kubernetes-sigs/cluster-api

Launch ControlePlane in existing cluster

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#7,475 opened on Nov 1, 2022

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Description

User Story

As a user/operator, I would like to launch cluster master in kubernetes; it'll avoid additional provider (only provider for the worker node) and save cost by container/pod.

Detailed Description

Currently, I'm using Metal3 provider to manage workers; but it's cost concern to use bare-metals for master and it's complex to set additional VMs, e.g. BYOH ( https://metal3.io/blog/2022/07/08/One_cluster_multiple_providers.html ). So I'd like to manager cluster master in current k8s cluster by introducing a new ControlPlane.

Anything else you would like to add:

Here's an implementation (only kube-apiserver) at https://github.com/openbce/kink , I'd like to work with community to move forward.

/kind feature

Contributor guide

Research direction
Study the kink implementation (https://github.com/openbce/kink) and the Cluster API control plane provider interface to design a solution for running a control plane inside an existing cluster. Investigate how to integrate this with the existing provider model.
Tech stack
go
Domain
backendinfrastructuredevops
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
GoKubernetes
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
35