Nginx如何重新编译添加模块

1.查看nginx支持的模块

nginx -V

[ ~]# /usr/local/nginx/sbin/nginx -V
nginx version: nginx/1.16.0
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-36) (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_stub_status_module --with-http_realip_module

2.nginx平滑升级

1.重新编译nginx

./configure --prefix=/usr/local/nginx --user=www --group=www --with-http_ssl_module --with-http_stub_status_module --with-http_realip_module --with-http_slice_module&&make

2.备份二进制文件，用新版的替换

3确保配置文件正确(-t)

4.发送USR2信号，Nginx会启动一个新版本的master进程和对应工作进程

[ sbin]# ps aux|grep nginx
root      3737  0.0  0.1  46116  2324 ?        Ss   May22   0:00 nginx: master process /usr/local/nginx/sbi
root      6262  0.0  0.0 112712   992 pts/1    R+   21:58   0:00 grep --color=auto nginx
www      31013  0.0  0.2  49340  4656 ?        S    Jun03   0:06 nginx: worker process
[ sbin]# kill -USR2 3737
[ sbin]# ps aux|grep nginx
root      3737  0.0  0.1  46116  2324 ?        Ss   May22   0:00 nginx: master process /usr/local/nginx/sbin/nginx
root      6373  0.0  0.1  45984  3728 ?        S    21:58   0:00 nginx: master process /usr/local/nginx/sbin/nginx
www       6374  0.0  0.1  48476  2028 ?        S    21:58   0:00 nginx: worker process
root      6400  0.0  0.0 112712   992 pts/1    R+   21:59   0:00 grep --color=auto nginx
www      31013  0.0  0.2  49340  4656 ?        S    Jun03   0:06 nginx: worker process

5.向旧的Nginx主进程（master）发送WINCH信号，它会逐步关闭自己的工作进程（主进程不退出），这时所有请求都会由新版Nginx处理

[ sbin]# kill -WINCH 3737
[ sbin]# ps aux|grep nginx
root      3737  0.0  0.1  46116  2324 ?        Ss   May22   0:00 nginx: master process /usr/local/nginx/sbin/nginx
root      6373  0.0  0.1  45984  3728 ?        S    21:58   0:00 nginx: master process /usr/local/nginx/sbin/nginx
www       6374  0.0  0.1  48476  2028 ?        S    21:58   0:00 nginx: worker process
root      6758  0.0  0.0 112712   988 pts/1    R+   22:00   0:00 grep --color=auto nginx

6.发送QUIT信息

[ sbin]# kill -QUIT 3737
[ sbin]# ps aux|grep nginx
root      6373  0.0  0.1  45984  3728 ?        S    21:58   0:00 nginx: master process /usr/local/nginx/sbin/nginx
www       6374  0.0  0.1  48476  2028 ?        S    21:58   0:00 nginx: worker process
root      7045  0.0  0.0 112712   992 pts/1    R+   22:02   0:00 grep --color=auto nginx

7.如果需要回滚，发送HUP信号（在6之前操作）

[ ~]# kill -HUP 3737