the container runtime requires the use of system calls, which requires a bit of special handling when implemented in Go. This is too tricky (e.g. _namespaces(7)_, _fork(2)_); with Rust, it's not that tricky. And, unlike in C, Rust provides the benefit of memory safety. While Rust is not yet a major player in the container field, it has the potential to contribute a lot: something this project attempts to exemplify. | ||
- youki has the potential to be faster and use less memory than runc, and therefore work in environments with tight memory usage requirements. Here is a simple benchmark of a container from creation to deletion. | ||
| Runtime | Time (mean ± σ) | Range (min … max) | | ||
| :-----: | :-----------------: | :-----------------: | | ||
| youki | 198.4 ms ± 52.1 ms | 97.2 ms … 296.1 ms | | ||
| runc | 352.3 ms ± 53.3 ms | 248.3 ms … 772.2 ms | | ||
| crun | 153.5 ms ± 21.6 ms | 80.9 ms … 196.6 ms | | ||
<details> | ||
| Runtime | Time (mean ± σ) | Range (min … max) | vs youki(mean) | Version | | ||
| -------- | -------- | -------- | -------- | -------- | | ||
| youki | 111.5 ms ± 11.6 ms | 84.0 ms ± 142.5 ms | 100% | 0.3.3 | | ||
| runc | 224.6 ms ± 12.0 ms | 190.5 ms ± 255.4 ms | 200% | 1.1.7 | | ||
| crun | 47.3 ms ± 2.8 ms | 42.4 ms ± 56.2 ms | 42% | 1.15 | | ||
<details> | ||
<summary>Details about the benchmark</summary> | ||
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- A command used for the benchmark | ||
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```console | ||
$ ./youki info | ||
Version 0.0.1 | ||
Kernel-Release 5.11.0-41-generic | ||
Kernel-Version #45-Ubuntu SMP Fri Nov 5 11:37:01 UTC 2021 | ||
Version 0.3.3 | ||
Commit 4f3c8307 | ||
Kernel-Release 6.5.0-35-generic | ||
Kernel-Version #35~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Tue May 7 09:00:52 UTC 2 | ||
Architecture x86_64 | ||
Operating System Ubuntu 21.04 | ||
Cores 12 | ||
Total Memory 32025 | ||
Cgroup setup hybrid | ||
Operating System Ubuntu 22.04.4 LTS | ||
Cores 16 | ||
Total Memory 63870 | ||
Cgroup setup unified | ||
Cgroup mounts | ||
blkio /sys/fs/cgroup/blkio | ||
cpu /sys/fs/cgroup/cpu,cpuacct | ||
cpuacct /sys/fs/cgroup/cpu,cpuacct | ||
cpuset /sys/fs/cgroup/cpuset | ||
devices /sys/fs/cgroup/devices | ||
freezer /sys/fs/cgroup/freezer | ||
hugetlb /sys/fs/cgroup/hugetlb | ||
memory /sys/fs/cgroup/memory | ||
net_cls /sys/fs/cgroup/net_cls,net_prio | ||
net_prio /sys/fs/cgroup/net_cls,net_prio | ||
perf_event /sys/fs/cgroup/perf_event | ||
pids /sys/fs/cgroup/pids | ||
unified /sys/fs/cgroup/unified | ||
CGroup v2 controllers | ||
cpu detached | ||
cpuset detached | ||
hugetlb detached | ||
io detached | ||
memory detached | ||
pids detached | ||
device attached | ||
Namespaces enabled | ||
mount enabled | ||
uts enabled | ||
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pid enabled | ||
network enabled | ||
cgroup enabled | ||
$ ./youki --version | ||
youki version 0.0.1 | ||
commit: 0.0.1-0-0be33bf | ||
$ runc -v | ||
runc version 1.0.0-rc93 | ||
commit: 12644e614e25b05da6fd08a38ffa0cfe1903fdec | ||
spec: 1.0.2-dev | ||
go: go1.13.15 | ||
libseccomp: 2.5.1 | ||
$ crun --version | ||
crun version 0.19.1.45-4cc7 | ||
commit: 4cc7fa1124cce75dc26e12186d9cbeabded2b710 | ||
spec: 1.0.0 | ||
+SYSTEMD +SELINUX +APPARMOR +CAP +SECCOMP +EBPF +CRIU +YAJL | ||
Capabilities | ||
CAP_BPF available | ||
CAP_PERFMON available | ||
CAP_CHECKPOINT_RESTORE available | ||
``` | ||
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</details> | ||
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- I have fun implementing this. In fact, this may be the most important. | ||
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# Related project | ||
# 📍 Status of youki | ||
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- [containers/oci-spec-rs](https://github.com/containers/oci-spec-rs) - OCI Runtime and Image Spec in Rust | ||
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# Status of youki | ||
**youki** has aced real-world use cases, including containerd's e2e test, and is now adopted by several production environments. | ||
We have [our roadmap](https://github.com/orgs/containers/projects/15). | ||
