API-gateway/nginx.conf at main · ToothCheck/API-gateway · GitHub

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# Upstream definitions for load balancing
upstream mapservice {
  server 192.168.96.193:3000;
}

upstream bookingservice {
  server 192.168.96.193:8081;
  server 192.168.96.193:8082;
}

upstream userservice {
  server 192.168.96.193:8000;
}

upstream statisticsservice {
  server 192.168.96.193:5177;
}

# Cache configuration for different services
proxy_cache_path /var/cache/nginx/bookingservice levels=1:2 keys_zone=bookingservice_cache:10m max_size=10g inactive=60m use_temp_path=off;
proxy_cache_path /var/cache/nginx/userservice levels=1:2 keys_zone=userservice_cache:10m max_size=10g inactive=60m use_temp_path=off;
proxy_cache_path /var/cache/nginx/mapservice levels=1:2 keys_zone=mapservice_cache:10m max_size=10g inactive=60m use_temp_path=off;

# Rate limiting configuration
limit_req_zone $binary_remote_addr zone=api_rate_limit:10m rate=50r/s;

# Server configuration
server {
  listen 80; # Listen on port 80 (HTTP)
  server_name 192.168.96.193; # Server name or IP address

  location / {
        proxy_pass http://statisticsservice; # Pass requests to statisticsservice - this is a websocket connection
        proxy_http_version 1.1; # Use HTTP/1.1
        proxy_set_header Upgrade $http_upgrade; # Forward the Upgrade header
        proxy_set_header Connection "upgrade"; # Keep the connection alive
        proxy_set_header Host $host; # Forward the host header
        proxy_set_header X-Real-IP $remote_addr; # Forward the real IP of the client
  }

  location /api/v1/clinics {
    proxy_pass http://mapservice;

    # Enable caching
    proxy_cache mapservice_cache;
    proxy_cache_valid 200 10m;  # Cache successful responses for 10 minutes
    proxy_cache_use_stale error timeout invalid_header updating http_500 http_502 http_503 http_504;
    proxy_cache_background_update on;
    proxy_cache_lock on;

    # Apply rate limiting
    limit_req zone=api_rate_limit burst=100 nodelay;
  }

  location /api/v1/bookings/ {
    proxy_pass http://bookingservice;

    # Apply rate limiting
    limit_req zone=api_rate_limit burst=100 nodelay;

    # Timeouts for high-traffic endpoint
    proxy_connect_timeout 10s;
    proxy_read_timeout 30s;
    proxy_send_timeout 20s;

    # Enable caching
    # proxy_cache bookingservice_cache;
    # proxy_cache_valid 200 10m;

    # Bypass cache for non-idempotent request methods (POST, PATCH, DELETE)
    # set $bypass_cache 0;
    # if ($request_method = POST) {
    #     set $bypass_cache 1;
    # }
    # if ($request_method = PATCH) {
    #     set $bypass_cache 1;
    # }
    # if ($request_method = DELETE) {  # Consider adding if using DELETE method
    #     set $bypass_cache 1;
    # }
    # proxy_cache_bypass $bypass_cache;

    # proxy_cache_use_stale error timeout invalid_header updating http_500 http_502 http_503 http_504;
    # proxy_cache_background_update on;
    # proxy_cache_lock on;
}

  location /api/v1/patients {
    proxy_pass http://userservice;

    # Apply rate limiting
    limit_req zone=api_rate_limit burst=100 nodelay;

    # Enable caching
    # proxy_cache userservice_cache;
    # proxy_cache_valid 200 5s;  # Cache successful responses for 1 minutes
    # proxy_cache_use_stale error timeout invalid_header updating http_500 http_502 http_503 http_504;
    # proxy_cache_background_update on;
    # proxy_cache_lock on;
  }

  location /api/v1/dentists {
    proxy_pass http://userservice;
  }

  location /api/v1/admins {
    proxy_pass http://userservice;
  }

  location /patient {
    proxy_pass http://userservice;
  }

  location /dentist {
    proxy_pass http://userservice;
  }

  location /admin {
    proxy_pass http://userservice;
  }
}