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="v1.36.0"
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="v1.36.0"
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

Documentation

• CRI crictl CLI
• CRI validation test suite
• CRI performance benchmarking

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/a/kubernetes.io/g/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.