《Nginx负载均衡配置实战：如何应对千万级并发》

Nginx负载均衡配置基础www.china-dsky.com

Nginx通过upstream模块实现负载均衡，需在http块中定义后端服务器组。基本配置格式如下：www.zh-jx.cn

http {
    upstream backend {
        server backend1.example.com;
        server backend2.example.com;
    }
}

支持四种负载均衡算法：轮询（默认）、weight（权重）、ip_hash（会话保持）、least_conn（最少连接）。权重配置示例：www.renhe-hotel.com

upstream backend {
    server 192.168.1.101 weight=5;
    server 192.168.1.102 weight=3;
}

高并发场景优化策略www.hzjsyx.com

启用TCP长连接减少握手开销：www.51zwb.com

upstream backend {
    keepalive 32;
    server 192.168.1.101:8080;
}

调整缓冲区大小应对大流量：www.cceg-ev.com

proxy_buffers 8 16k;
proxy_buffer_size 32k;

启用响应缓存降低后端压力：www.anglijixie.cn

proxy_cache_path /data/nginx/cache levels=1:2 keys_zone=mycache:10m inactive=60m;
proxy_cache mycache;

健康检查与容灾机制www.zxt365.cn

被动健康检查配置：www.sxxjf.com

upstream backend {
    server 192.168.1.101 max_fails=3 fail_timeout=30s;
    server 192.168.1.102 backup;
}

主动健康检查需搭配第三方模块：www.ahhrdq.cn

health_check interval=5s uri=/health_check;

动态扩展与自动化www.020f.cn

结合Consul实现服务发现：www.jinluxuan.cc

upstream backend {
    consul 127.0.0.1:8500 service=php-fpm;
}

使用OpenResty进行动态路由：www.china-esm.com

location / {
    content_by_lua_block {
        ngx.exec("@backend_"..ngx.var.arg_zone)
    }
}

监控与性能调优www.bbtown.cn

启用Stub Status模块监控：www.israeltrade.org.cn

location /nginx_status {
    stub_status;
    allow 127.0.0.1;
    deny all;
}

关键性能参数调整：www.sysljz.com

worker_processes auto;
worker_rlimit_nofile 100000;
events {
    worker_connections 2048;
    multi_accept on;
}