github/glb-director

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

2453 stars · 239 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

GitHub's GLB Director is a set of components implementing a scalable, stateless Layer 4 load balancer for bare metal datacenter environments, using rendezvous hashing and UDP encapsulation with Direct Server Return. It is used in production to serve all traffic from GitHub's datacenters.

Use cases

• build a scalable layer 4 load balancer for a datacenter
• distribute traffic across servers using ECMP and BGP anycast
• handle line-rate packet processing on bare metal
• implement a split L4/L7 load balancing architecture
• avoid flow state sharing between load balancer nodes
• drain servers without disrupting existing connections

When to choose

• you operate bare metal datacenter infrastructure with ECMP routing
• you need a stateless L4 director tier with flow-aware redirection
• you want a production-proven load balancer design from GitHub

When to avoid

• you need a simple software load balancer for cloud VMs or containers
• you require Layer 7 (HTTP) load balancing features
• you lack control over network routing (BGP/ECMP) in your environment

Facets

library · maturity maintenance

networking proxy load-testing networking infrastructure-as-code microservices developer-tools c self-hosted load-balancer layer4 ecmp dpdk gue-encapsulation datacenter bgp direct-server-return linux

Member repositories

For agents

markdown · JSON · MCP: product_card(name="github/glb-director")