Chainguard Container for rke2-runtime

Minimal image of RKE2's container runtime

Chainguard Containers are regularly-updated, secure-by-default container images.

Download this Container Image

For those with access, this container image is available on cgr.dev:

docker pull cgr.dev/ORGANIZATION/rke2-runtime:latest

Be sure to replace the ORGANIZATION placeholder with the name used for your organization's private repository within the Chainguard Registry.

Compatibility Notes

rke2-runtime is composed of two image variants:

• cgr.dev/ORGANIZATION/rke2-runtime
• cgr.dev/ORGANIZATION/rke2-runtime-airgap

Chainguard's rke2-runtime container images are comparable to the official rancher/rke2-runtime image.

The rke2-runtime-airgap container image variant includes the addition of the rke2 binary.

Deployment of Chainguard's rke2-runtime image requires the use of our rke2-runtime-airgap image. This is because rke2 had to be patched to support the merge of /bin into /usr/bin.

Getting Started

Docker

You can deploy Chainguard's rke2-runtime image with the following command:

docker run --rm --privileged \
  --network=host \
  --cgroupns=host \
  cgr.dev/ORGANIZATION/rke2-runtime-airgap:latest server \
  -v /path/to/rke2/config:/etc/rancher/rke2 \
  --token=test \
  --runtime-image="cgr.dev/ORGANIZATION/rke2-runtime:latest"

For Air Gapped Environments

To deploy Chainguard's rke2-runtime image in an airgapped environment, start by creating an image preload to be imported.

RKE2 expects the preloaded image to have a reference tag in the following format: vX.Y.Z-rke2r1 Example Tag: rke2-runtime:v1.33.3-rke2r1 This means that images tagged as latest and our -dev images can not be used without retagging them with the above format.

1. First, pull down an image tagged similarly to rke2-runtime:v1.33.3-rke2r1 with Docker:

docker pull cgr.dev/ORGANIZATION/rke2-runtime:v1.33.3-rke2r1

2. Now, you will need to save the image:

docker save --output /tmp/rke2-runtime.tar cgr.dev/ORGANIZATION/rke2-runtime:v1.33.3-rke2r1

3. Finally, you can run the preloaded runtime image:

docker run --rm --privileged \
  --network=host \
  --cgroupns=host \
  cgr.dev/ORGANIZATION/rke2-runtime-airgap server \
  -v /path/to/rke2/config:/etc/rancher/rke2 \
  -v /tmp/rke2-runtime.tar:/var/lib/rancher/rke2/agent/images \
  --token=test \
  --runtime-image="cgr.dev/ORGANIZATION/rke2-runtime:v1.33.3-rke2r1"

Documentation and Resources

For more information on working with RKE2's container runtime, please refer to the official documentation.

What are Chainguard Containers?

Chainguard Containers are minimal container images that are secure by default.

In many cases, the Chainguard Containers tagged as :latest contain only an open-source application and its runtime dependencies. These minimal container images typically do not contain a shell or package manager. Chainguard Containers are built with Wolfi, our Linux undistro designed to produce container images that meet the requirements of a more secure software supply chain.

The main features of Chainguard Containers include:

• Minimal design, without unnecessary software bloat
• Daily builds to ensure container images are up-to-date with available security patches
• High quality build-time SBOMs attesting to the provenance of all artifacts within the image
• Verifiable signatures provided by Sigstore
• Reproducible builds with Cosign and apko (read more about reproducibility)

For cases where you need container images with shells and package managers to build or debug, most Chainguard Containers come paired with a -dev variant.

Although the -dev container image variants have similar security features as their more minimal versions, they feature additional software that is typically not necessary in production environments. We recommend using multi-stage builds to leverage the -dev variants, copying application artifacts into a final minimal container that offers a reduced attack surface that won’t allow package installations or logins.

Learn More

To better understand how to work with Chainguard Containers, please visit Chainguard Academy and Chainguard Courses.

In addition to Containers, Chainguard offers VMs and Libraries. Contact Chainguard to access additional products.

Trademarks

This software listing is packaged by Chainguard. The trademarks set forth in this offering are owned by their respective companies, and use of them does not imply any affiliation, sponsorship, or endorsement by such companies.