centos7 nginx平滑升级 systemd

mm111222

　　[root@localhost sbin]# ls
　　1.sh  nginx  nginx.0  nginx.2  nginx.3.bak  nginx.lua  nginx.old
　　测试1:
　　cat 1.sh
　　yes|cp -r nginx.0 nginx
　　#service nginx start
　　/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
　　[ -f nginx.old ] && rm -rf nginx.old
　　mv nginx nginx.old
　　yes|cp -r nginx.2 nginx
　　sleep 60
　　kill -USR2 cat /usr/local/nginx/logs/nginx.pid
　　kill -WINCH cat /usr/local/nginx/logs/nginx.pid.oldbin
　　kill -QUIT cat /usr/local/nginx/logs/nginx.pid.oldbin
　　最后剩下
　　[root@localhost nginx]# ps -ef|grep nginx
　　root     30530     1  0 16:08 ?        00:00:00 nginx: master process /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
　　root     30589 30530  0 16:09 ?        00:00:00 nginx: master process /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
　　nginx    30590 30589  0 16:09 ?        00:00:00 nginx: worker process
　　root     30619 30360  0 16:10 pts/6    00:00:00 grep --color=auto nginx
　　[root@localhost nginx]# kill -QUIT cat /usr/local/nginx/logs/nginx.pid.oldbin
　　[root@localhost nginx]# ps -ef|grep nginx
　　root     30589     1  0 16:09 ?        00:00:00 nginx: master process /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
　　nginx    30590 30589  0 16:09 ?        00:00:00 nginx: worker process
　　root     30683 30360  0 16:11 pts/6    00:00:00 grep --color=auto nginx
　　成功
　　测试2:
　　[root@localhost system]# cat nginx.service
　　[Unit]
　　Description=nginx
　　After=network.target
　　[Service]
　　Type=forking
　　ExecStartPre=/usr/local/nginx/sbin/nginx -t -c /usr/local/nginx/conf/nginx.conf
　　ExecStart=/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf

　　ExecReload=/usr/local/nginx/sbin/nginx -s>　　ExecStop=/usr/local/nginx/sbin/nginx -s quit
　　PrivateTmp=true
　　[Install]
　　WantedBy=multi-user.target
　　用systemd forking 方式生成的nginx，使用kill -QUIT cat /usr/local/nginx/logs/nginx.pid.oldbin命令，
　　进程会全部退出
　　ab -n1000000 -c10 http://domain.com/
　　总结，还需要去看下forking是怎么控制进程的?
　　'''
　　strace kill -USR2 cat /usr/local/nginx/logs/nginx.pid
　　sleep 1
　　test -f /usr/local/nginx/logs/nginx.pid.oldbin
　　kill -WINCH cat /usr/local/nginx/logs/nginx.pid.oldbin
　　yes|cp -r nginx.0 nginx
　　service nginx start
　　[ -f nginx.old ] && rm -rf nginx.old
　　mv nginx nginx.old
　　yes|cp -r nginx.2 nginx
　　sleep 1
　　kill -USR2 cat /usr/local/nginx/logs/nginx.pid
　　'''