OceanBase集群缩容
连接sys租户
使用root用户连接sys租户的oceanbase数据库
[admin]# mysql -h192.168.1.71 -P2883 -D oceanbase -uroot@sys -pOceanbase2881 -A租户减少副本
查看租户信息，sys、my_tenat租户（sys是系统租户，my_tenant是我创建的测试租户）的LOCALITY值包括：zone1、zone2、zone3
mysql> select * from DBA_OB_TENANTS;
+-----------+-------------+-------------+----------------------------+----------------------------+--------------+---------------------------------------------+-------------------+--------------------+--------+---------------+--------+
| TENANT_ID | TENANT_NAME | TENANT_TYPE | CREATE_TIME | MODIFY_TIME | PRIMARY_ZONE | LOCALITY | PREVIOUS_LOCALITY | COMPATIBILITY_MODE | STATUS | IN_RECYCLEBIN | LOCKED |
+-----------+-------------+-------------+----------------------------+----------------------------+--------------+---------------------------------------------+-------------------+--------------------+--------+---------------+--------+
| 1 | sys | SYS | 2023-04-24 18:33:06.821930 | 2023-05-08 18:23:29.612310 | RANDOM | FULL{1}@zone1, FULL{1}@zone2, FULL{1}@zone3 | NULL | MYSQL | NORMAL | NO | NO |
| 1003 | META$1004 | META | 2023-04-25 16:54:07.990306 | 2023-05-08 18:25:26.069907 | RANDOM | FULL{1}@zone1, FULL{1}@zone2, FULL{1}@zone3 | NULL | MYSQL | NORMAL | NO | NO |
| 1004 | my_tenant | USER | 2023-04-25 16:54:07.991849 | 2023-05-08 18:25:26.069907 | RANDOM | FULL{1}@zone1, FULL{1}@zone2, FULL{1}@zone3 | NULL | MYSQL | NORMAL | NO | NO |
+-----------+-------------+-------------+----------------------------+----------------------------+--------------+---------------------------------------------+-------------------+--------------------+--------+---------------+--------+从租户中删除zone3
mysql> alter tenant sys LOCALITY='FULL{1}@zone1,FULL{1}@zone2';
Query OK, 0 rows affected (3.98 sec)
mysql> alter tenant my_tenant LOCALITY='FULL{1}@zone1,FULL{1}@zone2';
Query OK, 0 rows affected (2.93 sec)查看租户信息，可以看到sys、my_tenant租户的LOCALITY值只包括：zone1、zone2
mysql> select * from DBA_OB_TENANTS;
+-----------+-------------+-------------+----------------------------+----------------------------+--------------+------------------------------+-------------------+--------------------+--------+---------------+--------+
| TENANT_ID | TENANT_NAME | TENANT_TYPE | CREATE_TIME | MODIFY_TIME | PRIMARY_ZONE | LOCALITY | PREVIOUS_LOCALITY | COMPATIBILITY_MODE | STATUS | IN_RECYCLEBIN | LOCKED |
+-----------+-------------+-------------+----------------------------+----------------------------+--------------+------------------------------+-------------------+--------------------+--------+---------------+--------+
| 1 | sys | SYS | 2023-04-24 18:33:06.821930 | 2023-05-09 09:28:07.989177 | RANDOM | FULL{1}@zone1, FULL{1}@zone2 | NULL | MYSQL | NORMAL | NO | NO |
| 1003 | META$1004 | META | 2023-04-25 16:54:07.990306 | 2023-05-09 09:28:31.056441 | RANDOM | FULL{1}@zone1, FULL{1}@zone2 | NULL | MYSQL | NORMAL | NO | NO |
| 1004 | my_tenant | USER | 2023-04-25 16:54:07.991849 | 2023-05-09 09:28:31.056441 | RANDOM | FULL{1}@zone1, FULL{1}@zone2 | NULL | MYSQL | NORMAL | NO | NO |
+-----------+-------------+-------------+----------------------------+----------------------------+--------------+------------------------------+-------------------+--------------------+--------+---------------+--------+资源池删除zone3
查看资源池信息，sys_pool、my_pool资源池（sys_pool是系统资源池，my_pool是我创建的测试资源池）的ZONE_LIST包括：zone1、zone2、zone3
mysql> select * from DBA_OB_RESOURCE_POOLS;
+------------------+----------+-----------+----------------------------+----------------------------+------------+----------------+-------------------+--------------+
| RESOURCE_POOL_ID | NAME | TENANT_ID | CREATE_TIME | MODIFY_TIME | UNIT_COUNT | UNIT_CONFIG_ID | ZONE_LIST | REPLICA_TYPE |
+------------------+----------+-----------+----------------------------+----------------------------+------------+----------------+-------------------+--------------+
