HAProxy
Reference for HAProxy as a TCP/HTTP load balancer and reverse proxy: installation, configuration structure, SSL termination, ACL routing, rate limiting, health checks, stats, and database load balancing.
Load-Balancer
MetalLB
MetalLB provides LoadBalancer-type services for bare-metal Kubernetes clusters using Layer 2 (ARP/NDP) or BGP advertisement. Covers installation, IP pool configuration, L2 and BGP setup, and troubleshooting.