一、nginx平滑升级

• USR2
  启动新版本进程

• WINCH
  平缓关闭旧工作进程

1、下载新版本的安装包

[root@localhost ~]# wget http://nginx.org/download/nginx-1.26.0.tar.gz 

2、以之前的安装参数来编译新版本软件

[root@localhost ~]# /usr/local/nginx/sbin/nginx -V
nginx version: nginx/1.20.2
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-44) (GCC) 
built with OpenSSL 1.0.2k-fips  26 Jan 2017
TLS SNI support enabled
configure arguments: --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module

[root@localhost ~]# tar xf nginx-1.26.0.tar.gz 
[root@localhost ~]# cd nginx-1.26.0/
[root@localhost nginx-1.26.0]# ./configure --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module
[root@localhost nginx-1.26.0]# make
---------------不要make install--------------------------------[root@localhost nginx-1.26.0]# ls objs/
autoconf.err  Makefile  nginx  nginx.8  ngx_auto_config.h  ngx_auto_headers.h  ngx_modules.c  ngx_modules.o  src[root@localhost nginx-1.26.0]# objs/nginx -v
nginx version: nginx/1.26.0

3、将新版本的nginx拷贝到安装目录

[root@localhost nginx-1.26.0]# mv /usr/local/nginx/sbin/nginx /usr/local/nginx/sbin/nginx.bak
[root@localhost nginx-1.26.0]# 
[root@localhost nginx-1.26.0]# cp objs/nginx /usr/local/nginx/sbin/
[root@localhost nginx-1.26.0]# ls /usr/local/nginx/sbin/
nginx  nginx.bak  

4、启动新版本进程

[root@localhost sbin]# kill -USR2 $(cat /usr/local/nginx/logs/nginx.pid)
[root@localhost sbin]# 
[root@localhost sbin]# ps -elf | grep nginx
1 S root       1565      1  0  80   0 - 11509 sigsus 09:17 ?        00:00:00 nginx: master process /usr/local/nginx/sbin/nginx
5 S nobody     3636   1565  0  80   0 - 11621 ep_pol 11:46 ?        00:00:00 nginx: worker process
0 S root       6508   1565  0  80   0 - 11505 sigsus 15:22 ?        00:00:00 nginx: master process /usr/local/nginx/sbin/nginx
5 S nobody     6509   6508  0  80   0 - 11619 ep_pol 15:22 ?        00:00:00 nginx: worker process
0 R root       6513   1516  0  80   0 - 28203 -      15:23 pts/0    00:00:00 grep --color=auto nginx
[root@localhost sbin]# [root@localhost sbin]# cat /usr/local/nginx/logs/nginx.pid
6508
[root@localhost sbin]# cat /usr/local/nginx/logs/nginx.pid.oldbin 
1565

5、平缓关闭旧工作进程

[root@localhost sbin]# kill -WINCH $(cat /usr/local/nginx/logs/nginx.pid.oldbin)
[root@localhost sbin]# 
[root@localhost sbin]# ps -elf | grep nginx
1 S root       1565      1  0  80   0 - 11509 sigsus 09:17 ?        00:00:00 nginx: master process /usr/local/nginx/sbin/nginx
0 S root       6508   1565  0  80   0 - 11505 sigsus 15:22 ?        00:00:00 nginx: master process /usr/local/nginx/sbin/nginx
5 S nobody     6509   6508  0  80   0 - 11619 ep_pol 15:22 ?        00:00:00 nginx: worker process
0 R root       6549   1516  0  80   0 - 28203 -      15:27 pts/0    00:00:00 grep --color=auto nginx
[root@localhost sbin]# 

6、清理旧版本的nginx

[root@localhost sbin]# kill 1565
[root@localhost sbin]# ls
nginx  nginx.bak
[root@localhost sbin]# rm -rf nginx.bak