Chainguard Container for rke2-runtime-airgap

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-airgap: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's free tier of Starter container images are built with Wolfi, our minimal Linux undistro.

All other Chainguard Containers are built with Chainguard OS, Chainguard's minimal Linux operating system 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 development, or -dev, variant.

In all other cases, including Chainguard Containers tagged as :latest or with a specific version number, the container images include only an open-source application and its runtime dependencies. These minimal container images typically do not contain a shell or package manager.

Although the -dev container image variants have similar security features as their more minimal versions, they include additional software that is typically not necessary in production environments. We recommend using multi-stage builds to copy artifacts from the -dev variant into a more minimal production image.

Need additional packages?

To improve security, Chainguard Containers include only essential dependencies. Need more packages? Chainguard customers can use Custom Assembly to add packages, either through the Console, chainctl, or API.

To use Custom Assembly in the Chainguard Console: navigate to the image you'd like to customize in your Organization's list of images, and click on the Customize image button at the top of the page.

Learn More

Refer to our Chainguard Containers documentation on Chainguard Academy. Chainguard also offers VMs and Libraries — contact us for access.

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.