zabbix版本升级，3.4升级到4.0

1、备份数据库
mysqldump -uzabbix -ppassword --opt --skip-lock-tables --database zabbix | gzip > zabbix_`date +'%Y%m%d%H%M%S'`.sql.gz

2、停止服务
systemctl stop zabbix-server.service
systemctl stop zabbix-agent.service
systemctl stop httpd 

3、备份zabbix文件
mkdir /backup/zabbix-backup
cp /etc/zabbix/zabbix_server.conf /backup/zabbix-backup/
cp /etc/httpd/conf.d/zabbix.conf  /backup/zabbix-backup/
cp -R /usr/share/zabbix/ /backup/zabbix-backup/
cp -R /usr/share/doc/zabbix-* /backup/zabbix-backup/

4、升级rpm包
rpm -Uvh zabbix-release-4.0-1.el7.noarch.rpm
rpm -Uvh zabbix-server-mysql-4.0.0-2.el7.x86_64.rpm
rpm -Uvh zabbix-sender-4.0.0-2.el7.x86_64.rpm
rpm -Uvh zabbix-java-gateway-4.0.0-2.el7.x86_64.rpm
rpm -Uvh zabbix-agent-4.0.0-2.el7.x86_64.rpm
rpm -Uvh zabbix-web-mysql-4.0.0-2.el7.noarch.rpm zabbix-web-4.0.0-2.el7.noarch.rpm

5、启动服务
systemctl start zabbix-server.service
systemctl start zabbix-agent.service
systemctl start httpd 

6、查看日志
tail -f /var/log/zabbix/zabbix_server.log