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https://github.com/plunder-app/kube-vip

Kubernetes Control Plane Virtual IP and Load-Balancer
https://github.com/plunder-app/kube-vip

bgp control-plane edge kube-vip kubernetes kubernetes-cluster kubernetes-services load-balancer raspberry-pi service-loadbalancer vip

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Kubernetes Control Plane Virtual IP and Load-Balancer

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README 

        
# kube-vip



High Availability and Load-Balancing



![](https://github.com/kube-vip/kube-vip/raw/main/kube-vip.png)



[![Build and publish main image regularly](https://github.com/kube-vip/kube-vip/actions/workflows/main.yaml/badge.svg)](https://github.com/kube-vip/kube-vip/actions/workflows/main.yaml)



## Overview

Kubernetes Virtual IP and Load-Balancer for both control plane and Kubernetes services



The idea behind `kube-vip` is a small self-contained Highly-Available option for all environments, especially:



- Bare-Metal

- Edge (arm / Raspberry PI)

- Virtualisation

- Pretty much anywhere else :)



**NOTE:** All documentation of both usage and architecture are now available at [https://kube-vip.io](https://kube-vip.io).



## Features



Kube-Vip was originally created to provide a HA solution for the Kubernetes control plane, over time it has evolved to incorporate that same functionality into Kubernetes service type [load-balancers](https://kubernetes.io/docs/concepts/services-networking/service/#loadbalancer).



- VIP addresses can be both IPv4 or IPv6

- Control Plane with ARP (Layer 2) or BGP (Layer 3)

- Control Plane using either [leader election](https://godoc.org/k8s.io/client-go/tools/leaderelection) or [raft](https://en.wikipedia.org/wiki/Raft_(computer_science))

- Control Plane HA with kubeadm (static Pods)

- Control Plane HA with K3s/and others (daemonsets)

- Service LoadBalancer using [leader election](https://godoc.org/k8s.io/client-go/tools/leaderelection) for ARP (Layer 2)

- Service LoadBalancer using multiple nodes with BGP

- Service LoadBalancer address pools per namespace or global

- Service LoadBalancer address via (existing network DHCP)

- Service LoadBalancer address exposure to gateway via UPNP

- ... manifest generation, vendor API integrations and many more...



## Why?



The purpose of `kube-vip` is to simplify the building of HA Kubernetes clusters, which at this time can involve a few components and configurations that all need to be managed. This was blogged about in detail by [thebsdbox](https://twitter.com/thebsdbox/) here -> [https://thebsdbox.co.uk/2020/01/02/Designing-Building-HA-bare-metal-Kubernetes-cluster/#Networking-load-balancing](https://thebsdbox.co.uk/2020/01/02/Designing-Building-HA-bare-metal-Kubernetes-cluster/#Networking-load-balancing).



### Alternative HA Options



`kube-vip` provides both a floating or virtual IP address for your kubernetes cluster as well as load-balancing the incoming traffic to various control-plane replicas. At the current time to replicate this functionality a minimum of two pieces of tooling would be required:



**VIP**:

- [Keepalived](https://www.keepalived.org/)

- [UCARP](https://ucarp.wordpress.com/)

- Hardware Load-balancer (functionality differs per vendor)



**LoadBalancing**:

- [HAProxy](http://www.haproxy.org/)

- [Nginx](http://nginx.com)

- Hardware Load-balancer (functionality differs per vendor)



All of these would require a separate level of configuration and in some infrastructures multiple teams in order to implement. Also when considering the software components, they may require packaging into containers or if they’re pre-packaged then security and transparency may be an issue. Finally, in edge environments we may have limited room for hardware (no HW load-balancer) or packages solutions in the correct architectures might not exist (e.g. ARM). Luckily with `kube-vip` being written in GO, it’s small(ish) and easy to build for multiple architectures, with the added security benefit of being the only thing needed in the container.



## Troubleshooting and Feedback



Please raise issues on the GitHub repository and as mentioned check the documentation at [https://kube-vip.io](https://kube-vip.io/).



## Contributing



Thanks for taking the time to join our community and start contributing! We welcome pull requests. Feel free to dig through the [issues](https://github.com/kube-vip/kube-vip/issues) and jump in.



:warning: This project has issue compiling on MacOS, please compile it on linux distribution



## Star History



[![Star History Chart](https://api.star-history.com/svg?repos=kube-vip/kube-vip&type=Date)](https://star-history.com/#kube-vip/kube-vip&Date)