cri-tools

CLI and validation tools for Kubelet Container Runtime Interface (CRI) .

What is the scope of this project?

cri-tools aims to provide a series of debugging and validation tools for Kubelet CRI, which includes:

crictl: CLI for kubelet CRI.
critest: validation test suites for kubelet CRI.

What is not in scope for this project?

Building a new kubelet container runtime based on CRI.
Managing pods/containers for CRI-compatible runtimes by end-users, e.g. pods created by crictl may be removed automatically by kubelet because of non-exist on the kube-apiserver.

Compatibility matrix: cri-tools ⬄ Kubernetes

Kubernetes Version	cri-tools Version	cri-tools branch
≥ 1.27.x	≥ 1.27.x	master
≥ 1.16.x ≤ 1.26.x	≥ 1.16.x ≤ 1.26.x	master
1.15.X	v1.15.0	release-1.15
1.14.X	v1.14.0	release-1.14
1.13.X	v1.13.0	release-1.13
1.12.X	v1.12.0	release-1.12
1.11.X	v1.11.1	release-1.11
1.10.X	v1.0.0-beta.2	release-1.10
1.9.X	v1.0.0-alpha.1	release-1.9
1.8.X	v0.2	release-1.8
1.7.X	v0.1	release-1.7

It's recommended to use the same cri-tools and Kubernetes minor version, because new features added to the Container Runtime Interface (CRI) may not be fully supported if they diverge.

cri-tools follows the Kubernetes release cycles with respect to its minor versions (1.x.y). Patch releases (1.x.z) for Kubernetes are not in sync with those from cri-tools, because they are scheduled for each month, whereas cri-tools provides them only if necessary. If a Kubernetes release goes End of Life, then the corresponding cri-tools version can be considered in the same way.

All new minor versions of cri-tools are being created from the master branch, whereas corresponding release-1.x branches will be created if a patch release is planned.

See the roadmap for information about current and future milestones.

Install

Install crictl

VERSION="v1.31.1"
wget https://github.com/kubernetes-sigs/cri-tools/releases/download/$VERSION/crictl-$VERSION-linux-amd64.tar.gz
sudo tar zxvf crictl-$VERSION-linux-amd64.tar.gz -C /usr/local/bin
rm -f crictl-$VERSION-linux-amd64.tar.gz

Install critest

VERSION="v1.31.1"
wget https://github.com/kubernetes-sigs/cri-tools/releases/download/$VERSION/critest-$VERSION-linux-amd64.tar.gz
sudo tar zxvf critest-$VERSION-linux-amd64.tar.gz -C /usr/local/bin
rm -f critest-$VERSION-linux-amd64.tar.gz

deb/rpm packages

Packages for various distributions using deb's and rpm's are available in the OBS repository.

Documentation

Community, discussion, contribution, and support

Learn how to engage with the Kubernetes community on the community page.

You can reach the maintainers of this project at:

Slack: #sig-node
Mailing List: https://groups.google.com/forum/#!forum/kubernetes-sig-node

Contributing

Interested in contributing? Check out the documentation.

Code of conduct

Participation in the Kubernetes community is governed by the Kubernetes Code of Conduct.