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 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.