学习nginx热部署实战

学习nginx热部署实战

检查当前安装的nginx版本

[root@gujipeng ~]# nginx -v
nginx version: nginx/1.18.0

备份旧的二进制命令
修改当前的nginx

[root@gujipeng ~]# cd /opt/nginx-1.18sbin/
[root@gujipeng sbin]# mv nginx nginx.1.18

检查旧的二进制命令编译参数

[root@gujipeng sbin]# nginx.1.18 -V
nginx version: nginx/1.18.0
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-39) (GCC) 
built with OpenSSL 1.0.2k-fips  26 Jan 2017
TLS SNI support enabled
configure arguments: --prefix=/opt/nginx-1.18 --with-http_ssl_module --with-http_flv_module --with-http_gzip_static_module --with-http_stub_status_module --with-threads --with-file-aio

准备一个新的nginx程序版本，编译安装
http://nginx.org/download/nginx-1.16.1.tar.gz

[root@gujipeng opt]# wget http://nginx.org/download/nginx-1.16.1.tar.gz
[root@gujipeng opt]# tar -zxvf nginx-1.16.1.tar.gz
[root@gujipeng opt]# cd nginx-1.16.1
[root@gujipeng nginx-1.16.1]# ./configure --prefix=/opt/nginx-1.18 --with-http_ssl_module --with-http_flv_module --with-http_gzip_static_module --with-http_stub_status_module --with-threads --with-file-aio
[root@gujipeng nginx-1.16.1]# make 
[root@gujipeng nginx-1.16.1]# make install

检查新版的nginx信息

[root@gujipeng nginx-1.16.1]# cd /opt/nginx-1.18/sbin/
[root@gujipeng sbin]# ls
nginx  nginx.1.18

再次检查当前系统的nginx状态

[root@gujipeng sbin]# ./nginx -v
nginx version: nginx/1.16.1
[root@gujipeng sbin]# ./nginx.1.18 -v
nginx version: nginx/1.18.0
[root@gujipeng sbin]# ps -ef |grep nginx
root     20311     1  0 15:12 ?        00:00:00 nginx: master process nginx
nobody   20312 20311  0 15:12 ?        00:00:00 nginx: worker process
root     20314 13589  0 15:12 pts/0    00:00:00 grep --color=auto nginx

发送一个USR2信号给旧的master process，使得nginx旧的版本停止接收用户请求，并且切换为新的nginx版本

[root@gujipeng sbin]# kill -USR2 'cat /opt/nginx-1.18/logs/nginx.pid '

[root@gujipeng sbin]# ps -ef |grep nginx
root     20311     1  0 15:12 ?        00:00:00 nginx: master process nginx
nobody   20312 20311  0 15:12 ?        00:00:00 nginx: worker process
root     20335 20311  0 15:13 ?        00:00:00 nginx: master process nginx
nobody   20336 20335  0 15:13 ?        00:00:00 nginx: worker process
root     20338 13589  0 15:13 pts/0    00:00:00 grep --color=auto nginx

[root@gujipeng sbin]# ls ../logs/
access.log        error.log         nginx.pid         nginx.pid.oldbin

发送WINCH信号，给旧的master进程，让旧的master进程优雅的退出

[root@gujipeng sbin]# kil -WINCH 'cat /opt/nginx-1.18/logs/nginx.pid.oldbin'

再次检查进程情况，旧master的worker已经关闭了，旧master不会自己退出，用作版本回退

[root@gujipeng sbin]# ps -ef|grep nginx
root     20311     1  0 15:12 ?        00:00:00 nginx: master process nginx
root     20335 20311  0 15:13 ?        00:00:00 nginx: master process nginx
nobody   20336 20335  0 15:13 ?        00:00:00 nginx: worker process
root     20607 13589  0 15:25 pts/0    00:00:00 grep --color=auto nginx

新的nginx服务一切正常，干掉旧的master主进程

[root@gujipeng sbin]# kill 20311
[root@gujipeng sbin]# ps -ef|grep nginx
root     20335     1  0 15:13 ?        00:00:00 nginx: master process nginx
nobody   20336 20335  0 15:13 ?        00:00:00 nginx: worker process
root     20665 13589  0 15:28 pts/0    00:00:00 grep --color=auto nginx

nginx版本热部署，热跟换实验结束