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数据库发现

数据库发现 #

语法说明 #

CREATE DB_DISCOVERY RULE ruleDefinition [, ruleDefinition] ...

ALTER DB_DISCOVERY RULE ruleDefinition [, ruleDefinition] ...

DROP DB_DISCOVERY RULE ruleName [, ruleName] ...

DROP DB_DISCOVERY TYPE discoveryTypeName [, discoveryTypeName] ...

DROP DB_DISCOVERY HEARTBEAT discoveryHeartbeatName [, discoveryHeartbeatName] ...

ruleDefinition:
    ruleName (storageUnits, typeDefinition, heartbeatDefinition)

storageUnits:
    STORAGE_UNITS(storageUnitName [, storageUnitName] ...)

typeDefinition:
    TYPE(NAME=typeName [, PROPERTIES([properties] )] )

heartbeatDefinition
    HEARTBEAT (PROPERTIES (properties)) 

properties:
    property [, property] ...

property:
    key=value

参数解释 #

名称数据类型说明
discoveryTypeNameIDENTIFIER数据库发现类型名
ruleNameIDENTIFIER规则名称
discoveryHeartbeatNameIDENTIFIER监听心跳名称
typeNameSTRING数据库发现类型，如：MySQL.MGR、MySQL.NORMAL_REPLICATION、openGauss.NORMAL_REPLICATION、SphereEx:GaussDB_for_MySQL.NORMAL_REPLICATION、SphereEx:PostgreSQL.NORMAL_REPLICATION
storageUnitNameIDENTIFIER资源名称

注意事项 #

  • discoveryType 指定数据库发现服务类型，DBPlusEngine 内置支持 MySQL.NORMAL_REPLICATION、MySQL.MGR、openGauss.NORMAL_REPLICATION、SphereEx:GaussDB_for_MySQL.NORMAL_REPLICATION、SphereEx:PostgreSQL.NORMAL_REPLICATION ;
  • 重复的 ruleName 将无法被创建；
  • 正在被使用的 discoveryType 和 discoveryHeartbeat 无法被删除；
  • 带有 - 的命名在改动时需要使用 " "；
  • 移除 discoveryRule 时不会移除被该 discoveryRule 使用的 discoveryType 和 discoveryHeartbeat。

示例 #

创建 discoveryRule 时同时创建 discoveryType 和 discoveryHeartbeat #

CREATE DB_DISCOVERY RULE db_discovery_group_0 (
STORAGE_UNITS(ds_0, ds_1, ds_2),
TYPE(NAME='MySQL.MGR',PROPERTIES('group-name'='92504d5b-6dec')),
HEARTBEAT(PROPERTIES('keep-alive-cron'='0/5 * * * * ?'))
);

ALTER DB_DISCOVERY RULE db_discovery_group_0 (
STORAGE_UNITS(ds_0, ds_1, ds_2),
TYPE(NAME='MySQL.MGR',PROPERTIES('group-name'='246e9612-aaf1')),
HEARTBEAT(PROPERTIES('keep-alive-cron'='0/5 * * * * ?'))
);

DROP DB_DISCOVERY RULE db_discovery_group_0;

DROP DB_DISCOVERY TYPE db_discovery_group_0_mgr;

DROP DB_DISCOVERY HEARTBEAT db_discovery_group_0_heartbeat;