connection to database 'zabbix' failed: [2002] Can't connect to local MySQL server through socket '/tmp/mysql.sock' (111)

根据提供的引用内容，你遇到的问题是连接到数据库失败，错误信息是"Can't connect to local MySQL server through socket '/tmp/mysql.sock' (111)"。这个问题可能由于以下原因导致：

1. MySQL服务器没有正常运行。你需要确保MySQL服务器已经启动。你可以通过运行命令 "service mysql status" 或者 "systemctl status mysql" 来检查MySQL服务器的状态。如果MySQL服务器没有运行，你可以使用命令 "service mysql start" 或者 "systemctl start mysql" 来启动它。

2. MySQL服务器的socket文件路径不正确。在引用和提到的错误信息中，socket文件的路径被指定为 '/var/lib/mysql/mysql.sock' 或者 '/tmp/mysql.sock'。你需要确保这个路径与实际的socket文件路径相匹配。你可以通过运行命令 "ls -l /var/lib/mysql/mysql.sock" 或者 "ls -l /tmp/mysql.sock" 来查找正确的路径。如果路径不正确，你可以使用命令 "ln -s <正确的路径> /tmp/mysql.sock" 来创建正确的软链接。

3. 防火墙或网络配置导致无法连接到MySQL服务器。你需要确保你的防火墙允许从Zabbix服务器连接到MySQL服务器的端口（默认是3306）。你还需要确保网络配置正确，允许Zabbix服务器与MySQL服务器进行通信。

请根据上述建议检查和调整相关设置，以解决连接到数据库失败的问题。希望这能帮到你。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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