zabbix连接不上数据库

zabbix连接不上数据库，查看日志

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[root@localhost zabbix]# tail -f zabbix_server.log 
 28104:20190423:154740.067 server #28 started [alerter #2]
 28080:20190423:154742.054 item "Zabbix server:zabbix[process,ipmi poller,avg,busy]" became not supported: No "ipmi poller" processes started.
 28080:20190423:154742.259 item "Zabbix server:zabbix[process,java poller,avg,busy]" became not supported: No "java poller" processes started.
 28080:20190423:154747.760 item "Zabbix server:zabbix[process,ipmi manager,avg,busy]" became not supported: No "ipmi manager" processes started.
 28080:20190423:154747.760 item "Zabbix server:zabbix[process,snmp trapper,avg,busy]" became not supported: No "snmp trapper" processes started.
 28080:20190423:154748.910 item "Zabbix server:zabbix[process,vmware collector,avg,busy]" became not supported: No "vmware collector" processes started.
 28082:20190423:154755.236 item "Zabbix server:zabbix[vmware,buffer,pused]" became not supported: No "vmware collector" processes started.
 28093:20190423:154758.127 enabling Zabbix agent checks on host "Zabbix server": host became available
 28089:20190423:154800.127 enabling Zabbix agent checks on host "mysql_server": host became available
 28082:20190423:154800.428 item "mysql_server:system.cpu.load[,]" became not supported: Invalid first parameter.

解决办法：

[root@localhost lib]# mkdir /var/lib/mysql
[root@localhost lib]# ln -s /tmp/mysql.sock /var/lib/mysql/mysql.sock
[root@localhost lib]# /etc/rc.d/init.d/mysqld restart
Shutting down MySQL... SUCCESS! 
Starting MySQL SUCCESS! 

[root@localhost zabbix]# tail -f zabbix_server.log 
 28082:20190423:155527.231 [Z3001] connection to database 'zabbix' failed: [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)
 28082:20190423:155527.231 database is down: reconnecting in 10 seconds
 28080:20190423:155533.655 database connection re-established
 28102:20190423:155533.886 database connection re-established
 28088:20190423:155535.165 database connection re-established
 28081:20190423:155535.226 database connection re-established
 28078:20190423:155535.246 database connection re-established
 28084:20190423:155535.379 database connection re-established
 28083:20190423:155536.232 database connection re-established
 28082:20190423:155537.232 database connection re-established

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