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说明：
已经安装好的 nginx，需要添加一个未被编译安装的模块，需要怎么弄呢？
具体：
这里以安装第三方 ngx_http_google_filter_module 模块为例
nginx 的模块是需要重新编译 nginx，而不是像 apache 一样配置文件引用.so
1. 下载第三方扩展模块 ngx_http_google_filter_module
# cd /data/software/
# git clone https://github.com/cuber/ngx_http_google_filter_module
2. 查看 nginx 编译安装时安装了哪些模块
# nginx -V
nginx version: nginx/1.8.0
built by gcc 4.4.7 20120313 (Red Hat 4.4.7-11) (GCC)
built with OpenSSL 1.0.1e-fips 11 Feb 2013
TLS SNI support enabled
configure arguments: –prefix=/usr/local/nginx –with-http_ssl_module –with-http_sub_module –with-http_gzip_static_module –with-http_stub_status_module –add-module=/data/software/ngx_http_substitutions_filter_module
可以看出编译安装使用了 –prefix=/usr/local/nginx –with-http_ssl_module –with-http_sub_module –with-http_gzip_static_module –with-http_stub_status_module –add-module=/data/software/ngx_http_substitutions_filter_module 这些参数。–add-module=/data/software/ngx_http_substitutions_filter_module 是之前编译添加 ngx_http_substitutions_filter_module 模块时添加
3. 加入需要安装的模块，重新编译，如这里添加–add-module=/data/software/ngx_http_google_filter_module
# ./configure –prefix=/usr/local/nginx –with-http_ssl_module –with-http_sub_module –with-http_gzip_static_module –with-http_stub_status_module –add-module=/data/software/ngx_http_substitutions_filter_module –add-module=/data/software/ngx_http_google_filter_module
# make // 千万不要 make install，不然就真的覆盖了
4. 替换 nginx 二进制文件:
# cp /usr/local/nginx/sbin/nginx /usr/local/nginx/sbin/nginx.bak
# cp ./objs/nginx /usr/local/nginx/sbin/