| 1 | sys_pool | 1 | 2023-04-24 18:33:06.599543 | 2023-05-08 18:13:57.287837 | 1 | 1 | zone1;zone2;zone3 | FULL |
| 1007 | my_pool | 1004 | 2023-04-25 15:43:45.381999 | 2023-05-08 18:14:21.769913 | 1 | 1003 | zone1;zone2;zone3 | FULL |
+------------------+----------+-----------+----------------------------+----------------------------+------------+----------------+-------------------+--------------+从资源池zone_list中删除zone3
mysql> alter resource pool sys_pool ZONE_LIST=('zone1','zone2');
Query OK, 0 rows affected (0.20 sec)
mysql> alter resource pool my_pool ZONE_LIST=('zone1','zone2');
Query OK, 0 rows affected (0.29 sec)查看资源池信息，sys_pool、my_pool资源池（sys_pool是系统资源池，my_pool是我创建的测试资源池）的ZONE_LIST包括：zone1、zone2
mysql> select * from DBA_OB_RESOURCE_POOLS;
+------------------+----------+-----------+----------------------------+----------------------------+------------+----------------+-------------+--------------+
| RESOURCE_POOL_ID | NAME | TENANT_ID | CREATE_TIME | MODIFY_TIME | UNIT_COUNT | UNIT_CONFIG_ID | ZONE_LIST | REPLICA_TYPE |
+------------------+----------+-----------+----------------------------+----------------------------+------------+----------------+-------------+--------------+
| 1 | sys_pool | 1 | 2023-04-24 18:33:06.599543 | 2023-05-09 09:41:36.796368 | 1 | 1 | zone1;zone2 | FULL |
| 1007 | my_pool | 1004 | 2023-04-25 15:43:45.381999 | 2023-05-09 09:41:43.783302 | 1 | 1003 | zone1;zone2 | FULL |
+------------------+----------+-----------+----------------------------+----------------------------+------------+----------------+-------------+--------------+删除节点
查看节点信息
mysql> select * from DBA_OB_SERVERS;
+--------------+----------+----+-------+----------+-----------------+--------+----------------------------+-----------+-----------------------+----------------------------+----------------------------+-------------------------------------------------------------------------------------------+
| SVR_IP | SVR_PORT | ID | ZONE | SQL_PORT | WITH_ROOTSERVER | STATUS | START_SERVICE_TIME | STOP_TIME | BLOCK_MIGRATE_IN_TIME | CREATE_TIME | MODIFY_TIME | BUILD_VERSION |
+--------------+----------+----+-------+----------+-----------------+--------+----------------------------+-----------+-----------------------+----------------------------+----------------------------+-------------------------------------------------------------------------------------------+
| 192.168.1.71 | 2882 | 1 | zone1 | 2881 | YES | ACTIVE | 2023-05-06 15:14:10.951435 | NULL | NULL | 2023-04-24 18:32:52.606554 | 2023-05-09 05:01:04.983560 | 4.0.0.0_100000272022110114-6af7f9ae79cd0ecbafd4b1b88e2886ccdba0c3be(Nov 1 2022 14:57:18) |
| 192.168.1.72 | 2882 | 2 | zone2 | 2881 | NO | ACTIVE | 2023-05-06 15:07:46.780470 | NULL | NULL | 2023-04-24 18:32:52.245134 | 2023-05-09 05:01:05.072178 | 4.0.0.0_100000272022110114-6af7f9ae79cd0ecbafd4b1b88e2886ccdba0c3be(Nov 1 2022 14:57:18) |
| 192.168.1.73 | 2882 | 4 | zone3 | 2881 | NO | ACTIVE | 2023-05-08 18:08:33.287859 | NULL | NULL | 2023-05-08 18:08:26.713833 | 2023-05-09 05:01:05.686120 | 4.0.0.0_100000272022110114-6af7f9ae79cd0ecbafd4b1b88e2886ccdba0c3be(Nov 1 2022 14:57:18) |
+--------------+----------+----+-------+----------+-----------------+--------+----------------------------+-----------+-----------------------+----------------------------+----------------------------+-------------------------------------------------------------------------------------------+隔离192.168.1.73节点
mysql> alter system stop server '192.168.1.73:2882';
Query OK, 0 rows affected (0.94 sec)查看节点信息，192.168.1.73节点STOP_TIME值是隔离的时间点
mysql> select * from DBA_OB_SERVERS;
+--------------+----------+----+-------+----------+-----------------+--------+----------------------------+----------------------------+-----------------------+----------------------------+----------------------------+-------------------------------------------------------------------------------------------+