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youki is not at the practical stage yet. However, it is getting closer to practical use, running with docker and passing all the default tests provided by [opencontainers/runtime-tools](https://github.com/opencontainers/runtime-tools). | ||
 | ||
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| Feature | Description | State | | ||
|:---------------------:|:-----------------------------------------------:| :-------------------------------------------------------------------------------------------------: | | ||
| Containerd | Running via Containerd | ✅ | | ||
| Docker | Running via Docker | ✅ | | ||
| Podman | Running via Podman | ✅ | | ||
| pivot_root | Change the root directory | ✅ | | ||
| Mounts | Mount files and directories to container | ✅ | | ||
| Namespaces | Isolation of various resources | ✅ | | ||
| Capabilities | Limiting root privileges | ✅ | | ||
| Cgroups v1 | Resource limitations, etc | ✅ | | ||
| Cgroups v2 | Improved version of v1 | Support is complete except for devices. WIP on [#230](https://github.com/containers/youki/issues/230) | | ||
| Systemd cgroup driver | Setting up a cgroup using systemd | ✅ | | ||
| Seccomp | Filtering system calls | ✅ | | ||
| Hooks | Add custom processing during container creation | ✅ | | ||
| Rootless | Running a container without root privileges | ✅ | | ||
| OCI Compliance | Compliance with OCI Runtime Spec | ✅ 50 out of 50 test cases passing | | ||
| CRIU Integration | Functionality to checkpoint/restore containers | Initial checkpoint support as described in [#641](https://github.com/containers/youki/pull/641) | | ||
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# Design and implementation of youki | ||
# 🔗 Related project | ||
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- [containers/oci-spec-rs](https://github.com/containers/oci-spec-rs) - OCI Runtime and Image Spec in Rust | ||
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# 🎨 Design and implementation of youki | ||
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The User and Developer Documentation for youki is hosted at [https://containers.github.io/youki/](https://containers.github.io/youki/) | ||
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 | ||
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# Getting Started | ||
# 🎬 Getting Started | ||
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Local build is only supported on Linux. | ||
For other platforms, please use the [Vagrantfile](#setting-up-vagrant) that we have prepared. You can also spin up a fully preconfigured development environment in the cloud with [GitHub Codespaces](https://docs.github.com/en/codespaces/getting-started/quickstart). | ||
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just youki-dev # or youki-release | ||
``` | ||
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# Community | ||
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We also have an active [Discord](https://discord.gg/h7R3HgWUct) if you'd like to come and chat with us. | ||
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There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. Maybe we should add the discord link in the docs contributing section, I don't think it is there right now. |
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# Contribution | ||
# 👥 Community and Contibuting | ||
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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](https://twitter.com/utam0k). | ||
Please refer to [our community page](https://containers.github.io/youki/community/introduction.html). | ||
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Thanks to all the people who already contributed! | ||
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I think we should keep this part, even though not strictly necessary.
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I agree :)
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okay!