nginx平滑添加stream模块

操作系统版本：CentOS Linux release 7.4.1708 (Core)
nginx版本：1.13.4
nginx从1.9.0版本开始，新增了ngx_stream_core_module模块，使nginx支持四层负载均衡。默认编译的时候该模块并未编译进去，需要编译的时候添加--with-stream，使其支持stream代理。

[root@test-server sbin]# nginx -V
nginx version: nginx/1.13.4
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC) 
built with OpenSSL 1.0.2k-fips  26 Jan 2017
TLS SNI support enabled
configure arguments: --prefix=/usr/local/nginx --user=www --group=www --with-http_ssl_module 
--with-http_gzip_static_module --http-client-body-temp-path=/usr/local/nginx/tmp/client/ 
--http-proxy-temp-path=/usr/local/nginx/tmp/proxy/ --http-fastcgi-temp-path=/usr/local/nginx/tmp/fcgi/ 
--with-poll_module --with-file-aio --with-http_realip_module --with-http_addition_module 
--with-http_addition_module --with-http_random_index_module --with-http_stub_status_module 
--http-uwsgi-temp-path=/usr/local/nginx/uwsgi_temp --http-scgi-temp-path=/usr/local/nginx/scgi_temp 
--with-pcre=/usr/local/src/pcre-8.41

此处nginx源码目录为：/usr/local/src/nginx-1.13.4，即为编译命令执行目录。
 
编译命令如下:./configure --prefix=/usr/local/nginx --user=www --group=www --with-http_ssl_module 
--with-http_gzip_static_module --http-client-body-temp-path=/usr/local/nginx/tmp/client/ 
--http-proxy-temp-path=/usr/local/nginx/tmp/proxy/ --http-fastcgi-temp-path=/usr/local/nginx/tmp/fcgi/ 
--with-poll_module --with-file-aio --with-http_realip_module --with-http_addition_module 
--with-http_addition_module --with-http_random_index_module --with-http_stub_status_module 
--http-uwsgi-temp-path=/usr/local/nginx/uwsgi_temp 
--http-scgi-temp-path=/usr/local/nginx/scgi_temp --with-pcre=/usr/local/src/pcre-8.41 --with-stream

此处nginx源码目录为：/usr/local/src/nginx-1.13.4，即为编译命令执行目录。
make

此处一定不能使用make install命令，执行该命令会将原有nginx目录进行覆盖。

关闭nginx服务
systemctl stop nginx
 
备份原有nginx二进制文件。
cp /usr/local/nginx/sbin/nginx /usr/local/nginx/sbin/nginx-no-strem
 
复制新编译好的nginx二进制文件。从此处nginx源码目录为：/usr/local/nginx-1.13.4。即为编译命令执行目录。
cp ./objs/nginx /usr/local/nginx/sbin/nginx

启动nginx。
systemctl start nginx

查看nginx模块信息。
nginx -V
nginx version: nginx/1.13.4
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC) 
built with OpenSSL 1.0.2k-fips  26 Jan 2017
TLS SNI support enabled
configure arguments: --prefix=/usr/local/nginx --user=www --group=www 
--with-http_ssl_module --with-http_gzip_static_module 
--http-client-body-temp-path=/usr/local/nginx/tmp/client/ 
--http-proxy-temp-path=/usr/local/nginx/tmp/proxy/ 
--http-fastcgi-temp-path=/usr/local/nginx/tmp/fcgi/ 
--with-poll_module --with-file-aio --with-http_realip_module 
--with-http_addition_module --with-http_addition_module 
--with-http_random_index_module --with-http_stub_status_module 
--http-uwsgi-temp-path=/usr/local/nginx/uwsgi_temp 
--http-scgi-temp-path=/usr/local/nginx/scgi_temp 
--with-pcre=/usr/local/src/pcre-8.41 --with-stream

可以看到stream模块已经编译到nginx内了。

stream段的配置要与http段在同级目录。此处引用的为官方nginx说明配置。
stream {
    upstream backend {
        hash $remote_addr consistent;

        server backend1.example.com:12345 weight=5;
        server 127.0.0.1:12345            max_fails=3 fail_timeout=30s;
        server unix:/tmp/backend3;
    }

    upstream dns {
       server 192.168.0.1:53535;
       server dns.example.com:53;
    }

    server {
        listen 12345;
        proxy_connect_timeout 1s;
        proxy_timeout 3s;
        proxy_pass backend;
    }

    server {
        listen 127.0.0.1:53 udp reuseport;
        proxy_timeout 20s;
        proxy_pass dns;
    }

    server {
        listen [::1]:12345;
        proxy_pass unix:/tmp/stream.socket;
    }}

stream {
    upstream zk_server {
        server 172.16.3.8:2181 weight=5;
    }
    server {
        listen 2181 tcp;
        proxy_responses 1;
        proxy_timeout 20s;
        proxy_pass zk_server;
    }}

[Unit]Description=nginx - high performance web server
Documentation=http://nginx.org/en/docs/After=network.target remote-fs.target nss-lookup.target

[Service]Type=forking
PIDFile=/var/run/nginx.pid
ExecStartPre=/usr/local/nginx/sbin/nginx -t -c /usr/local/nginx/conf/nginx.conf
ExecStart=/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
ExecReload=/bin/kill -s HUP $MAINPID
ExecStop=/bin/kill -s QUIT $MAINPID
PrivateTmp=true[Install]