Chainguard Container for cluster-api-ipam-provider-in-cluster

An IPAM provider for Cluster API that manages pools of IP addresses using Kubernetes resources.

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/cluster-api-ipam-provider-in-cluster: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 cluster-api-ipam-provider-in-cluster image is a drop-in replacement for the upstream Cluster API IPAM Provider In-Cluster - registry.k8s.io/capi-ipam-ic/cluster-api-ipam-in-cluster-controller. Chainguard's image contains only the minimum set of dependencies needed to run the IPAM provider manager.

Getting Started

The Cluster API IPAM Provider In-Cluster manages IP address pools for Cluster API clusters using Kubernetes custom resources. It provides automatic IP address allocation and management for nodes and services within your cluster infrastructure.

Basic Usage

You can test the container by running it directly:

docker run --rm cgr.dev/chainguard/cluster-api-ipam-provider-in-cluster:latest --help

Deployment with Cluster API

The IPAM provider is typically deployed as part of a Cluster API management cluster. Initialize your management cluster with the required providers:

clusterctl init \
  --infrastructure docker \
  --ipam in-cluster \
  --core cluster-api \
  --bootstrap kubeadm \
  --control-plane kubeadm

Creating IP Pools

Create IP pools using the InClusterIPPool custom resource:

apiVersion: ipam.cluster.x-k8s.io/v1alpha2
kind: InClusterIPPool
metadata:
  name: my-ip-pool
  namespace: default
spec:
  addresses:
    - 10.0.0.0/24
  prefix: 24
  gateway: 10.0.0.1

Apply the IP pool configuration:

kubectl apply -f ippool.yaml

Cluster Configuration

When creating clusters that use the IPAM provider, reference the IP pool in your cluster configuration:

apiVersion: cluster.x-k8s.io/v1beta1
kind: Cluster
metadata:
  name: my-cluster

The IPAM provider will automatically:

• Monitor IP pool resources for changes
• Allocate IP addresses to cluster nodes as they're created
• Track IP address usage and availability
• Update pool status with allocation information

Documentation and Resources

• Cluster API IPAM Provider In-Cluster GitHub Repository
• Cluster API IPAM Provider Documentation
• Cluster API Quick Start

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.