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生产环境 Nginx 在线平滑升级

生产环境 Nginx 在线平滑升级

作者: 叨叨软件测试 | 来源:发表于2020-11-28 17:26 被阅读0次

    背景

    生产环境 Nginx 需要增加支持 TCP 反向代理功能,需要再添加--with-stream参数重新编译后,在线升级 Nginx。

    在线升级

    # 查看当前版本(注意为大写 V)
    $ cd /usr/local/nginx/sbin
    $ nginx -V
    nginx version: nginx/1.16.1
    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=/usr/local/nginx --user=nginx --group=nginx --with-http_ssl_module
    
    # 安装编译依赖
    $ yum -y install gcc pcre pcre-devel zlib zlib-devel openssl openssl-devel
    
    # 下载、解压、并编译(仅编译不安装)
    $ wget http://nginx.org/download/nginx-1.16.1.tar.gz
    $ tar -zxvf nginx-1.16.1.tar.gz
    $ cd nginx-1.16.1
    # 增加 --with-stream 编译
    # --pid-path 根据各自情况添加,由于 nginx 执行升级命令时,默认是从 nginx/logs 目录下找 nginx.pid
    $ ./configure --prefix=/usr/local/nginx --user=nginx --group=nginx --with-http_ssl_module --with-stream --pid-path=/usr/local/nginx/nginx.pid
    # -j 指定CPU内核数量,加快编译速度
    $ make -j 4
    
    # 备份旧版本,复制新版本
    $ mv /usr/local/nginx/sbin/nginx /usr/local/nginx/sbin/nginx.old
    $ cp nginx-1.16.1/objs/nginx /usr/local/nginx/sbin/
    $ chown nginx:nginx /usr/local/nginx/sbin/nginx
    
    # 升级前查看进程号,确认进程号与 nginx.pid 一致
    $ ps -ef | grep nginx
    root     11871     1  0 3月24 ?       00:00:00 nginx: master process /usr/local/nginx/sbin/nginx
    nginx    13772 11871  0 11月10 ?      00:00:02 nginx: worker process
    nginx    13773 11871  0 11月10 ?      00:00:03 nginx: worker process
    nginx    13774 11871  0 11月10 ?      00:00:04 nginx: worker process
    nginx    13775 11871  0 11月10 ?      00:00:04 nginx: worker process
    $ cat /usr/local/nginx/nginx.pid
    11871
     
    # 在 nginx1.16.1 目录下,执行 make upgrade 命令自动升级
    $ cd nginx-1.16.1
    $ make upgrade
    # 使用新版本检测配置文件是否正确
    /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
    # 发送平滑迁移信号给旧的 nginx 进程
    kill -USR2 `cat /usr/local/nginx/nginx.pid`
    sleep 1
    # 检测旧的 nginx.pid 进程是否变为 nginx.pid.oldbin
    test -f /usr/local/nginx/nginx.pid.oldbin
    # 结束旧版本的进程,完成升级
    kill -QUIT `cat /usr/local/nginx/nginx.pid.oldbin` 
     
    # 验证是否升级成功,查看 nginx 进程号是否变化(11871-->31845)
    $ ps -ef | grep nginx
    root     31845     1  0 16:58 ?        00:00:00 nginx: master process /usr/local/nginx/sbin/nginx
    nginx    31847 31845  0 16:58 ?        00:00:00 nginx: worker process
    nginx    31848 31845  0 16:58 ?        00:00:00 nginx: worker process
    nginx    31849 31845  0 16:58 ?        00:00:00 nginx: worker process
    nginx    31850 31845  0 16:58 ?        00:00:00 nginx: worker process
    $ cat /usr/local/nginx/nginx.pid
    31845
    
    # 查看升级后的版本(注意为大写 V)
    $ /usr/local/nginx/sbin/nginx -V
    nginx version: nginx/1.16.1
    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=/usr/local/nginx --user=nginx --group=nginx --with-http_ssl_module --with-stream --pid-path=/usr/local/nginx/nginx.pid
    

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