Chainguard Container for linkerd-cni-plugin

Init container that sets up the iptables rules to forward traffic into the Linkerd2 sidecar proxy

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/linkerd-cni-plugin:latest

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

Compatibility Notes

Chainguard's linkerd-cni-plugin image is comparable to Linkerd's cni-plugin image.

Getting started

This image is meant to be deployed into a cluster following the Linkerd CNI plugin documentation, changing the respective image to the Chainguard image wherever possible

Currently, Linkerd CNI plugin can be installed via Helm and the Linkerd CLI:

Linkerd CLI

Before deploying Linkerd to your cluster, install the CNI using the following command:

linkerd install-cni --cni-image "cgr.dev/ORGANIZATION/linkerd-cni-plugin" --cni-image-version "latest" | kubectl apply -f -

latest can be replaced by the image version you want to run.

You can check if the CNI got correctly installed:

linkerd check --pre --linkerd-cni-enabled

Then you can install Linkerd into your cluster as expected following upstream documentation

Upgrading the CNI plugin via the Linkerd CLI

The deployed Chainguard Linkerd CNI image can be upgraded by using the specifying the desired image during upgrade:

linkerd install-cni --cni-image "cgr.dev/ORGANIZATION/linkerd-cni-plugin" --cni-image-version "latest" | kubectl apply --prune -l linkerd.io/cni-resource=true -f -

Helm chart

Alternatively, a helm chart installation method is officially supported by Linkerd. To deploy Chainguard's Linkerd CNI plugin image, add the repository

helm repo add linkerd https://helm.linkerd.io/stable
helm repo update

Create a values.yaml manifest, replacing the upstream image with Chainguard's image:

image:
  name: "cgr.dev/ORGANIZATION/linkerd-cni-plugin"
  version: "latest"

Install the chart:

helm install linkerd-cni -n linkerd-cni --create-namespace linkerd/linkerd2-cni --values values.yaml --wait

Then ensure that the CNI plugin got installed correctly by using the Linkerd CLI:

linkerd check --pre --linkerd-cni-enabled

Resources and Documentation

• Linkerd CNI Plugin documentation
• Linkerd CLI documentation
• Linkerd 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.