使用 OBShell 扩容 OceanBase 集群

更新时间：2026-04-10 11:58:36

编辑

OBShell 扩容 OceanBase 数据库支持两种方式：

通过调用 API 扩容
通过 OBShell 命令扩容

本文将以一个 3 副本的 OceanBase 集群为例，介绍如何通过 OBShell 扩容 OceanBase 集群。

前提条件

OceanBase 集群已被 OBShell 运维管理，详细的判断方法及接管操作可参见接管非 OBShell 部署集群。
OceanBase 集群的所有 OBServer 节点和 OBShell 都正常运行。

部署模式

本文中四台机器的使用情况如下（OBShell 使用默认端口 2886）：

角色	机器	备注
OBServer 节点	10.10.10.1	OceanBase 数据库 Zone1
OBServer 节点	10.10.10.2	OceanBase 数据库 Zone2
OBServer 节点	10.10.10.3	OceanBase 数据库 Zone3
用于扩容的 OBServer 节点	10.10.10.4	将被扩容到 OceanBase 数据库 Zone1

通过 API 扩容

说明

OBShell 会对被调用的 API 进行安全校验。因此，您在每次调用 API 之前都需先参考基于公钥加密的认证一文对请求进行加密，并在 curl 命令中配置加密后的请求头部（${request_headers}）和请求体（${request_body}）。

步骤 1：启动 OBShell

在待扩容到集群的节点（10.10.10.4）上启动 OBShell，详情请参见启动 OBShell。

[admin@test004 ~]$ /home/admin/oceanbase/bin/obshell admin start --ip 10.10.10.4 -P 2886

步骤 2：调用扩容接口

调用集群内的任一 OBShell 的 /api/v1/ob/scale_out 接口发起扩容。

命令行命令

Python

命令行中调用对应 API 接口的说明可参见扩容。该接口会创建一个异步运维任务，查看任务进度的方法可参见获取任务的详细信息。等待任务完成，则扩容完成。

[admin@test001 ~]$ curl -H "Content-Type: application/json" -H 'X-OCS-Header:${request_headers}' -X POST -d '${request_body}'  http://10.10.10.1:2886/api/v1/ob/scale_out

通过 OBShell-SDK-Python 请求对应 API 方法的介绍可参见扩容。

···
client = ClientSet("10.10.10.1", 2886, PasswordAuth("****"))
configs = {"redoDir":"/data/workspace/redo", "dataDir":"/data/workspace/data", 
           "datafile_size":"24G", "cpu_count":"16", "memory_limit":"16G", 
           "system_memory":"4G", "log_disk_size":"40G"}
client.v1.scale_out_sync("10.10.10.4", 2886, "zone1", configs)  ## 调用 /api/v1/ob/scale_out
···

通过 OBShell-SDK-GO 请求对应 API 方法的介绍可参见扩容。

···
client, err := services.NewClientWithPassword("10.10.10.1", 2886, "****")
configs := map[string]string {
    "redoDir":"/data/workspace/redo", "dataDir":"/data/workspace/data", 
    "datafile_size":"24G", "cpu_count":"16", "memory_limit":"16G", 
    "system_memory":"4G", "log_disk_size":"40G"}
req := client.V1().NewScaleOutRequest("10.10.10.4", 2886, "zone1", configs)
dag, err := client.V1().ScaleOutSyncWithRequest(req)  // 调用 /api/v1/ob/scale_out
···

步骤 3：验证扩容是否成功

使用 root 用户登陆 OceanBase 数据库的 sys 租户，执行如下命令查看集群中的所有 OBServer 节点信息。

obclient [oceanbase]> select * from oceanbase.dba_ob_servers;

输出如下：

+------------+----------+----+-------+----------+-----------------+--------+----------------------------+-----------+-----------------------+----------------------------+----------------------------+-------------------------------------------------------------------------------------------+-------------------+
| 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                                                                             | LAST_OFFLINE_TIME |
+------------+----------+----+-------+----------+-----------------+--------+----------------------------+-----------+-----------------------+----------------------------+----------------------------+-------------------------------------------------------------------------------------------+-------------------+
| 10.10.10.1 |     2882 |  1 | zone1 |     2881 | YES             | ACTIVE | 2024-04-09 17:47:47.849965 | NULL      | NULL                  | 2024-04-09 17:47:42.054759 | 2024-04-09 17:47:48.850012 | 4.2.2.0_100010012024022719-c984fe7cb7a4cef85a40323a0d073f0c9b7b8235(Feb 27 2024 19:20:54) | NULL              |
| 10.10.10.2 |     2882 |  2 | zone2 |     2881 | NO              | ACTIVE | 2024-04-09 17:47:47.749100 | NULL      | NULL                  | 2024-04-09 17:47:42.173519 | 2024-04-09 17:47:48.850012 | 4.2.2.0_100010012024022719-c984fe7cb7a4cef85a40323a0d073f0c9b7b8235(Feb 27 2024 19:20:54) | NULL              |
| 10.10.10.3 |     2882 |  3 | zone3 |     2881 | NO              | ACTIVE | 2024-04-09 17:47:47.490511 | NULL      | NULL                  | 2024-04-09 17:47:42.567437 | 2024-04-09 17:47:48.850012 | 4.2.2.0_100010012024022719-c984fe7cb7a4cef85a40323a0d073f0c9b7b8235(Feb 27 2024 19:20:54) | NULL              |
| 10.10.10.4 |     2882 |  4 | zone1 |     2881 | NO              | ACTIVE | 2024-04-10 10:37:47.530894 | NULL      | NULL                  | 2024-04-09 10:27:32.222980 | 2024-04-09 17:47:48.850012 | 4.2.2.0_100010012024022719-c984fe7cb7a4cef85a40323a0d073f0c9b7b8235(Feb 27 2024 19:20:54) | NULL              |
+------------+----------+----+-------+----------+-----------------+--------+----------------------------+-----------+-----------------------+----------------------------+----------------------------+-------------------------------------------------------------------------------------------+-------------------+

