nginx.conf

# Configuración de Nginx para Sistema de Verificación Arquitectónica
# Fase 5: Optimización y Producción

events {
    worker_connections 1024;
}

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    # Logging
    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" '
                    '"$http_user_agent" "$http_x_forwarded_for"';

    access_log /var/log/nginx/access.log main;
    error_log /var/log/nginx/error.log warn;

    # Configuración básica
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;
    client_max_body_size 100M;

    # Compresión
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types
        text/plain
        text/css
        text/xml
        text/javascript
        application/json
        application/javascript
        application/xml+rss
        application/atom+xml
        image/svg+xml;

    # Rate limiting
    limit_req_zone $binary_remote_addr zone=api:10m rate=10r/s;
    limit_req_zone $binary_remote_addr zone=upload:10m rate=2r/s;

    # Upstream para la aplicación principal
    upstream app_backend {
        server app:5000;
        keepalive 32;
    }

    # Upstream para Rasa
    upstream rasa_backend {
        server rasa:5005;
        keepalive 16;
    }

    # Upstream para Basico
    upstream basico_backend {
        server basico-verification:8000;
        keepalive 16;
    }

    # Servidor principal
    server {
        listen 80;
        server_name localhost;

        # Health check
        location /health {
            access_log off;
            return 200 "healthy\n";
            add_header Content-Type text/plain;
        }

        # API principal
        location /api/ {
            limit_req zone=api burst=20 nodelay;
            
            proxy_pass http://app_backend;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection 'upgrade';
            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;
            proxy_cache_bypass $http_upgrade;
            proxy_read_timeout 1800s;  # 30 minutos para análisis complejos
            proxy_connect_timeout 75s;
            proxy_send_timeout 1800s;  # 30 minutos para envío
        }

        # Conversaciones (Rasa)
        location /conversation/ {
            limit_req zone=api burst=10 nodelay;
            
            proxy_pass http://rasa_backend/;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection 'upgrade';
            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;
            proxy_cache_bypass $http_upgrade;
        }

        # Basico health check
        location /basico/health {
            proxy_pass http://basico_backend/health;
            proxy_http_version 1.1;
            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;
        }

        # Basico complete analysis endpoint
        location /basico/analyze/complete/(.*) {
            limit_req zone=api burst=5 nodelay;
            
            proxy_pass http://basico_backend/basico/analyze/complete/$1;
            proxy_http_version 1.1;
            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;
            proxy_read_timeout 1800s; # Allow long processing for analysis
            proxy_connect_timeout 75s;
            proxy_send_timeout 1800s;
        }

        # Basico verification system
        location /basico/ {
            limit_req zone=api burst=20 nodelay;
            
            proxy_pass http://basico_backend/basico/;
            proxy_http_version 1.1;
            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;
            proxy_read_timeout 120s;
            proxy_connect_timeout 30s;
            proxy_send_timeout 120s;
        }

        # Uploads con rate limiting especial
        location /upload/ {
            limit_req zone=upload burst=5 nodelay;
            
            proxy_pass http://app_backend/upload/;
            proxy_http_version 1.1;
            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;
            proxy_read_timeout 600s;
            proxy_connect_timeout 75s;
        }

        # Archivos estáticos del frontend
        location ~* \.(css|js|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
            root /usr/share/nginx/html;
            expires 1y;
            add_header Cache-Control "public, immutable";
            try_files $uri =404;
        }

        # Archivos estáticos de la API
        location /static/ {
            proxy_pass http://app_backend/static/;
            expires 1y;
            add_header Cache-Control "public, immutable";
        }

        # Frontend principal
        location / {
            root /usr/share/nginx/html;
            try_files $uri $uri/ /index.html;
            index index.html;
        }

        # Monitoreo (solo para desarrollo)
        location /metrics {
            allow 172.20.0.0/16;  # Solo red interna
            deny all;
            proxy_pass http://app_backend/metrics;
        }
    }

    # Configuración para HTTPS (producción)
    # server {
    #     listen 443 ssl http2;
    #     server_name localhost;
    #     
    #     ssl_certificate /etc/nginx/ssl/cert.pem;
    #     ssl_certificate_key /etc/nginx/ssl/key.pem;
    #     
    #     # Configuración SSL
    #     ssl_protocols TLSv1.2 TLSv1.3;
    #     ssl_ciphers ECDHE-RSA-AES256-GCM-SHA512:DHE-RSA-AES256-GCM-SHA512:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384;
    #     ssl_prefer_server_ciphers off;
    #     ssl_session_cache shared:SSL:10m;
    #     ssl_session_timeout 10m;
    #     
    #     # Misma configuración que HTTP
    #     # ... (copiar location blocks de arriba)
    # }
}