zabbix-HA

Zabbix Server HA 使用keepalived构建Zabbix-Server的HA功能，作为《Zabbix企业级分布式监控系统》书籍内容的补充

1.系统环境

• CentOS 7 X64
• rpm安装的zabbix_server，非官方安装包请修改脚本对应文件路径即可使用
• pidof arping 命令存在
• root用户执行以下操作

IP地址	角色	机器名
192.168.0.3	MASTER	NODE1
192.168.0.4	BACKUP	NODE2
192.168.0.5	VIP	存在于MASTER机器之上

2.安装keepalived

分别在主机MASTER和BACKUP安装keepalived

yum install -y keepalived
systemctl keepalived enable

3. 配置MASTER

wget https://raw.githubusercontent.com/zabbix-book/zabbix-HA/master/keepalived.conf-master
mv keepalived.conf-master /etc/keepalived.conf

mkdir -p /etc/keepalived/
cd /etc/keepalived/
wget https://raw.githubusercontent.com/zabbix-book/zabbix-HA/master/ha_switch.sh
chmod 755 /etc/keepalived/ha_switch.sh

• 修改/etc/keepalived.conf配置文件

  virtual_ipaddress {
        192.168.0.5  #VIP地址
    }

• 修改脚本ha_switch.sh

VIP="192.168.0.5"  #VIP

4. 配置BACKUP

wget https://raw.githubusercontent.com/zabbix-book/zabbix-HA/master/keepalived.conf-backup
mv keepalived.conf-master /etc/keepalived.conf

mkdir -p /etc/keepalived/
cd /etc/keepalived/
wget https://raw.githubusercontent.com/zabbix-book/zabbix-HA/master/ha_switch.sh
chmod 755 /etc/keepalived/ha_switch.sh

• 修改/etc/keepalived.conf配置文件

  virtual_ipaddress {
        192.168.0.5  #VIP地址
    }

• 修改脚本ha_switch.sh

VIP="192.168.0.5"  #VIP

5. 启动MASTER keepalived (MASTER机器操作)

在zabbix_server配置就绪后，即zabbix_server.conf配置文件修改完毕，zabbix_server可以在单机环境中正常运行后

• 手动停止zabbix_server

systemctl stop zabbix-server

• 启动keepalived,此操作会在keepalived的MASTER角色自动开启zabbix_server服务

systemctl start keepalived

6. 启动BACKUP keepalived (BACKUP机器操作)

• 手动停止zabbix_server

systemctl stop zabbix-server

• 启动keepalived

systemctl start keepalived

7. 验证

• 分别在MASTER和BACKUP查看zabbix_server进程是否存在

ps -ef |grep zabbix_server

• 将MASTER上的zabbix_server手动停止

systemctl stop zabbix-server

• 将会看到keepalived将zabbix_server进程自动拉起

8. 注意事项

由于当前版本的zabbix_server本身并没有设计支持HA工作的方式， 即2个zabbix_server在不同的机器上面工作， 后端连接同一个数据库的情况，故只能采取主备的方式。

如同时将2个zabbix_server启动， 则会造成数据库主键冲突， 以及告警触发2次的问题