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https://github.com/sylabs/singularity-cri

The Singularity implementation of the Kubernetes Container Runtime Interface
https://github.com/sylabs/singularity-cri

containers cri hpc kubernetes singularity singularity-cri

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The Singularity implementation of the Kubernetes Container Runtime Interface

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README 

        
# Singularity-CRI



The singularity-cri and wlm-operator projects were created by Sylabs to explore interaction between the Kubernetes and HPC worlds. In 2020, rather than dilute our efforts over a large number of projects, we have focused on Singularity itself and our supporting services. We're also looking forward to introducing new features and technologies in 2021.



At this point we have archived the repositories to indicate that they aren't under active development or maintenance. We recognize there is still interest in singularity-cri and wlm-operator, and we'd like these projects to find a home within a community that can further develop and maintain them. The code is open-source under the Apache License 2.0, to be compatible with other projects in the k8s ecosystem.



Please reach out to us via [email protected] if you are interested in establishing a new home for the projects.



----



[![CircleCI](https://circleci.com/gh/sylabs/singularity-cri.svg?style=svg&circle-token=276de7aa1d82749ecf8ed6513c72399041885dec)](https://circleci.com/gh/sylabs/singularity-cri)

[![Code Coverage](https://codecov.io/gh/sylabs/singularity-cri/branch/master/graph/badge.svg)](https://codecov.io/gh/sylabs/singularity-cri)

[![Go Report Card](https://goreportcard.com/badge/github.com/sylabs/singularity-cri)](https://goreportcard.com/report/github.com/sylabs/singularity-cri)



This repository contains Singularity implementation of

[Kubernetes CRI](https://github.com/kubernetes/community/blob/master/contributors/devel/sig-node/container-runtime-interface.md).

Singularity-CRI consists of two separate services: runtime and image, each of which implements 

K8s RuntimeService and ImageService respectively.



The Singularity-CRI is currently under development and passes 71/74

[validation tests](https://github.com/kubernetes-sigs/cri-tools/blob/master/docs/validation.md).

Note that used test suite is taken from `v1.13.0` tag. Detailed report can be found

[here](https://docs.google.com/spreadsheets/d/1Ym3K4LddqKNc4LCh8jr5flN7YDxfnM_hrLxpeDJRO1k/edit?usp=sharing).



## Quick start



Complete documentation can be found [here](https://sylabs.io/guides/cri/1.0/user-guide). 

Further a quick steps provided to set up Singularity-CRI from source.



In order to use Singularity-CRI install the following:



- [git](https://git-scm.com/downloads)

- [go 1.11+](https://golang.org/doc/install)

- [Singularity 3.1+ with OCI support](https://github.com/sylabs/singularity/blob/master/INSTALL.md)

- [inotify](http://man7.org/linux/man-pages/man7/inotify.7.html) for device plugin

- socat package to perform port forwarding



Since Singularity-CRI is now built with [go modules](https://github.com/golang/go/wiki/Modules)

there is no need to create standard [go workspace](https://golang.org/doc/code.html). If you still

prefer keeping source code under GOPATH make sure GO111MODULE is set. 



The following assumes you are installing Singularity-CRI from source outside GOPATH:

```bash

git clone https://github.com/sylabs/singularity-cri.git && \

cd singularity-cri && \

git checkout tags/v1.0.0-beta.5 -b v1.0.0-beta.5 && \

make && \

sudo make install

```



This will build the _sycri_ binary with CRI implementation. After installation you will find it in `/usr/local/bin`.



Singularity-CRI works with Singularity runtime directly so you need to have

`/usr/local/libexec/singularity/bin` your PATH environment variable.



To start Singularity-CRI simply run _sycri_ binary. By default it listens for requests on

`unix:///var/run/singularity.sock` and stores image files at `/var/lib/singularity`. 

This behaviour may be configured with config file, run `sycri -h` for more details.



## Contributing



Community contributions are always greatly appreciated. To start developing Singularity-CRI,

check out the [guidelines for contributing](CONTRIBUTING.md).



We also welcome contributions to our [user docs](https://github.com/sylabs/singularity-cri-userdocs).



## Support



To get help with Singularity-CRI, check out the [community Portal](https://sylabs.io/resources/community).

Also feel free to raise issues here or contact [maintainers](CONTRIBUTORS.md).



For additional support, [contact us](https://sylabs.io/contact-us) to receive more information.



## License



_Unless otherwise noted, this project is licensed under a Apache 2 license found in the [license file](LICENSE)._