load-balancer

# Load Balancer Skill Expert skill for load balancer configuration, algorithm implementation, and high availability design. ## Capabilities - **HAProxy Configuration**: Configure HAProxy for L4/L7 load balancing with advanced features - **NGINX Load Balancing**: Set up NGINX as a reverse proxy and load balancer - **Algorithm Implementation**: Implement round-robin, weighted, least-connections, IP-hash, and consistent hashing - **Health Checking**: Design comprehensive health check strategies (TCP, HTTP, custom) - **Session Persistence**: Configure sticky sessions, cookie-based affinity, and source IP persistence - **Load Distribution Analysis**: Analyze and optimize traffic distribution across backends - **High Availability**: Configure HA pairs with failover using keepalived/VRRP - **SSL/TLS Termination**: Configure TLS termination and re-encryption ## Tools and Dependencies - `HAProxy` - High-performance TCP/HTTP load balancer - `NGINX` - Web server and reverse proxy - `keepalived` - HA and failover - `LVS/IPVS` - Linux Virtual Server - `haproxyctl` - HAProxy management ## Target Processes - layer4-load-balancer.js - layer7-load-balancer.js - health-check-system.js ## Usage Examples ### HAProxy Backend Configuration ```haproxy backend web_servers balance roundrobin option httpchk GET /health http-check expect status 200 server web1 10.0.0.1:80 check weight 100 server web2 10.0.0.2:80 check weight 100 backup ``` ### NGINX Upstream Configuration ...