(学习记录一下)
Yum安装
1、添加Nginx源
[root@localhost ~]# rpm -Uvh http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm
2、安装Nginx
[root@localhost ~]# yum -y install nginx
编译安装
1、安装相关依赖包
# nginx的正则rewrite会使用pcre; gzip会使用zlib，ssl会使用openssl
[root@localhost ~]# yum -y install pcre-devel zlib-devel openssl-devel gcc*
2、创建Nginx用户
[root@localhost ~]# useradd -M -s /sbin/nologin nginx
3、编译安装
[root@localhost ~]# tar -zxvf nginx-1.21.5.tar.gz
[root@localhost ~]# cd nginx-1.21.5
[root@localhost ~]# ./configure --prefix=/usr/local/nginx --user=nginx --group=nginx --with-http_ssl_module
[root@localhost ~]# make && make install
--prefix 指定 Nginx 的安装目录
--user 和 --group 指定 Nginx 运行用户和组
--with-http_stub_status_module 启动 http_stub_status_module模块支持状态统计
--with-http_ssl_module 支持https的ssl加密
平滑升级/添加模块
查看当前版本/当前模块
[root@localhost ~]# nginx -V
nginx version: nginx/1.21.5
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-44) (GCC)
built with OpenSSL 1.0.2k-fips 26 Jan 2017
TLS SNI support enabled
configure arguments: --prefix=/usr/local/nginx --with-http_ssl_module
1、重新编译Nginx
[root@localhost ~]# cd nginx-1.21.5
[root@localhost ~]# tar -zxvf nginx-1.21.5.tar.gz
[root@localhost ~]# ./configure --prefix=/usr/local/nginx --user=nginx --group=nginx --with-http_ssl_module --with-http_stub_status_module
[root@localhost ~]# make
2、替换原有nginx二进制文件
[root@localhost ~]# cp -a /usr/local/nginx/sbin/nginx /usr/local/nginx/sbin/nginx.bak
[root@localhost ~]# cp -a nginx-1.21.5/objs/nginx /usr/local/nginx/sbin/nginx
3、发送USR2信号，Nginx会启动一个新版本的master进程
[root@localhost ~]# ps -aux | grep nginx
root 34665 0.0 0.0 46008 1132 ? Ss 17:27 0:00 nginx: master process /usr/local/nginx/sbin/nginx
nobody 34667 0.0 1.5 75228 28628 ? S 17:27 0:00 nginx: worker process
root 34718 0.0 0.0 112824 976 pts/9 R+ 17:28 0:00 grep --color=auto nginx
[root@localhost ~]# kill -USR2 34665
[root@localhost ~]# ps -aux | grep nginx
root 34665 0.0 0.0 46008 1320 ? Ss 17:27 0:00 nginx: master process /usr/local/nginx/sbin/nginx
nobody 34667 0.0 1.5 75228 28628 ? S 17:27 0:00 nginx: worker process
root 34719 0.0 0.1 45996 3312 ? S 17:29 0:00 nginx: master process /usr/local/nginx/sbin/nginx
nobody 34720 0.0 1.5 75216 28644 ? S 17:29 0:00 nginx: worker process
root 34722 0.0 0.0 112824 980 pts/9 R+ 17:29 0:00 grep --color=auto nginx
4、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
[root@localhost ~]# kill -WINCH 34665
[root@localhost ~]# ps -aux | grep nginx
root 34665 0.0 0.0 46008 1320 ? Ss 17:27 0:00 nginx: master process /usr/local/nginx/sbin/nginx
root 34719 0.0 0.1 45996 3312 ? S 17:29 0:00 nginx: master process /usr/local/nginx/sbin/nginx
nobody 34720 0.0 1.5 75216 28644 ? S 17:29 0:00 nginx: worker process
root 34726 0.0 0.0 112824 980 pts/9 R+ 17:29 0:00 grep --color=auto nginx
5、发送QUIT信息
[root@localhost ~]# kill -QUIT 34665
[root@localhost ~]# ps -aux | grep nginx
root 34719 0.0 0.1 45996 3312 ? S 17:29 0:00 nginx: master process /usr/local/nginx/sbin/nginx
nobody 34720 0.0 1.5 75216 28644 ? S 17:29 0:00 nginx: worker process
root 34734 0.0 0.0 112824 980 pts/9 R+ 17:30 0:00 grep --color=auto nginx
6、如果需要回滚，发送HUP信号（在第5步之前操作）
[root@localhost ~]# kill -HUP 34665
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