执行如下命令查看 OBShell 管理的 OBServer 节点。

obclient [oceanbase]> select * from ocs.all_agent;

输出如下：

+------------+------+---------------+----------------------+-------+--------------+-------+------------+----------+--------------------------+------------------------------------------------------------------------------------------------------+
| ip         | port | identity      | version              | os    | architecture | zone  | mysql_port | rpc_port | home_path                | public_key                                                                                           |
+------------+------+---------------+----------------------+-------+--------------+-------+------------+----------+--------------------------+------------------------------------------------------------------------------------------------------+
| 10.10.10.1 | 2886 | CLUSTER AGENT | 4.2.2.0-102024011512 | linux | x86_64       | zone1 |       2881 |     2882 | /home/admin/oceanbase-ce | MEgCQQCfqaND/dAbH/cJhOuTP8gRUBZh1nqrNtFwB9Plw6YwWiSintZPiC9pN/FKlBeR/Klt2jvu8oqZe+S3p/xq+ckPAgMBAAE= |
| 10.10.10.2 | 2886 | CLUSTER AGENT | 4.2.2.0-102024011512 | linux | x86_64       | zone2 |       2881 |     2882 | /home/admin/oceanbase-ce | MEgCQQCfqaND/dAbH/cJhOuTP8gRUBZh1nqrNtFwB9Plw6YwWiSintZPiC9pN/FKlBeR/Klt2jvu8oqZe+S3p/xq+ckPAgMBAAE= |
| 10.10.10.3 | 2886 | CLUSTER AGENT | 4.2.2.0-102024011512 | linux | x86_64       | zone3 |       2881 |     2882 | /home/admin/oceanbase-ce | MEgCQQCfqaND/dAbH/cJhOuTP8gRUBZh1nqrNtFwB9Plw6YwWiSintZPiC9pN/FKlBeR/Klt2jvu8oqZe+S3p/xq+ckPAgMBAAE= |
| 10.10.10.4 | 2886 | CLUSTER AGENT | 4.2.2.0-102024011512 | linux | x86_64       | zone1 |       2881 |     2882 | /home/admin/oceanbase-ce | MEgCQQCfqaND/dAbH/cJhOuTP8gRUBZh1nqrNtFwB9Plw6YwWiSintZPiC9pN/FKlBeR/Klt2jvu8oqZe+S3p/xq+ckPAgMBAAE= |
+------------+------+---------------+----------------------+-------+--------------+-------+------------+----------+--------------------------+------------------------------------------------------------------------------------------------------+

如果以上两条命令都能看到新扩容的 OBServer 节点的信息，则说明扩容成功。

步骤 4：租户内资源扩容

OceanBase 集群扩容成功后，租户内的资源扩容详见租户内资源扩容和缩容概述。

通过 OBShell 命令扩容

步骤 1：启动 OBShell

在待扩容到集群的节点（10.10.10.4）上启动 OBShell，详情请参见启动 OBShell。

[admin@test004 ~]$ /home/admin/oceanbase/bin/obshell admin start --ip 10.10.10.4 -P 2886

步骤 2：调用扩容命令执行扩容

通过命令行扩容时，命令需要在待扩容到集群的节点上发起。在待扩容到集群的节点（10.10.10.4）上执行 obshell cluster scale-out 命令。命令介绍请详见 obshell cluster scale-out。

[admin@test004 ~]$ /home/admin/oceanbase/bin/obshell cluster scale-out -s '10.10.10.1:2886' -z 'zone1' -o 'memory_limit=16G,system_memory=8G,log_disk_size=24G,datafile_size=24G' --rp ********

步骤 3：验证扩容成功

使用 root 用户登陆 OceanBase 数据库的 sys 租户，执行如下命令查看集群中的所有 OBServer 节点信息。

obclient [oceanbase]> select * from oceanbase.dba_ob_servers;

