nginx平滑升级(从1.14.2至1.16.0)

1.开始之前首先查看当前的使用版本以及编译时的参数：
#/usr/local/nginx/sbin/nginx -V
nginx version: nginx/1.14.2
built by gcc 4.4.7 20120313 (Red Hat 4.4.7-23) (GCC)
built with OpenSSL 1.0.1e-fips 11 Feb 2013
TLS SNI support enabled
configure arguments: --prefix=/usr/local/nginx --user=www --group=www --with-http_stub_status_module --with-http_ssl_module --with-http_v2_module --with-http_flv_module --with-http_mp4_module --with-http_gzip_static_module --with-http_sub_module --with-stream --with-stream_ssl_module --http-client-body-temp-path=/var/tmp/nginx/client_body_temp/ --http-proxy-temp-path=/var/tmp/nginx/proxy_temp/ --http-fastcgi-temp-path=/var/tmp/nginx/fcgi_temp/ --http-uwsgi-temp-path=/var/tmp/nginx/uwsgi_temp/ --http-scgi-temp-path=/var/tmp/nginx/scgi_temp/ --with-openssl= --with-pcre
将编译参数复制出来，编译新版本的时候会用到。
2.下载新版本并编译
#tar -zxvf nginx-1.16.0.tar.gz -C /usr/local/src
#cd /usr/local/src/nginx-1.16.0
#./configure --prefix=/usr/local/nginx --user=www --group=www --with-http_stub_status_module --with-http_ssl_module --with-http_v2_module --with-http_flv_module --with-http_mp4_module --with-http_gzip_static_module --with-http_sub_module --with-stream --with-stream_ssl_module --http-client-body-temp-path=/var/tmp/nginx/client_body_temp/ --http-proxy-temp-path=/var/tmp/nginx/proxy_temp/ --http-fastcgi-temp-path=/var/tmp/nginx/fcgi_temp/ --http-uwsgi-temp-path=/var/tmp/nginx/uwsgi_temp/ --http-scgi-temp-path=/var/tmp/nginx/scgi_temp/ --with-openssl= --with-pcre
#make (不要执行make install)
3.备份原来的二进制启动文件，然后将新版的启动文件拷贝到/usr/local/nginx/sbin中

mv /usr/local/nginx/sbin/nginx /usr/local/nginx/sbin/nginx.bak

#cp /usr/local/src/nginx-1.16.0/objs/nginx /usr/local/nginx/sbin/nginx
4.测试一下复制过来的文件是否生效
#/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
5.发送USR2信号给nginx master 进程（nginx服务接收到USR2信号后，首先会将旧的nginx.pid文件添加后缀.oldbin，变为nginx.pid.oldbin,然后执行新版本的二进制文件启动服务，如果新的服务启动成功，系统中将有新旧两个Nginx服务共同提供web服务）
#kill -USR2 `cat /var/run/nginx.pid`
ps -ef | grep nginx
root 1844 1 0 May30 ? 00:00:00 nginx: master process /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
www 1846 1844 0 May30 ? 00:00:00 nginx: worker process
www 1847 1844 0 May30 ? 00:00:00 nginx: worker process
root 6304 1844 0 15:30 ? 00:00:00 nginx: master process /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
www 6305 6304 0 15:30 ? 00:00:00 nginx: worker process
www 6306 6304 0 15:30 ? 00:00:00 nginx: worker process
root 6308 3280 0 15:31 pts/0 00:00:00 grep nginx

ls /var/run/ -l |grep nginx

-rw-r–r--. 1 root root 5 May 31 15:30 nginx.pid
-rw-r–r--. 1 root root 5 May 30 15:00 nginx.pid.oldbin
6.通过发送WINCH信号（平缓停止worker process）和QUIT信号（平缓停止Nginx服务）停止旧的Nginx服务进程
#kill -WINCH `cat /var/run/nginx.pid.oldbin`
#kill -QUIT `cat /var/run/nginx.pid.oldbin`
7.升级完成，最后看一下nginx版本
#/usr/local/nginx/sbin/nginx -v
nginx version: nginx/1.16.0