DB Discovery

Definition

CREATE DB_DISCOVERY RULE databaseDiscoveryRuleDefinition [, databaseDiscoveryRuleDefinition] ...

ALTER DB_DISCOVERY RULE databaseDiscoveryRuleDefinition [, databaseDiscoveryRuleDefinition] ...

DROP DB_DISCOVERY RULE ruleName [, ruleName] ...

databaseDiscoveryRuleDefinition:
    ruleName(resources, discoveryTypeDefinition)

resources:
    RESOURCES(resourceName [, resourceName] ...)

discoveryTypeDefinition:
    TYPE(NAME=discoveryType [, PROPERTIES([algorithmProperties] )] )

algorithmProperties:
    algorithmProperty [, algorithmProperty] ...

algorithmProperty:
    key=value
  • discoveryType specifies the database discovery service type, ShardingSphere has built-in support for MGR
  • Duplicate ruleName will not be created

Example

CREATE DB_DISCOVERY RULE ha_group_0 (
RESOURCES(resource_0,resource_1),
TYPE(NAME=mgr,PROPERTIES(groupName='92504d5b-6dec',keepAliveCron=''))
);

ALTER DB_DISCOVERY RULE ha_group_0 (
RESOURCES(resource_0,resource_1,resource_2),
TYPE(NAME=mgr,PROPERTIES(groupName='92504d5b-6dec' ,keepAliveCron=''))
);

DROP DB_DISCOVERY RULE ha_group_0;