Virtual Kubelet

This package provides an impelementation of a virtual cluster node using virtual-kubelet.

The implementation is based on several projects, including:

• Virtual Kubelet
• Kubectl
• Client-go
• Azure-Aci

Overview

This project creates a node that registers itself in the virtual cluster. When workloads are scheduled to this node, it simply creates/updates the workload on the host cluster.

Usage

Build/Push the image using (from the root of rancher/k3k):

make build
docker buildx build -f package/Dockerfile . -t $REPO/$IMAGE:$TAG

When running, it is recommended to deploy a k3k cluster with 1 server (with --disable-agent as a server arg) and no agents (so that the workloads can only be scheduled on the virtual node/host cluster).

After the image is built, it should be deployed with the following ENV vars set:

• CLUSTER_NAME should be the name of the cluster.
• CLUSTER_NAMESPACE should be the namespace the cluster is running in.
• HOST_KUBECONFIG should be the path on the local filesystem (in container) to a kubeconfig for the host cluster (likely stored in a secret/mounted as a volume).
• VIRT_KUBECONFIGshould be the path on the local filesystem (in container) to a kubeconfig for the virtual cluster (likely stored in a secret/mounted as a volume).
• VIRT_POD_IP should be the IP that the container is accessible from.

This project is still under development and there are many features yet to be implemented, but it can run a basic nginx pod.