| SVR_IP | SVR_PORT | ID | ZONE | SQL_PORT | WITH_ROOTSERVER | STATUS | START_SERVICE_TIME | STOP_TIME | BLOCK_MIGRATE_IN_TIME | CREATE_TIME | MODIFY_TIME | BUILD_VERSION |
+--------------+----------+----+-------+----------+-----------------+--------+----------------------------+----------------------------+-----------------------+----------------------------+----------------------------+-------------------------------------------------------------------------------------------+
| 192.168.1.71 | 2882 | 1 | zone1 | 2881 | YES | ACTIVE | 2023-05-06 15:14:10.951435 | NULL | NULL | 2023-04-24 18:32:52.606554 | 2023-05-09 05:01:04.983560 | 4.0.0.0_100000272022110114-6af7f9ae79cd0ecbafd4b1b88e2886ccdba0c3be(Nov 1 2022 14:57:18) |
| 192.168.1.72 | 2882 | 2 | zone2 | 2881 | NO | ACTIVE | 2023-05-06 15:07:46.780470 | NULL | NULL | 2023-04-24 18:32:52.245134 | 2023-05-09 05:01:05.072178 | 4.0.0.0_100000272022110114-6af7f9ae79cd0ecbafd4b1b88e2886ccdba0c3be(Nov 1 2022 14:57:18) |
| 192.168.1.73 | 2882 | 4 | zone3 | 2881 | NO | ACTIVE | 2023-05-08 18:08:33.287859 | 2023-05-09 09:46:20.363214 | NULL | 2023-05-08 18:08:26.713833 | 2023-05-09 09:46:20.391424 | 4.0.0.0_100000272022110114-6af7f9ae79cd0ecbafd4b1b88e2886ccdba0c3be(Nov 1 2022 14:57:18) |
+--------------+----------+----+-------+----------+-----------------+--------+----------------------------+----------------------------+-----------------------+----------------------------+----------------------------+-------------------------------------------------------------------------------------------+到192.168.1.73节点上的observer服务
[root]# kill -9 `pidof observer`查看节点信息，192.168.1.73节点状态为INACTIVE
mysql> select * from DBA_OB_SERVERS;
+--------------+----------+----+-------+----------+-----------------+----------+----------------------------+----------------------------+-----------------------+----------------------------+----------------------------+-------------------------------------------------------------------------------------------+
| SVR_IP | SVR_PORT | ID | ZONE | SQL_PORT | WITH_ROOTSERVER | STATUS | START_SERVICE_TIME | STOP_TIME | BLOCK_MIGRATE_IN_TIME | CREATE_TIME | MODIFY_TIME | BUILD_VERSION |
+--------------+----------+----+-------+----------+-----------------+----------+----------------------------+----------------------------+-----------------------+----------------------------+----------------------------+-------------------------------------------------------------------------------------------+
| 192.168.1.71 | 2882 | 1 | zone1 | 2881 | YES | ACTIVE | 2023-05-06 15:14:10.951435 | NULL | NULL | 2023-04-24 18:32:52.606554 | 2023-05-09 05:01:04.983560 | 4.0.0.0_100000272022110114-6af7f9ae79cd0ecbafd4b1b88e2886ccdba0c3be(Nov 1 2022 14:57:18) |
| 192.168.1.72 | 2882 | 2 | zone2 | 2881 | NO | ACTIVE | 2023-05-06 15:07:46.780470 | NULL | NULL | 2023-04-24 18:32:52.245134 | 2023-05-09 05:01:05.072178 | 4.0.0.0_100000272022110114-6af7f9ae79cd0ecbafd4b1b88e2886ccdba0c3be(Nov 1 2022 14:57:18) |
| 192.168.1.73 | 2882 | 4 | zone3 | 2881 | NO | INACTIVE | NULL | 2023-05-09 09:46:20.363214 | NULL | 2023-05-08 18:08:26.713833 | 2023-05-09 09:47:02.583856 | 4.0.0.0_100000272022110114-6af7f9ae79cd0ecbafd4b1b88e2886ccdba0c3be(Nov 1 2022 14:57:18) |
+--------------+----------+----+-------+----------+-----------------+----------+----------------------------+----------------------------+-----------------------+----------------------------+----------------------------+-------------------------------------------------------------------------------------------+删除192.168.1.73节点
mysql> alter system delete server '192.168.1.73:2882';
Query OK, 0 rows affected (0.23 sec)查看节点信息，此时已经看不到192.168.1.73节点的信息
mysql> select * from DBA_OB_SERVERS;
+--------------+----------+----+-------+----------+-----------------+--------+----------------------------+-----------+-----------------------+----------------------------+----------------------------+-------------------------------------------------------------------------------------------+
