Nginx优化全攻略之Stream模块-技术学堂

Nginx自1.9.0版本新增了stream模块，可以实现对四层TCP/UDP协议的转发、代理、负载均衡等，比如本文中的实例就有mysql、zookeeper和dns的代理或负载方法。

安装stream模块

如果是编译安装nginx，需要加上“--with-stream”参数，比如：

./configure --prefix=/opt/nginx --with-stream

顺便给一个比较全的编译安装命令：

./configure --prefix=/opt/nginx \
--pid-path=/var/run/nginx/nginx.pid \
--lock-path=/var/lock/nginx.lock \
--error-log-path=/var/log/nginx/error.log \
--http-log-path=/var/log/nginx/access.log \
--with-http_gzip_static_module \
--http-client-body-temp-path=/var/temp/nginx/client \
--http-proxy-temp-path=/var/temp/nginx/proxy \
--http-fastcgi-temp-path=/var/temp/nginx/fastcgi \
--http-uwsgi-temp-path=/var/temp/nginx/uwsgi \
--http-scgi-temp-path=/var/temp/nginx/scgi \
--with-ipv6 \
--with-stream \
--with-http_ssl_module

如果是yum安装nginx，可以独立安装stream模块：

yum -y install nginx-mod-stream

配置stream模块

stream {
    log_format proxy    '$remote_addr [$time_local] '
                        '$protocol $status $bytes_sent $bytes_received '
                        '$session_time "$upstream_addr" '
                        '"$upstream_bytes_sent" "$upstream_bytes_received" "$upstream_connect_time"';
    access_log          /var/log/nginx/stream-access.log proxy;
    open_log_file_cache off;
    include             /etc/nginx/conf.d/*.stream;
}

以下是代理/负载mysql的实例：

upstream mysql {
    hash $remote_addr consistent;
    server    10.10.100.100:3306 max_fails=3 fail_timeout=30s;
    server    10.10.100.101:3306 weight=9;
    server    10.10.100.102:3306 weight=1;
}
server {
    listen                13306;
    proxy_connect_timeout 30s;
    proxy_timeout         1h;
    proxy_pass            mysql;
    allow                 10.10.200.0/24;
    deny                  all;
}

以下是代理zookeeper的实例：

upstream zookeeper {
    server 10.10.100.200:2181 weight=5;
}
server {
    listen          12181 tcp;
    proxy_responses 1;
    proxy_timeout   15s;
    proxy_pass      zookeeper;
}

以下是DNS负载的实例(udp)：

upstream dns {
    server 10.10.200.101:53;
    server 10.10.200.102:53;
}
server {
    listen          53 udp;
    proxy_responses 1;
    proxy_timeout   15s;
    proxy_bind      $server_addr:$remote_port;
    proxy_pass      dns;
}

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