CREATE DB_DISCOVERY RULE
语法用于创建数据库发现规则
CreateDatabaseDiscoveryRule ::=
'CREATE' 'DB_DISCOVERY' 'RULE' ( databaseDiscoveryDefinition | databaseDiscoveryConstruction ) ( ',' ( databaseDiscoveryDefinition | databaseDiscoveryConstruction ) )*
databaseDiscoveryDefinition ::=
ruleName '(' 'RESOURCES' '(' resourceName ( ',' resourceName )* ')' ',' 'TYPE' '(' 'NAME' '=' typeName ( ',' 'PROPERTIES' 'key' '=' 'value' ( ',' 'key' '=' 'value' )* )? ',' 'HEARTBEAT' '(' 'key' '=' 'value' ( ',' 'key' '=' 'value' )* ')' ')'
databaseDiscoveryConstruction ::=
ruleName '(' 'RESOURCES' '(' resourceName ( ',' resourceName )* ')' ',' 'TYPE' '=' discoveryTypeName ',' 'HEARTBEAT' '=' discoveryHeartbeatName ')'
ruleName ::=
identifier
resourceName ::=
identifier
typeName ::=
identifier
discoveryHeartbeatName ::=
identifier
discoveryType
指定数据库发现服务类型,ShardingSphere
内置支持 MySQL.MGR
;ruleName
将无法被创建;discoveryType
和 discoveryHeartbeat
无法被删除;-
的命名在改动时需要使用 " "
。discoveryRule
时同时创建 discoveryType
和 discoveryHeartbeat
CREATE DB_DISCOVERY RULE db_discovery_group_0 (
RESOURCES(ds_0, ds_1, ds_2),
TYPE(NAME='MySQL.MGR',PROPERTIES('group-name'='92504d5b-6dec')),
HEARTBEAT(PROPERTIES('keep-alive-cron'='0/5 * * * * ?'))
);
discoveryType
和 discoveryHeartbeat
创建 discoveryRule
CREATE DB_DISCOVERY RULE db_discovery_group_1 (
RESOURCES(ds_0, ds_1, ds_2),
TYPE=db_discovery_group_1_mgr,
HEARTBEAT=db_discovery_group_1_heartbeat
);
CREATE
、DB_DISCOVERY
、RULE
、RESOURCES
、TYPE
、NAME
、PROPERTIES
、HEARTBEAT