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背景

OBD 是OceanBase的命令行部署工具，在 obd V2.5.0 版本之前，其主要功能主要是部署各类组件，例如 oceanbase-ce,obproxy-ce,obagent 等。然而，它并不支持组件的变更操作以及组件内部的扩缩容调整。具体来说：

1、若用户希望使用 obd 来扩容 oceanbase-ce，必须手动将新增节点的信息复制到对应组件的精确位置，这一过程繁琐且易出错，因此备受用户诟病。

2、obd 不具备删除通过其部署的组件的功能。

3、可以通过创建新的 deploy_name 来添加新组件，但新部署的组件配置无法与其他组件的配置合并统一进行管理。

因此，很开心在 OBD V2.5.0 开始支持：

•组件内扩容：⽀持除了 ocp-server 以外的全部组件扩容

•组件变更：⽀持添加和删除组件

组件内扩容体验

将 observer 从单节点扩容为 1-1-1的集群

扩容前配置

obd cluster edit-config ob421

user:username: adminkey_file: /home/admin/.ssh/id_rsa
oceanbase-ce:package_hash: b2ccb524f200a9ef0fad2cddf59d309ddaa2e3e4servers:- name: server1ip: 172.24.255.93global:cluster_id: 1mysql_port: 12881rpc_port: 12882home_path: /home/admin/ob421data_dir: /home/admin/ob421_dataredo_dir: /home/admin/ob421_clogmemory_limit: 7G system_memory: 0Mdatafile_size: 6Gdatafile_next: 2Glog_disk_size: 20Gcpu_count: 16production_mode: falseenable_syslog_wf: falseenable_syslog_recycle: truemax_syslog_file_count: 40appname: obclusterroot_password: aaAA11__proxyro_password: aaAA11__server1:zone: zone1local_ip: 172.24.255.93

obd cluster display ob421

Get local repositories and plugins ok
Open ssh connection ok
Cluster status check ok
Connect to observer 172.24.255.93:12881 ok
Wait for observer init ok
+--------------------------------------------------+
|                     observer                     |
+---------------+---------+-------+-------+--------+
| ip            | version | port  | zone  | status |
+---------------+---------+-------+-------+--------+
| 172.24.255.93 | 4.2.1.2 | 12881 | zone1 | ACTIVE |
+---------------+---------+-------+-------+--------+
obclient -h172.24.255.93 -P12881 -uroot -p'aaAA11__' -Doceanbase -ATrace ID: 74eb3f54-a91d-11ee-b841-00163e04608d
If you want to view detailed obd logs, please run: obd display-trace 74eb3f54-a91d-11ee-b841-00163e04608d

准备扩容文件

cat scale_out_zone2_zone3.yaml

oceanbase-ce:servers:- name: server2ip: 172.24.255.94- name: server3ip: 172.24.255.95server2:zone: zone2local_ip: 172.24.255.94server3:zone: zone3local_ip: 172.24.255.95

执行扩容操作

obd cluster scale_out ob421 -c scale_out_zone2_zone3.yaml -v

扩容后确认

obd cluster display ob421

obd cluster display ob421
Get local repositories and plugins ok
Open ssh connection ok
Cluster status check ok
Connect to observer 172.24.255.93:12881 ok
Wait for observer init ok
+--------------------------------------------------+
|                     observer                     |
+---------------+---------+-------+-------+--------+
| ip            | version | port  | zone  | status |
+---------------+---------+-------+-------+--------+
| 172.24.255.93 | 4.2.1.2 | 12881 | zone1 | ACTIVE |
| 172.24.255.94 | 4.2.1.2 | 12881 | zone2 | ACTIVE |
| 172.24.255.95 | 4.2.1.2 | 12881 | zone3 | ACTIVE |
+---------------+---------+-------+-------+--------+
obclient -h172.24.255.93 -P12881 -uroot -p'aaAA11__' -Doceanbase -ATrace ID: 392afd82-a91e-11ee-8391-00163e04608d
If you want to view detailed obd logs, please run: obd display-trace 392afd82-a91e-11ee-8391-00163e04608d

组件变更体验

新增 obproxy-ce 组件

1、准备新增组件的配置文件

cat obproxy1.yaml

obproxy-ce:package_hash: 0aed4b782120e4248b749f67be3d2cc82cdcb70ddepends:- oceanbase-ceservers:- 172.24.255.94global:listen_port: 22883prometheus_listen_port: 22884home_path: /home/admin/obproxy421enable_cluster_checkout: falseskip_proxy_sys_private_check: trueenable_strict_kernel_release: falseobproxy_sys_password: aaAA11__observer_sys_password: aaAA11__

