之前已经编译好了nginx，但是此时需要添加一个未被编译的模块，此处以--with-http_realip_module为例。

1、查看当前nginx编译安装时安装了哪些模块
nginx -V

|---|----------| | 1 | nginx -V |

nginx version: nginx/1.12.2 built by gcc 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC) built with OpenSSL 1.0.2k-fips TLS SNI support enabled configure arguments: --user=www --group=www --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module --with-http_v2_module --with-http_gzip_static_module --with-http_sub_module

|-----------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | 1 2 3 4 5 | nginx version: nginx/1.12.2 built by gcc 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC) built with OpenSSL 1.0.2k-fips TLS SNI support enabled configure arguments: --user=www --group=www --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module --with-http_v2_module --with-http_gzip_static_module --with-http_sub_module |

2、加入--with-http_sub_module模块，重新编译（注意：最后不需要执行make install）
cd /usr/local/src/ wget http://nginx.org/download/nginx-1.12.2.tar.gz tar zxf nginx-1.12.2.tar.gz cd /usr/local/src/nginx-1.12.2 ./configure --user=www --group=www --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module --with-http_v2_module --with-http_gzip_static_module --with-http_sub_module --with-http_realip_module make

|-------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | 1 2 3 4 5 6 | cd /usr/local/src/ wget http://nginx.org/download/nginx-1.12.2.tar.gz tar zxf nginx-1.12.2.tar.gz cd /usr/local/src/nginx-1.12.2 ./configure --user=www --group=www --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module --with-http_v2_module --with-http_gzip_static_module --with-http_sub_module --with-http_realip_module make |

3、备份源文件并替换nginx的二进制文件
mv /usr/local/nginx/sbin/nginx /usr/local/nginx/sbin/nginx.bak cp objs/nginx /usr/local/nginx/sbin/nginx

|-----|----------------------------------------------------------------------------------------------------------| | 1 2 | mv /usr/local/nginx/sbin/nginx /usr/local/nginx/sbin/nginx.bak cp objs/nginx /usr/local/nginx/sbin/nginx |

4、验证
nginx -V

|---|----------| | 1 | nginx -V |

nginx version: nginx/1.12.2 built by gcc 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC) built with OpenSSL 1.0.2k-fips TLS SNI support enabled configure arguments: --user=www --group=www --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module --with-http_v2_module --with-http_gzip_static_module --with-http_sub_module --with-http_realip_module

|-----------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | 1 2 3 4 5 | nginx version: nginx/1.12.2 built by gcc 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC) built with OpenSSL 1.0.2k-fips TLS SNI support enabled configure arguments: --user=www --group=www --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module --with-http_v2_module --with-http_gzip_static_module --with-http_sub_module --with-http_realip_module |