Nginx 平滑升级至 OpenResty
Nginx 平滑升级
- nginx路径：/usr/local/nginx
升级前：nginx 1.4.4
升级后：openresty 1.15.8.3
升级步骤
1. 下载openresty
wget https://openresty.org/download/openresty-1.15.8.3.tar.gz
tar -xzvf openresty-1.15.8.3.tar.gz
2. 编译安装openresty
cd /downloads/openresty-1.15.8.3
./configure --prefix=/usr/local/
gmake
gmake install
3. 平滑迁移Nginx
- 检查nginx二进制文件和
nginx.pid的位置
[root@test_192.168.1.83 /downloads/openresty-1.15.8.3]# cd /usr/local/nginx/sbin/
[root@test_192.168.1.83 /usr/local/nginx/sbin]# ll
total 20952
-rwxr-xr-x 1 root root 16303050 Aug 11 20:28 nginx
-rwxr-xr-x 1 root root 5147818 Aug 11 20:01 nginx.old
[root@test_192.168.1.83 /usr/local/nginx/sbin]#
原来应该手动执行以下2步，但是openresty帮我们执行完了，这里就不用手动执行了
- 备份旧的nginx文件
cp nginx nginx.old
- 复制新的nginx文件到/usr/local/nginx/sbin中
cd /downloads/openresty-1.15.8.3/build/nginx-1.15.8/
cp -rfp objs/nginx /usr/local/nginx/sbin/
- 执行信号
kill -USR2 ${nginx_master_pid}平滑升级
[root@test_192.168.1.83 /usr/local/nginx]# ps -ef | grep nginx
root 30069 1 0 20:27 ? 00:00:00 nginx: master process ./nginx
www 30070 30069 0 20:27 ? 00:00:00 nginx: worker process
www 30071 30069 0 20:27 ? 00:00:00 nginx: worker process
www 30072 30069 0 20:27 ? 00:00:00 nginx: worker process
www 30073 30069 0 20:27 ? 00:00:00 nginx: worker process
www 30074 30069 0 20:27 ? 00:00:00 nginx: worker process
www 30075 30069 0 20:27 ? 00:00:00 nginx: worker process
www 30076 30069 0 20:27 ? 00:00:00 nginx: worker process
www 30077 30069 0 20:27 ? 00:00:00 nginx: worker process
root 30735 8315 0 20:29 pts/0 00:00:00 grep nginx
[root@test_192.168.1.83 /usr/local/nginx]# kill -USR2 30069
可以看到，启动了一个新的nginx_master进程以及相应的worker进程。
[root@test_192.168.1.83 /usr/local/nginx]# ps -ef | grep nginx
root 30069 1 0 20:27 ? 00:00:00 nginx: master process ./nginx
www 30070 30069 0 20:27 ? 00:00:00 nginx: worker process
www 30071 30069 0 20:27 ? 00:00:00 nginx: worker process
www 30072 30069 0 20:27 ? 00:00:00 nginx: worker process
www 30073 30069 0 20:27 ? 00:00:00 nginx: worker process
www 30074 30069 0 20:27 ? 00:00:00 nginx: worker process
www 30075 30069 0 20:27 ? 00:00:00 nginx: worker process
www 30076 30069 0 20:27 ? 00:00:00 nginx: worker process
www 30077 30069 0 20:27 ? 00:00:00 nginx: worker process
root 30761 30069 1 20:29 ? 00:00:00 nginx: master process ./nginx
www 30762 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30763 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30764 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30765 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30766 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30767 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30768 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30769 30761 0 20:29 ? 00:00:00 nginx: worker process
root 30771 8315 0 20:29 pts/0 00:00:00 grep nginx
还可以看到，旧的nginx.pid文件被修改为了nginx.pid.oldbin，同时生成了一个新的nginx.pid文件用来记录新的nginx master进程的pid。
[root@test_192.168.1.83 /usr/local/nginx]# ll
total 44
drwx------ 2 www root 4096 Aug 11 15:29 client_body_temp
drwxr-xr-x 3 root root 4096 Aug 4 21:42 conf
drwx------ 12 www root 4096 Jun 20 2017 fastcgi_temp
drwxr-xr-x 2 root root 4096 Nov 5 2015 html
drwxr-xr-x 2 root root 4096 Jul 28 13:53 logs
-rw-r--r-- 1 root root 6 Aug 11 20:29 nginx.pid
-rw-r--r-- 1 root root 6 Aug 11 20:27 nginx.pid.oldbin
drwx------ 12 www root 4096 Mar 28 2018 proxy_temp
drwxr-xr-x 2 root root 4096 Aug 11 20:28 sbin
drwx------ 2 www root 4096 Nov 5 2015 scgi_temp
drwx------ 2 www root 4096 Nov 5 2015 uwsgi_temp
- 执行
kill -WINCH ${nginx_master_pid}结束工作进程
[root@test_192.168.1.83 /usr/local/nginx]# kill -WINCH 30069
[root@test_192.168.1.83 /usr/local/nginx]# ps -ef | grep nginx
root 30069 1 0 20:27 ? 00:00:00 nginx: master process ./nginx
root 30761 30069 0 20:29 ? 00:00:00 nginx: master process ./nginx
www 30762 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30763 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30764 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30765 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30766 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30767 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30768 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30769 30761 0 20:29 ? 00:00:00 nginx: worker process
可以看到，旧的worker进程已经优雅结束了（不再接收新的请求，处理完当前请求后自动结束，或者在等待了max_requests_timeout之后强行结束）
此时旧的master进程id还在，可以通过kill -HUP ${nginx_master_pid}重新拉起旧的nginx
如果不想回滚，可以执行 kill -QUIT ${nginx_master_pid} 优雅结束master进程
[root@test_192.168.1.83 /usr/local/nginx]# ps -ef | grep nginx
root 5185 8315 0 21:11 pts/0 00:00:00 grep nginx
root 30069 1 0 20:27 ? 00:00:00 nginx: master process ./nginx
root 30761 30069 0 20:29 ? 00:00:00 nginx: master process ./nginx
www 30762 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30763 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30764 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30765 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30766 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30767 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30768 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30769 30761 0 20:29 ? 00:00:00 nginx: worker process
[root@test_192.168.1.83 /usr/local/nginx]# kill -QUIT 30069
[root@test_192.168.1.83 /usr/local/nginx]# ps -ef | grep nginx
root 5212 8315 0 21:11 pts/0 00:00:00 grep nginx
root 30761 1 0 20:29 ? 00:00:00 nginx: master process ./nginx
www 30762 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30763 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30764 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30765 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30766 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30767 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30768 30761 0 20:29 ? 00:00:00 nginx: worker process
www 30769 30761 0 20:29 ? 00:00:00 nginx: worker process
[root@test_192.168.1.83 /usr/local/nginx]#
可以看到旧的master进程已经消失了，新的master进程父进程id变为了1
- 查看nginx版本，验证是否升级成功
[root@test_192.168.1.83 /usr/local/nginx/sbin]# ./nginx -v
nginx version: openresty/1.15.8.3
[root@test_192.168.1.83 /usr/local/nginx/sbin]#
可以看到已经升级至 nginx 1.15.8.3
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