k8s-node-collector

packaged by Chainguard

Chainguard Container for k8s-node-collector

Collects Kubernetes node file permissions and configuration for trivy-operator's CIS infra-assessment scans.

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/k8s-node-collector: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 k8s-node-collector image is comparable to the upstream node-collector image and is designed to be a drop-in replacement for it in the Trivy Operator. It differs from the upstream image in the following ways:

• It's built on Chainguard OS instead of a 2023 Alpine snapshot, and its Go dependencies are kept current for security fixes.
• The entrypoint is node-collector, as in the upstream image. The binary is installed at /usr/bin/node-collector instead of /usr/local/bin/node-collector, which only matters if you call it by its full path.
• It includes busybox, because the collector runs each audit command through sh -c.

Like the upstream image, this image runs as root. The collector reads the permissions and ownership of root-owned kubelet, etcd, and control plane files on each node, which the CIS Kubernetes Benchmark checks require.

Getting Started

You don't run this image directly. When infra assessment scanning is enabled, which is the Trivy Operator's default, the operator starts a node-collector Job on each node and turns its output into a ClusterInfraAssessmentReport.

To use this image with the community Trivy Operator Helm chart, start by adding the chart repository:

helm repo add aqua https://aquasecurity.github.io/helm-charts/
helm repo update

Then create a values file that points the node-collector Job at this image:

cat > values.yaml <<EOF
nodeCollector:
  registry: cgr.dev
  repository: ORGANIZATION/k8s-node-collector
  tag: latest
EOF

Install the chart with that values file:

helm install trivy-operator aqua/trivy-operator \
  --namespace trivy-system \
  --create-namespace \
  --values values.yaml

After the operator's first scan cycle, each node has a report:

kubectl get clusterinfraassessmentreports

Documentation and Resources

• k8s-node-collector GitHub repository
• Trivy Operator 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.