| SVR_IP | SVR_PORT | ID | ZONE | SQL_PORT | WITH_ROOTSERVER | STATUS | START_SERVICE_TIME | STOP_TIME | BLOCK_MIGRATE_IN_TIME | CREATE_TIME | MODIFY_TIME | BUILD_VERSION |
+--------------+----------+----+-------+----------+-----------------+--------+----------------------------+-----------+-----------------------+----------------------------+----------------------------+-------------------------------------------------------------------------------------------+
| 192.168.1.71 | 2882 | 1 | zone1 | 2881 | YES | ACTIVE | 2023-05-06 15:14:10.951435 | NULL | NULL | 2023-04-24 18:32:52.606554 | 2023-05-09 05:01:04.983560 | 4.0.0.0_100000272022110114-6af7f9ae79cd0ecbafd4b1b88e2886ccdba0c3be(Nov 1 2022 14:57:18) |
| 192.168.1.72 | 2882 | 2 | zone2 | 2881 | NO | ACTIVE | 2023-05-06 15:07:46.780470 | NULL | NULL | 2023-04-24 18:32:52.245134 | 2023-05-09 05:01:05.072178 | 4.0.0.0_100000272022110114-6af7f9ae79cd0ecbafd4b1b88e2886ccdba0c3be(Nov 1 2022 14:57:18) |
+--------------+----------+----+-------+----------+-----------------+--------+----------------------------+-----------+-----------------------+----------------------------+----------------------------+-------------------------------------------------------------------------------------------+删除zone3
查看ZONE信息
mysql> select * from DBA_OB_ZONES;
+-------+----------------------------+----------------------------+--------+-----+----------------+-----------+
| ZONE | CREATE_TIME | MODIFY_TIME | STATUS | IDC | REGION | TYPE |
+-------+----------------------------+----------------------------+--------+-----+----------------+-----------+
| zone1 | 2023-04-24 18:33:07.113435 | 2023-04-24 18:33:07.113435 | ACTIVE | | default_region | ReadWrite |
| zone2 | 2023-04-24 18:33:07.113435 | 2023-04-24 18:33:07.113435 | ACTIVE | | default_region | ReadWrite |
| zone3 | 2023-05-08 18:03:47.864105 | 2023-05-08 18:07:34.943350 | ACTIVE | | default_region | ReadWrite |
+-------+----------------------------+----------------------------+--------+-----+----------------+-----------+关闭zone3
mysql> alter system stop zone zone3;
Query OK, 0 rows affected (0.41 sec)查看ZONE信息，此时zone3的状态为INACTIVE（待激活）
mysql> select * from DBA_OB_ZONES;
+-------+----------------------------+----------------------------+----------+-----+----------------+-----------+
| ZONE | CREATE_TIME | MODIFY_TIME | STATUS | IDC | REGION | TYPE |
+-------+----------------------------+----------------------------+----------+-----+----------------+-----------+
| zone1 | 2023-04-24 18:33:07.113435 | 2023-04-24 18:33:07.113435 | ACTIVE | | default_region | ReadWrite |
| zone2 | 2023-04-24 18:33:07.113435 | 2023-04-24 18:33:07.113435 | ACTIVE | | default_region | ReadWrite |
| zone3 | 2023-05-08 18:03:47.864105 | 2023-05-09 09:49:24.709821 | INACTIVE | | default_region | ReadWrite |
+-------+----------------------------+----------------------------+----------+-----+----------------+-----------+删除zone3
mysql> alter system delete zone zone3;
Query OK, 0 rows affected (0.13 sec)查看ZONE信息，此时已经看不到zone3的信息
mysql> select * from DBA_OB_ZONES;
+-------+----------------------------+----------------------------+--------+-----+----------------+-----------+
| ZONE | CREATE_TIME | MODIFY_TIME | STATUS | IDC | REGION | TYPE |
+-------+----------------------------+----------------------------+--------+-----+----------------+-----------+
| zone1 | 2023-04-24 18:33:07.113435 | 2023-04-24 18:33:07.113435 | ACTIVE | | default_region | ReadWrite |
| zone2 | 2023-04-24 18:33:07.113435 | 2023-04-24 18:33:07.113435 | ACTIVE | | default_region | ReadWrite |
+-------+----------------------------+----------------------------+--------+-----+----------------+-----------+
删除ZONE参考：https://www.oceanbase.com/docs/common-oceanbase-database-cn-10000000001687939
删除节点参考：https://www.oceanbase.com/docs/common-oceanbase-database-cn-10000000001692877
