nginx平滑升级与回滚
2019-07-27 本文已影响0人
一剑仙人跪_
1.安装配置1.6版本的 nginx
[root@localhost ~]# yum install -y gcc gcc-c++ pcre-devel openssl-devel zlib-devel
[root@localhost ~]# tar xzf nginx-1.6.3.tar.gz -C /usr/local/
[root@localhost ~]# cd /usr/local/nginx-1.6.3
[root@localhost nginx-1.6.3]# ./configure --prefix=/usr/local/nginx --user=nginx -group=nginx --with-http_stub_status_module
[root@localhost nginx-1.6.3]# make && make install
[root@localhost nginx-1.6.3]# useradd -M -s /sbin/nologin nginx
[root@localhost nginx-1.6.3]# /usr/local/nginx/sbin/nginx -t
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
[root@localhost nginx-1.6.3]# /usr/local/nginx/sbin/nginx
2.查看版本和模块
[root@localhost nginx-1.6.3]# /usr/local/nginx/sbin/nginx -V
nginx version: nginx/1.6.3 built
by gcc 4.8.5 20150623 (Red Hat 4.8.5-36) (GCC)
configure arguments: --prefix=/usr/local/nginx --user=nginx --group=nginx --withhttp_stub_status_module
3.访问验证
[root@localhost nginx-1.6.3]# echo "nginx1.6" > /usr/local/nginx/html/index.html
[root@localhost nginx-1.6.3]# yum install -y elinks
[root@localhost nginx-1.6.3]# elinks 10.0.105.189
4.升级nginx
将 nginx 版本进行升级 并在不影响业务的情况下添加 SSL 和 pcre 模块
[root@localhost ~]# tar xzf nginx-1.12.2.tar.gz -C /usr/local/
[root@localhost ~]# cd /usr/local/nginx-1.12.2/
[root@localhost nginx-1.12.2]# ./configure --prefix=/usr/local/nginx --user=nginx -group=ngiinx --with-http_stub_status_module --with-http_ssl_module --with-pcre
[root@localhost nginx-1.12.2]# make
[root@localhost nginx-1.12.2]# cd
[root@localhost ~]# mv /usr/local/nginx/sbin/nginx /usr/local/nginx/sbin/nginx_lod
[root@localhost ~]# cp /usr/local/nginx-1.12.2/objs/nginx /usr/local/nginx/sbin/
[root@localhost ~]# ps -ef | grep nginx
root 6324 1 0 09:06 ? 00:00:00 nginx: master process /usr/local/nginx-1.12.2/sbin/nginx
nobody 6325 6324 0 09:06 ? 00:00:00 nginx: worker process
root 6338 1244 0 09:11 pts/0 00:00:00 grep --color=auto nginx
[root@localhost ~]# kill -USR2 6324 #此时查看进程 给master进程发送一个热升级进程信号
[root@localhost ~]# ls /usr/local/nginx/logs/ #主进程将重命名它的进程文件 .pid 文件为 .oldbin
access.log error.log nginx.pid nginx.oldbin
[root@localhost ~]# cat /usr/local/nginx/logs/nginx.pid
6340
[root@localhost ~]# ps -ef | grep nginx
root 6324 1 0 09:06 ? 00:00:00 nginx: master process /usr/local/nginx-1.12.2/sbin/nginx
nobody 6325 6324 0 09:06 ? 00:00:00 nginx: worker process
root 6340 6324 0 09:12 ? 00:00:00 nginx: master process /usr/local/nginx-1.12.2/sbin/nginx
nobody 6341 6340 0 09:12 ? 00:00:00 nginx: worker process
root 6343 1244 0 09:12 pts/0 00:00:00 grep --color=auto nginx
在这时,两个 nginx 实例会同时运行,一起处理输入的请求。
要逐步停止旧的实例,你必须发送 WINCH 信号给旧的主进程,然后,它的工作进程就将开始从容关闭
[root@nginx ~]# kill -WINCH 6324
[root@nginx ~]# ps -ef | grep nginx
root 6324 1 0 09:06 ? 00:00:00 nginx: master process /usr/local/nginx-1.12.2/sbin/nginx
root 6340 6324 0 09:12 ? 00:00:00 nginx: master process /usr/local/nginx-1.12.2/sbin/nginx
nobody 6341 6340 0 09:12 ? 00:00:00 nginx: worker process
root 6346 1244 0 09:14 pts/0 00:00:00 grep --color=auto nginx
一段时间后,旧的工作进程处理了所有已连接的请求后退出,就仅由新的工作进程来处理输入的请求了
老的worker已经没了,但是老的master还有,是准备回滚使用的
查看当前nginx状态
[root@localhost ~]# /usr/local/nginx/sbin/nginx -V
nginx version: nginx/1.12.2
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=nginx --group=nginx --with-http_stub_status_module --with-http_ssl_module --with-pcre
如果在版本升级完成后,没有任何问题,需要关闭老的master进程.
