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## 1.11 自定义告警模块
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- + [ 告警工作原理] ( #1111-%E5%B7%A5%E4%BD%9C%E5%8E%9F%E7%90%86 )
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- - [ 告警模块的加载] ( #11111-%E5%91%8A%E8%AD%A6%E6%A8%A1%E5%9D%97%E7%9A%84%E5%8A%A0%E8%BD%BD )
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- - [ 告警发送和解除] ( #11112-%E5%91%8A%E8%AD%A6%E5%8F%91%E9%80%81%E5%92%8C%E8%A7%A3%E9%99%A4 )
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- - [ 告警Interface Alert详解] ( #11113-%E5%91%8A%E8%AD%A6interface-alert%E8%AF%A6%E8%A7%A3 )
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- - [ 告警发送对象详解] ( #11114-%E5%91%8A%E8%AD%A6%E5%8F%91%E9%80%81%E5%AF%B9%E8%B1%A1%E8%AF%A6%E8%A7%A3 )
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- + [ 自定义告警的开发和部署] ( #1112-%E8%87%AA%E5%AE%9A%E4%B9%89%E5%91%8A%E8%AD%A6%E7%9A%84%E5%BC%80%E5%8F%91%E5%92%8C%E9%83%A8%E7%BD%B2 )
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- - [ 自定义告警的开发] ( #11121-%E8%87%AA%E5%AE%9A%E4%B9%89%E5%91%8A%E8%AD%A6%E7%9A%84%E5%BC%80%E5%8F%91 )
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- - [ 自定义告警的使用] ( #11122-%E8%87%AA%E5%AE%9A%E4%B9%89%E5%91%8A%E8%AD%A6%E7%9A%84%E4%BD%BF%E7%94%A8 )
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- - [ 自定义告警示例以及示例文件] ( #11123-%E8%87%AA%E5%AE%9A%E4%B9%89%E5%91%8A%E8%AD%A6%E7%A4%BA%E4%BE%8B%E4%BB%A5%E5%8F%8A%E7%A4%BA%E4%BE%8B%E6%96%87%E4%BB%B6 )
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- + [ 第三方自定义告警项目示例] ( https://github.com/LuYongwang/dble-alram-webhook )
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### 1.11.1 工作原理
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#### 1.11.1.1 告警模块的加载
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![ 告警模块工作原理] ( pic/alert.png )
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## 自定义全局表检查
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- + [ 全局表一致性检查逻辑] ( #%E5%B7%A5%E4%BD%9C%E5%8E%9F%E7%90%86%E5%A4%A7%E8%87%B4%E9%80%BB%E8%BE%91 )
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- + [ 全局表自定义方法详述] ( #%E5%85%A8%E5%B1%80%E8%A1%A8%E6%A3%80%E6%9F%A5%E6%96%B9%E6%B3%95%E8%AF%A6%E8%A7%A3 )
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- - [ getCountSQL] ( #1%E6%89%A7%E8%A1%8Csql%E5%AE%9A%E4%B9%89string-getcountsqlstring-dbname-string-tname )
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- - [ getFetchCols] ( #2%E7%BB%93%E6%9E%9C%E9%9B%86%E5%AE%9A%E4%B9%89-getfetchcols )
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- - [ resultEquals] ( #3sql%E7%BB%93%E6%9E%9C%E6%AF%94%E8%BE%83%E6%96%B9%E6%B3%95-boolean-resultequalsresult1result2 )
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- - [ failResponse] ( #4%E5%A4%B1%E8%B4%A5%E8%A1%8C%E4%B8%BA%E6%8E%A5%E5%8F%A3-failresponseresultlist )
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- - [ resultResponse] ( #5%E5%85%B6%E4%BB%96%E7%BB%93%E6%9E%9C%E9%80%9A%E7%9F%A5-void-resultresponseerrorlist )
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- + [ 自定义全局表检查操作步骤] ( #%E6%A3%80%E6%9F%A5%E7%9A%84%E8%87%AA%E5%AE%9A%E4%B9%89%E6%AD%A5%E9%AA%A4 )
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- + [ 自定义全局表检查配置] ( #%E8%87%AA%E5%AE%9A%E4%B9%89%E6%A3%80%E6%9F%A5%E7%9A%84%E9%85%8D%E7%BD%AE )
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### 背景
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** 全局表** 是dble中一种特殊类型的表格,一般来说认为在一个全局表table_a所有分布的节点上,table_a因同时满足以下两个条件:
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+ 拥有相同的表格结构
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行描述:
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```
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- INDEX:reload对应的编号,能与日志中的[RL] 日志编号相对应
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+ INDEX:reload对应的编号,能与日志中的“RL” 日志编号相对应
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CLUSTER:当前dble使用的集群方式
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RELOAD_TYPE:最近的reload的类型 RELOAD_ALL/RELOAD_META/MANAGER_INSERT/MANAGER_UPDATE/MANAGER_DELETE
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RELOAD_STATUS:最近一次reload的执行状状态not_reloading/self_reload/meta_reload/waiting_others
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