nginx load balancer and api

nginx/nginx.conf

@@ -0,0 +1,55 @@
+events {
+    worker_connections 1024;
+}
+
+http {
+    # Upstream API servers - Docker will resolve 'api' to all instances
+    upstream api_servers {
+        # Load balancing method: least_conn sends to least busy server
+        # Other options: round_robin (default), ip_hash, random
+        least_conn;
+
+        # Docker Compose service discovery
+        server api:8000;
+
+        # When scaling manually, you'd list servers like:
+        # server api_1:8000;
+        # server api_2:8000;
+        # server api_3:8000;
+    }
+
+    # Rate limiting zone: 10 requests per second per IP
+    limit_req_zone $binary_remote_addr zone=api_limit:10m rate=10r/s;
+
+    server {
+        listen 80;
+        server_name localhost;
+
+        # Health check endpoint
+        location /health {
+            access_log off;
+            return 200 "OK\n";
+            add_header Content-Type text/plain;
+        }
+
+        # API endpoints
+        location / {
+            # Apply rate limiting with burst
+            limit_req zone=api_limit burst=20 nodelay;
+
+            proxy_pass http://api_servers;
+            proxy_http_version 1.1;
+
+            # Pass client info to backend
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header X-Forwarded-Proto $scheme;
+
+            # Timeouts
+            proxy_connect_timeout 5s;
+            proxy_send_timeout 10s;
+            proxy_read_timeout 10s;
+        }
+    }
+}