https://github.com/dlespiau/balance

Client side load balancing for Kubernetes clusters
https://github.com/dlespiau/balance

kubernetes load-balancer service-mesh services

Last synced: 20 days ago
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Client side load balancing for Kubernetes clusters

• Host: GitHub
• URL: https://github.com/dlespiau/balance
• Owner: dlespiau
• License: apache-2.0
• Created: 2018-05-14T11:21:38.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2021-05-06T17:24:55.000Z (over 3 years ago)
• Last Synced: 2024-06-19T05:55:30.930Z (5 months ago)
• Topics: kubernetes, load-balancer, service-mesh, services
• Language: Go
• Homepage:
• Size: 61.5 KB
• Stars: 18
• Watchers: 6
• Forks: 1
• Open Issues: 7
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        
# Client-side L7 load balancing for Kubernetes Services

This repository implements in-process L7 load balancing algorithms for

Kubernetes processes.

- Go library for your Go microservices.

- Uses the Kubernetes built-in Service discovery mechanism to find out which

  endpoints requests can be routed to.

- Offers an abstraction to implement a variety of L7 load balancing mechanisms.

- Implements affinity and non-affinity algorithms.

- List of supported algorithms:

  - [Consistent hashing](https://en.wikipedia.org/wiki/Consistent_hashing)

  - [Consistent hashing with bounded Loads](https://arxiv.org/abs/1608.01350)

## Using the library

XXX

## Sure but, why?

The Kubernetes Service abstraction is implemented as a L4 load balancer using

iptables DNAT on each node to route the Service Virtual IPs to pod IPs.

Unfortunately, this leaves user without much control about where the requests

are going. Worse there are cases where L4 fails entirely to load balance

anything: think about HTTP/2 multiplexing all requests onto the same

connection!

My Kubecon talk (Copenhagen, May 2018), [The Untapped

Power of Services - L7 Load Balancing Without a Service Mesh](

https://kccnceu18.sched.com/event/ENvv/the-untapped-power-of-services-l7-load-balancing-without-a-service-mesh-damien-lespiau-weaveworks-advanced-skill-level)

gives a lot more details about the reasons I've started this work.

The talk is available in video format: