快速入门
本节通过调用一系列API,以集群管理为例,介绍使用GaussDB(DWS) API的基本流程。集群管理的流程如下:
- 调用认证鉴权获取用户的Token,因为在后续的请求中需要将Token放到请求消息头中作为认证。
- 调用查询节点类型接口获取支持的节点类型。
- 调用创建集群接口创建集群。
- 调用查询集群列表接口获取集群信息。
- 调用查询集群详情接口查看集群详细内容。
- 调用创建快照接口创建快照。
- 调用查询快照列表接口查看快照是否创建成功。
- 调用恢复集群接口使用快照恢复集群。
- 当不再需要快照时,调用删除手动快照接口删除快照。
- 当集群使用完成或不再需要时,调用删除集群接口删除集群。
前提条件
- 已创建VPC、子网和安全组,并获取VPC、子网和安全组的ID,具体请参见创建VPC。
- 已获取IAM的EndPoint和GaussDB(DWS)的Endpoint。
- 已获取项目ID,具体请参见获取项目ID。
集群管理
假设已获取前提条件中的信息为如下值(实际操作中您需要根据实际情况替换):
- IAM的Endpoint:下面示例中以iam_endpoint代替
- GaussDB(DWS)的Endpoint:下面示例中以dws_endpoint代替
- VPC的ID:219ab8a0-1272-4049-a383-8ad0b770fa11
- 子网的ID:d23ef2e9-8b90-49b3-bc4a-fd7d6bea6bec
- 安全组的ID:12e3c23a-8710-4b75-95e4-5c8d7f68ef3c
- 项目ID:9bc552e6-19af-4326-800d-281a92984636
则可以通过如下步骤管理集群。
- 调用其他接口前,需要调用认证鉴权中的接口获取Token,并设置成环境变量。
curl -H "Content-type:application/json" https://{iam_endpoint}/v3/auth/tokens -X POST -d '{ "auth": { "identity": { "methods": [ "password" ], "password": { "user": { "name": "testname", "domain": { "name": "testname" }, "password": "Passw0rd" } } }, "scope": { "project": { "name": "cn-north-4" } } } }' -v -k
- 调用查询节点类型接口获取支持的节点类型。
curl -X GET -H 'Content-type:application/json;charset=utf-8' -H "X-Auth-Token:$Token" https://{dws_endpoint}/v1.0/9bc552e6-19af-4326-800d-281a92984636/node_types -v -k
获取响应如下所示:
status CODE 200 { "node_types": [ { "spec_name": "dws.d2.xlarge", "id": "ebe532d6-665f-40e6-a4d4-3c51545b6a67", "detail": [ { "type": "vCPU", "value": "4" }, { "value": "1675", "type": "LOCAL_DISK", "unit": "GB" }, { "type": "mem", "value": "32", "unit": "GB" } ] }, { "spec_name": "dws.m1.xlarge.ultrahigh", "id": "ebe532d6-665f-40e6-a4d4-3c51545b4f71", "detail": [ { "type": "vCPU", "value": "4" }, { "value": "512", "type": "SSD", "unit": "GB" }, { "type": "mem", "value": "32", "unit": "GB" } ] } ] }
- 调用创建集群接口创建集群。
创建集群配置样例信息如下:
- 集群名称:dws-demo
- 管理员用户名:dbadmin
- 管理员密码:passw0rd
- 端口:8000
- 节点类型:dws.d1.xlarge
- 节点数量:3
- 弹性IP:auto_assign(自动绑定)
curl -X POST -H 'Content-type:application/json;charset=utf-8' -H "X-Auth-Token:$Token" -d '{ "node_type": "dws.d1.xlarge", "number_of_node": 3, "subnet_id": "d23ef2e9-8b90-49b3-bc4a-fd7d6bea6bec", "security_group_id": "12e3c23a-8710-4b75-95e4-5c8d7f68ef3c", "vpc_id": "219ab8a0-1272-4049-a383-8ad0b770fa11", "port": 8000, "name": "dws-demo", "user_name": "dbadmin", "user_pwd": "passw0rd", "public_ip": { "public_bind_type": "auto_assign" } }' https://{dws_endpoint}/v1.0/9bc552e6-19af-4326-800d-281a92984636/clusters -v -k
如果返回状态码为200,则说明创建集群请求下发成功。
- 调用查询集群列表接口获取集群信息。
curl -X GET -H 'Content-type:application/json;charset=utf-8' -H "X-Auth-Token:$Token" https://{dws_endpoint}/v1.0/9bc552e6-19af-4326-800d-281a92984636/clusters -k –v
获取响应如下所示:
{ "clusters": [ { "id": "7ba031f6-81f4-4670-ad20-c490b91877e5", "status": "AVAILABLE", "sub_status": "NORMAL", "task_status": null, "action_progress": null, "node_type": "dws.d1.xlarge", "subnet_id": "d23ef2e9-8b90-49b3-bc4a-fd7d6bea6bec", "security_group_id": "12e3c23a-8710-4b75-95e4-5c8d7f68ef3c", "number_of_node": 3, "availability_zone": "cn-north-4b", "port": 8000, "name": "dws-demo", "version": "1.1.0", "vpc_id": "219ab8a0-1272-4049-a383-8ad0b770fa11", "user_name": "dbadmin", "public_ip": { "public_bind_type": "auto_assign", "eip_id": "85b20d7e-9eb7-4b2a-98f3-3c8843ea3574" }, "public_endpoints": [ { "public_connect_info": "dws-demo.cn-north-4.myhuaweicloud.com", "jdbc_url": "jdbc:postgresql://dws-demo.cn-north-4.myhuaweicloud.com/<YOUR_DATABASE_name>" } ], "endpoints": [ { "connect_info": "dws-demo.cn-north-4.myhuaweicloud.com", "jdbc_url": "jdbc:postgresql://dws-demo.cn-north-4.myhuaweicloud.com/<YOUR_DATABASE_name>" }, ] , "updated": "2018-01-15T12:50:06", "created": "2018-01-15T12:50:06", "recent_event": 1 } ] }
- status的状态如果为“CREATING”,则表示集群正处于创建中;若为“AVAILABLE”则表示集群创建成功。
- dws-demo集群对应的UUid为7ba031f6-81f4-4670-ad20-c490b91877e5,记录该UUid,方便后续步骤使用。
- 调用查询集群详情接口查看集群详细内容。
curl -X GET -H "Content-type:application/json" -H "X-Auth-Token:$Token" https://{dws_endpoint}/v1.0/9bc552e6-19af-4326-800d-281a92984636/clusters/7ba031f6-81f4-4670-ad20-c490b91877e5 -k -v
获取响应如下所示:
{ "cluster": { "id": "7ba031f6-81f4-4670-ad20-c490b91877e5", "status": "AVAILABLE", "name": "dws-demo", "updated": "2018-01-15T12:50:06", "created": "2018-01-15T12:50:06", "user_name": "dbadmin", "sub_status": "NORMAL", "task_status": null, "action_progress": null, "node_type": "dws.d1.xlarge", "node_type_id": "5ddb1071-c5d7-40e0-a874-8a032e81a697", "subnet_id": "d23ef2e9-8b90-49b3-bc4a-fd7d6bea6bec", "security_group_id": "12e3c23a-8710-4b75-95e4-5c8d7f68ef3c", "number_of_node": 3, "availability_zone": "cn-north-4b", "port": 8000, "vpc_id": "219ab8a0-1272-4049-a383-8ad0b770fa11", "public_ip": { "public_bind_type": "auto_assign", "eip_id": "85b20d7e-9eb7-4b2a-98f3-3c8843ea3574" }, "public_endpoints": [ { "public_connect_info": "dws-demo.cn-north-4.myhuaweicloud.com", "jdbc_url": "jdbc:postgresql://dws-demo.cn-north-4.myhuaweicloud.com/<YOUR_DATABASE_name>" } ], "endpoints": [ { "connect_info": "dws-demo.cn-north-4.myhuaweicloud.com", "jdbc_url": "jdbc:postgresql://dws-demo.cn-north-4.myhuaweicloud.com/<YOUR_DATABASE_name>" }, { "connect_info": "192.168.0.12:8000", "jdbc_url": "jdbc:postgresql://192.168.0.12:8000/<YOUR_DATABASE_name>" } ], "version": "1.1.0", "maintain_window": { "day": "Wed", "start_time": "18:00", "end_time": "22:00" }, "recent_event": 1, "tags": null, "parameter_group": { "id": "157e9cc4-64a8-11e8-adc0-fa7ae01bbebc", "name": "Default-Parameter-Group-dws ", "status": "In-Sync" } } }
响应消息中还可以查询到集群的“public_endpoints”和“endpoints”等信息,集群创建成功后,可以使用“public_endpoints”或“endpoints”从外部进行集群访问。
- 调用创建快照接口创建快照。
基于集群dws-demo创建一个名称为snapshotForDemoCluster的快照。
curl -X POST -H "Content-type:application/json" -H "X-Auth-Token:$Token" -d '{ "snapshot": { "name": "snapshotForDemoCluster", "cluster_id": "7ba031f6-81f4-4670-ad20-c490b91877e5", "description": "Snapshot description" } }' https://{dws_endpoint}/v1.0/9bc552e6-19af-4326-800d-281a92984636/snapshots -k -v
获取响应如下所示:
{ "snapshot": { "id": "2a4d0f86-67cd-408a-8b66-017454fb7793" } }
如果返回状态码为200,则说明快照创建请求下发成功,记录“id”,供后续查询快照详情时使用。
- 调用查询快照列表接口查看快照是否创建成功。
curl -X GET -H 'Content-type:application/json;charset=utf-8' -H "X-Auth-Token:$Token" https://{dws_endpoint}/v1.0/9bc552e6-19af-4326-800d-281a92984636/snapshots/2a4d0f86-67cd-408a-8b66-017454fb7793 -k -v
如果响应消息中快照状态为“AVAILABLE”,则说明快照创建成功;若为“CREATING”,则表示快照正在创建中。
{ "snapshot": { "id": "2a4d0f86-67cd-408a-8b66-017454fb7793", "name": "snapshotForDemoCluster", "description": "Snapshot description", "started": "2018-01-18T13:59:23Z", "finished": "2018-01-18T13:01:40Z", "size": 500, "status": "AVAILABLE", "type": "MANUAL", "cluster_id": "4f87d3c4-9e33-482f-b962-e23b30d1a18c" } }
- 调用恢复集群接口使用快照恢复集群。
将快照snapshotForDemoCluster恢复到名称为dws-restore的新集群。
curl -X POST -H 'Content-type:application/json;charset=utf-8' -H "X-Auth-Token:$Token" -d '{ "restore": { "name": "dws-restore" } }' https://{dws_endpoint}/v1.0/9bc552e6-19af-4326-800d-281a92984636/snapshots/2a4d0f86-67cd-408a-8b66-017454fb7793/actions -v -k
如果返回状态码为200,则说明集群恢复成功,可通过恢复集群查看集群恢复状态。
- 当快照不再需要时,调用删除手动快照接口删除快照。
curl -X DELETE -H 'Content-type:application/json;charset=utf-8' -H "X-Auth-Token:$Token" https://{dws_endpoint}/v1.0/9bc552e6-19af-4326-800d-281a92984636/snapshots/2a4d0f86-67cd-408a-8b66-017454fb7793 -v -k
如果返回状态码为202,则说明快照删除成功。
- 当集群使用完成或不再需要时,调用删除集群接口删除集群。
curl -X DELETE -H 'Content-type:application/json;charset=utf-8' -H "X-Auth-Token:$Token" -d '{ "keep_last_manual_snapshot":0 }' https://{dws_endpoint}/v1.0/9bc552e6-19af-4326-800d-281a92984636/clusters/7ba031f6-81f4-4670-ad20-c490b91877e5 -v -k
如果返回状态码为202,则说明集群删除成功。