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infrastructure/networking/load-balancing/SKILL.md

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+---
+name: load-balancing
+description: Configure load balancers and traffic distribution. Implement health checks and SSL termination. Use when distributing traffic across servers.
+license: MIT
+metadata:
+  author: devops-skills
+  version: "1.0"
+---
+
+# Load Balancing
+
+Distribute traffic across application servers.
+
+## nginx Load Balancer
+
+```nginx
+upstream backend {
+    least_conn;
+    server backend1:8080 weight=3;
+    server backend2:8080;
+    server backend3:8080 backup;
+}
+
+server {
+    listen 80;
+    
+    location / {
+        proxy_pass http://backend;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+    }
+}
+```
+
+## HAProxy
+
+```
+frontend http_front
+    bind *:80
+    default_backend http_back
+
+backend http_back
+    balance roundrobin
+    option httpchk GET /health
+    server web1 10.0.0.1:8080 check
+    server web2 10.0.0.2:8080 check
+```
+
+## AWS ALB
+
+```bash
+aws elbv2 create-load-balancer \
+  --name my-alb \
+  --subnets subnet-xxx subnet-yyy \
+  --security-groups sg-xxx \
+  --type application
+```
+
+## Best Practices
+
+- Implement health checks
+- Use sticky sessions when needed
+- Enable connection draining
+- Monitor backend health