2、执行添加组件操作

obd cluster component add ob421 -c obproxy1.yaml

Get local repositories and plugins ok
Cluster status check ok
Get added repositories and plugins ok
Open ssh connection ok
Connect to observer 172.24.255.93:12881 ok
+---------------------------------------------------------------------------+
|                                  Packages                                 |
+------------+---------+---------+------------------------------------------+
| Repository | Version | Release | Md5                                      |
+------------+---------+---------+------------------------------------------+
| obproxy-ce | 4.2.1.0 | 11.el7  | 0aed4b782120e4248b749f67be3d2cc82cdcb70d |
+------------+---------+---------+------------------------------------------+
Repository integrity check ok
Parameter check ok
Initializes obproxy work home ok
Remote obproxy-ce-4.2.1.0-11.el7-0aed4b782120e4248b749f67be3d2cc82cdcb70d repository install ok
Remote obproxy-ce-4.2.1.0-11.el7-0aed4b782120e4248b749f67be3d2cc82cdcb70d repository lib check ok
Search plugins ok
Load cluster param plugin ok
Check before start obproxy ok
[WARN] OBD-4521: The config observer_sys_password in obproxy-ce did not take effect, please config it in oceanbase-ceStart obproxy ok
obproxy program health check ok
Connect to obproxy ok
Initialize obproxy-ce ok
+--------------------------------------------------+
|                     obproxy                      |
+---------------+-------+-----------------+--------+
| ip            | port  | prometheus_port | status |
+---------------+-------+-----------------+--------+
| 172.24.255.94 | 22883 | 22884           | active |
+---------------+-------+-----------------+--------+
obclient -h172.24.255.94 -P22883 -uroot -p'aaAA11__' -Doceanbase -Aob421 running
Trace ID: 1d33bdde-a938-11ee-bc57-00163e04608d
If you want to view detailed obd logs, please run: obd display-trace 1d33bdde-a938-11ee-bc57-00163e04608d

3、添加组件后确认

确认新组件 (obproxy-ce) 已添加成功且可以和已有的组件（oceanbase-ce) 一起管理

obd cluster display ob421

Get local repositories and plugins ok
Open ssh connection ok
Cluster status check ok
Connect to observer 172.24.255.93:12881 ok
Wait for observer init ok
+--------------------------------------------------+
|                     observer                     |
+---------------+---------+-------+-------+--------+
| ip            | version | port  | zone  | status |
+---------------+---------+-------+-------+--------+
| 172.24.255.93 | 4.2.1.2 | 12881 | zone1 | ACTIVE |
| 172.24.255.94 | 4.2.1.2 | 12881 | zone2 | ACTIVE |
| 172.24.255.95 | 4.2.1.2 | 12881 | zone3 | ACTIVE |
+---------------+---------+-------+-------+--------+
obclient -h172.24.255.93 -P12881 -uroot -p'aaAA11__' -Doceanbase -AConnect to obproxy ok
+--------------------------------------------------+
|                     obproxy                      |
+---------------+-------+-----------------+--------+
| ip            | port  | prometheus_port | status |
+---------------+-------+-----------------+--------+
| 172.24.255.94 | 22883 | 22884           | active |
+---------------+-------+-----------------+--------+
obclient -h172.24.255.94 -P22883 -uroot -p'aaAA11__' -Doceanbase -ATrace ID: 54f29ef2-a938-11ee-86dc-00163e04608d
If you want to view detailed obd logs, please run: obd display-trace 54f29ef2-a938-11ee-86dc-00163e04608d

4、obproxy 组件内扩容

上面的操作执行后，只有一个 obproxy 节点，这里再次体验一下通过 obd 来扩容组件（obprxoy-ce) 的节点：

cat obproxy2.yaml

obproxy-ce:servers:- 172.24.255.95

obd cluster scale_out ob421 -c obproxy2.yaml 

非常赞，扩容就是这么简单。

...
Connect to obproxy ok
+--------------------------------------------------+
|                     obproxy                      |
+---------------+-------+-----------------+--------+
| ip            | port  | prometheus_port | status |
+---------------+-------+-----------------+--------+
| 172.24.255.94 | 22883 | 22884           | active |
| 172.24.255.95 | 22883 | 22884           | active |
+---------------+-------+-----------------+--------+
...

删除 obproxy-ce 组件

obd cluster component del ob421 obproxy-ce

注意事项

1、组件内扩容的配置文件里不允许出现 depends,global 对应的配置，否则会出现类似的报错

   [ERROR] OBD-1023: Failed to merge config: depends is not allowed to be set

2、新增组件时 deploy_name 需要填写已有的 deploy_name ，比如（ob421），填写不存在的名字会有如下类似的报错

   [ERROR] No such deploy: ob421_obproxy.

   PS: 在 obd250 之前的版本新增组件是需要填写一个不存在 deploy_name 名字。

3、obd 组件内扩容 oceanbase-ce 后，不会自动扩容租户的 unit_num，需要手动执行 sql 命令行进行扩容。

4、不支持组件内的缩容操作。