输出如下：

+------------+----------+----+-------+----------+-----------------+--------+----------------------------+-----------+-----------------------+----------------------------+----------------------------+-------------------------------------------------------------------------------------------+-------------------+
| 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                                                                             | LAST_OFFLINE_TIME |
+------------+----------+----+-------+----------+-----------------+--------+----------------------------+-----------+-----------------------+----------------------------+----------------------------+-------------------------------------------------------------------------------------------+-------------------+
| 10.10.10.1 |     2882 |  1 | zone1 |     2881 | YES             | ACTIVE | 2024-04-09 17:47:47.849965 | NULL      | NULL                  | 2024-04-09 17:47:42.054759 | 2024-04-09 17:47:48.850012 | 4.2.2.0_100010012024022719-c984fe7cb7a4cef85a40323a0d073f0c9b7b8235(Feb 27 2024 19:20:54) | NULL              |
| 10.10.10.2 |     2882 |  2 | zone2 |     2881 | NO              | ACTIVE | 2024-04-09 17:47:47.749100 | NULL      | NULL                  | 2024-04-09 17:47:42.173519 | 2024-04-09 17:47:48.850012 | 4.2.2.0_100010012024022719-c984fe7cb7a4cef85a40323a0d073f0c9b7b8235(Feb 27 2024 19:20:54) | NULL              |
| 10.10.10.3 |     2882 |  3 | zone3 |     2881 | NO              | ACTIVE | 2024-04-09 17:47:47.490511 | NULL      | NULL                  | 2024-04-09 17:47:42.567437 | 2024-04-09 17:47:48.850012 | 4.2.2.0_100010012024022719-c984fe7cb7a4cef85a40323a0d073f0c9b7b8235(Feb 27 2024 19:20:54) | NULL              |
| 10.10.10.4 |     2882 |  4 | zone1 |     2881 | NO              | ACTIVE | 2024-04-10 10:37:47.530894 | NULL      | NULL                  | 2024-04-09 10:27:32.222980 | 2024-04-09 17:47:48.850012 | 4.2.2.0_100010012024022719-c984fe7cb7a4cef85a40323a0d073f0c9b7b8235(Feb 27 2024 19:20:54) | NULL              |
+------------+----------+----+-------+----------+-----------------+--------+----------------------------+-----------+-----------------------+----------------------------+----------------------------+-------------------------------------------------------------------------------------------+-------------------+

执行如下命令查看 OBShell 管理的 OBServer 节点。

obclient [oceanbase]> select * from ocs.all_agent;

输出如下：

+------------+------+---------------+----------------------+-------+--------------+-------+------------+----------+--------------------------+------------------------------------------------------------------------------------------------------+
| ip         | port | identity      | version              | os    | architecture | zone  | mysql_port | rpc_port | home_path                | public_key                                                                                           |
+------------+------+---------------+----------------------+-------+--------------+-------+------------+----------+--------------------------+------------------------------------------------------------------------------------------------------+
| 10.10.10.1 | 2886 | CLUSTER AGENT | 4.2.2.0-102024011512 | linux | x86_64       | zone1 |       2881 |     2882 | /home/admin/oceanbase-ce | MEgCQQCfqaND/dAbH/cJhOuTP8gRUBZh1nqrNtFwB9Plw6YwWiSintZPiC9pN/FKlBeR/Klt2jvu8oqZe+S3p/xq+ckPAgMBAAE= |
| 10.10.10.2 | 2886 | CLUSTER AGENT | 4.2.2.0-102024011512 | linux | x86_64       | zone2 |       2881 |     2882 | /home/admin/oceanbase-ce | MEgCQQCfqaND/dAbH/cJhOuTP8gRUBZh1nqrNtFwB9Plw6YwWiSintZPiC9pN/FKlBeR/Klt2jvu8oqZe+S3p/xq+ckPAgMBAAE= |
| 10.10.10.3 | 2886 | CLUSTER AGENT | 4.2.2.0-102024011512 | linux | x86_64       | zone3 |       2881 |     2882 | /home/admin/oceanbase-ce | MEgCQQCfqaND/dAbH/cJhOuTP8gRUBZh1nqrNtFwB9Plw6YwWiSintZPiC9pN/FKlBeR/Klt2jvu8oqZe+S3p/xq+ckPAgMBAAE= |
| 10.10.10.4 | 2886 | CLUSTER AGENT | 4.2.2.0-102024011512 | linux | x86_64       | zone1 |       2881 |     2882 | /home/admin/oceanbase-ce | MEgCQQCfqaND/dAbH/cJhOuTP8gRUBZh1nqrNtFwB9Plw6YwWiSintZPiC9pN/FKlBeR/Klt2jvu8oqZe+S3p/xq+ckPAgMBAAE= |
+------------+------+---------------+----------------------+-------+--------------+-------+------------+----------+--------------------------+------------------------------------------------------------------------------------------------------+

如果以上两条命令都能看到新扩容的 OBServer 节点的信息，则说明扩容成功。

步骤 4：租户内资源的扩容

OceanBase 集群扩容成功后，租户内的资源扩容详见租户内资源扩容和缩容概述。