zabbix connection to database 'zabbix' failed

yun

在启动zabbix时启动失败，查看日志：

1. [root@localhost zabbix]# tailf /tmp/zabbix_server.log  
   
2. 24661:20180326:203250.916 [Z3001] connection to database 'zabbix' failed: [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)  
   
3. 24661:20180326:203250.916 database is down: reconnecting in 10 seconds  
   
4. 24661:20180326:203300.916 [Z3001] connection to database 'zabbix' failed: [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)  
   
5. 24661:20180326:203300.916 database is down: reconnecting in 10 seconds  
   
6. 24661:20180326:203310.917 [Z3001] connection to database 'zabbix' failed: [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)  
   
7. 24661:20180326:203310.917 database is down: reconnecting in 10 seconds  
   
8. 24661:20180326:203320.918 [Z3001] connection to database 'zabbix' failed: [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)  
   
9. 24661:20180326:203320.918 database is down: reconnecting in 10 seconds  
   
10. 24661:20180326:203330.920 [Z3001] connection to database 'zabbix' failed: [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)  
    
11. 24661:20180326:203330.920 database is down: reconnecting in 10 seconds  

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发现日志链接不上
[root@localhost zabbix]# ll /var/lib/mysql/mysql.sock  
ls: cannot access /var/lib/mysql/mysql.sock: No such file or directory  
[root@localhost zabbix]# ll /var/lib/mysql  
ls: cannot access /var/lib/mysql: No such file or directory  

可以知道是/var/lib/mysql/mysql.sock不存在
在系统中查找mysql.sock文件：

1. [root@localhost zabbix]# find / -name mysql.sock  
   
2. /tmp/mysql.sock  

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可以知道是在/tmp/下，这个时候有两种方式解决这个问题：
1）做mysql.sock的链接

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

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2)修改zabbix_server.conf中的mysql.sock的配置

1. vim /etc/zabbix/zabbix_server.conf  
   
2. DBSocket=/tmp/mysql.sock

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再重启zabbix就好