# Nginx 主配置文件
# 高可用负载均衡

user  nginx;
worker_processes  auto;

error_log  /var/log/nginx/error.log notice;
pid        /var/run/nginx.pid;

events {
    worker_connections  10240;
    use epoll;
    multi_accept on;
}

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

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for" '
                      'upstream: $upstream_addr '
                      'response_time: $upstream_response_time';

    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    tcp_nopush      on;
    tcp_nodelay     on;
    keepalive_timeout  65;
    types_hash_max_size 2048;

    # Gzip压缩配置
    gzip  on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_min_length 1024;
    gzip_types text/plain text/css text/xml application/json application/javascript application/xml;

    # 请求体大小限制 (用于视频上传)
    client_max_body_size 1024M;
    client_body_buffer_size 128k;

    # 代理超时配置
    proxy_connect_timeout 60s;
    proxy_send_timeout 300s;
    proxy_read_timeout 300s;
    proxy_buffer_size 128k;
    proxy_buffers 4 256k;
    proxy_busy_buffers_size 256k;

    # 代理头配置
    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;

    # 加载upstream配置
    include /etc/nginx/conf.d/upstream.conf;

    # 主服务配置
    server {
        listen       80;
        listen  [::]:80;
        server_name  _;

        # 首页
        location / {
            root   /usr/share/nginx/html;
            index  index.html index.htm;
        }

        # API网关路由
        location /auth/ {
            proxy_pass http://gateway_cluster/auth/;
            proxy_http_version 1.1;
            proxy_set_header Connection "";
        }

        location /user/ {
            proxy_pass http://gateway_cluster/user/;
            proxy_http_version 1.1;
            proxy_set_header Connection "";
        }

        location /content/ {
            proxy_pass http://gateway_cluster/content/;
            proxy_http_version 1.1;
            proxy_set_header Connection "";

            # 视频流优化
            proxy_buffering off;
            proxy_request_buffering off;
        }

        location /comment/ {
            proxy_pass http://gateway_cluster/comment/;
            proxy_http_version 1.1;
            proxy_set_header Connection "";
        }

        location /recommend/ {
            proxy_pass http://gateway_cluster/recommend/;
            proxy_http_version 1.1;
            proxy_set_header Connection "";
        }

        location /admin/ {
            proxy_pass http://gateway_cluster/admin/;
            proxy_http_version 1.1;
            proxy_set_header Connection "";
        }

        # Nacos控制台
        location /nacos/ {
            proxy_pass http://nacos_cluster/nacos/;
            proxy_http_version 1.1;
            proxy_set_header Connection "";
        }

        # Sentinel控制台
        location /sentinel/ {
            proxy_pass http://sentinel_cluster/;
            proxy_http_version 1.1;
            proxy_set_header Connection "";
        }

        # MinIO API
        location /minio/ {
            proxy_pass http://minio_cluster/;
            proxy_http_version 1.1;
            proxy_set_header Connection "";
            proxy_buffering off;
        }

        # MinIO控制台
        location /minio-console/ {
            proxy_pass http://minio_console_cluster/;
            proxy_http_version 1.1;
            proxy_set_header Connection "";
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
        }

        # 健康检查端点
        location /health {
            access_log off;
            return 200 'OK';
            add_header Content-Type text/plain;
        }

        # 状态监控页面
        location /nginx_status {
            stub_status on;
            access_log off;
            allow 192.168.1.0/24;
            deny all;
        }

        # 错误页面
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   /usr/share/nginx/html;
        }
    }
}

# TCP/UDP 流代理 (用于Redis, MySQL等)
stream {
    # MySQL负载均衡
    upstream mysql_cluster {
        server 192.168.1.101:3306 weight=1;
        server 192.168.1.102:3306 weight=1 backup;
        server 192.168.1.103:3306 weight=1 backup;
    }

    server {
        listen 13306;
        proxy_pass mysql_cluster;
        proxy_connect_timeout 10s;
    }

    # Redis负载均衡 (读写分离)
    upstream redis_master {
        server 192.168.1.101:6379;
    }

    server {
        listen 16379;
        proxy_pass redis_master;
        proxy_connect_timeout 5s;
    }

    # Redis Sentinel
    upstream redis_sentinel {
        server 192.168.1.101:26379;
        server 192.168.1.102:26379;
        server 192.168.1.103:26379;
    }

    server {
        listen 26379;
        proxy_pass redis_sentinel;
    }
}