5.回滚
老的master进程是一直存在,在没有手工关闭前,它是不会自已关闭的,这种设计是有好处的,好处就是为了升级新版本后,如果出现问题能及时快速的回滚到上一个稳定版本。
[root@localhost ~]# ps aux | grep nginx
root 12264 0.0 0.0 24860 956 ? Ss 16:31 0:00 nginx: master process /usr/local/nginx/sbin/nginx
root 20083 0.0 0.1 45936 3260 ? S 16:38 0:00 nginx: master process /usr/local/nginx/sbin/nginx
nginx 20084 0.0 0.1 46384 2128 ? S 16:38 0:00 nginx: worker process
root 27488 0.0 0.0 112708 984 pts/0 R+ 16:47 0:00 grep --color=auto nginx
[root@localhost ~]# kill -HUP 12264 #发送 HUP 信号给旧的主进程 - 它将在不重载配置文件的情况下启动它的工作进程
[root@localhost ~]# ps aux | grep nginx
root 12264 0.0 0.0 24860 956 ? Ss 16:31 0:00 nginx: master process /usr/local/nginx/sbin/nginx
root 20083 0.0 0.1 45936 3260 ? S 16:38 0:00 nginx: master process /usr/local/nginx/sbin/nginx
nginx 20084 0.0 0.1 46384 2128 ? S 16:38 0:00 nginx: worker process
nginx 28108 0.0 0.0 25284 1460 ? S 16:47 0:00 nginx: worker process
root 28154 0.0 0.0 112708 980 pts/0 R+ 16:47 0:00 grep --color=auto nginx
[root@localhost ~]# kill -QUIT 20083 #发送 QUIT 信号给新的主进程,要求其从容关闭其工作进程
[root@localhost ~]# ps aux | grep nginx
root 12264 0.0 0.0 24860 956 ? Ss 16:31 0:00 nginx: master process /usr/local/nginx/sbin/nginx
nginx 28108 0.0 0.0 25284 1460 ? S 16:47 0:00 nginx: worker process
root 28933 0.0 0.0 112708 984 pts/0 R+ 16:48 0:00 grep --color=auto nginx
如果新主进程还没退出,发送 TERM 信号给新的主进程,迫使其退出
kill -TERM 20083
如果因为某些原因新的工作进程不能退出,向其发送 KILL 信号
kill -9 20083
新的主进程退出后,旧的主进程会由移除 .oldbin 后缀,恢复为它的 .pid 文件,这样,一切就都恢复到升级之前了。
[root@localhost ~]# ls /usr/local/nginx/logs/
access.log error.log nginx.pid
[root@localhost ~]# cat /usr/local/nginx/logs/nginx.pid
12264
如果尝试升级成功,而你也希望保留新的服务器时,发送 QUIT 信号给旧的主进程使其退出而只留下新的服务器运行:
kill -QUIT 12264
参考:
https://blog.csdn.net/mingongge/article/details/88097055
https://blog.csdn.net/u011085172/article/details/71515745
Nginx重新编译添加新的模块
https://www.jianshu.com/p/0309cb5e7e76
https://www.jianshu.com/p/695af00ee857