# 给指定集群添加标签-CreateClusterTag
#### 功能介绍
为指定MRS集群添加一个标签，用于集群的分类和检索。一个集群上最多有20个标签。该接口为幂等接口：如果添加的标签key已存在，则覆盖原有标签值。
#### 接口约束
无
#### 调用方法
请参见[如何调用API](https://support.huaweicloud.com/api-mrs/zh-cn_topic_0013582897.html)。
#### 授权信息
账号具备所有API的调用权限，如果使用账号下的IAM用户调用当前API，该IAM用户需具备调用API所需的权限。
- 如果使用角色与策略授权，具体权限要求请参见[权限和授权项](https://support.huaweicloud.com/api-mrs/mrs_02_0221.html)。
- 如果使用身份策略授权，当前API调用无需身份策略权限。
 
#### URI
POST /v1.1/{project_id}/clusters/{cluster_id}/tags
表1路径参数 
| 参数         | 是否必选 | 参数类型   | 描述                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|:---|:---|:---|:---|
| cluster_id | 是    | String | **参数解释：** 集群ID。获取方法，请参见[获取集群ID](https://support.huaweicloud.com/api-mrs/mrs_02_9001.html#mrs_02_9001__zh-cn_topic_0264280065_section177891315153619)。 **约束限制：** 不涉及 **取值范围：** 只能由英文字母、数字以及"_"和"-"组成，不涉及单位，且长度为\[1-64\]个字符。 **默认取值：** 不涉及 |
| project_id | 是    | String | **参数解释：** 项目编号。获取方法，请参见[获取项目ID](https://support.huaweicloud.com/api-mrs/mrs_02_0011.html)。 **约束限制：** 不涉及 **取值范围：** 只能由英文字母和数字组成，不涉及单位，且长度为\[1-64\]个字符。 **默认取值：** 不涉及                                                                     |
   
#### 请求参数
表2请求Body参数 
| 参数  | 是否必选 | 参数类型                                         | 描述                                                                                                                                                                                                                                                                                                                    |
|:---|:---|:---|:---|
| tag | 是    | [Tag] object | **参数解释：** 集群标签。 **约束限制：** 不涉及 **取值范围：** 不涉及 **默认取值：** 不涉及 |
   
 表3Tag 
| 参数    | 是否必选 | 参数类型   | 描述                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
|:---|:---|:---|:---|
| key   | 是    | String | **参数解释：** 标签的键。 **约束限制：** 同一资源的key值不能重复。 **取值范围：** - 最大长度128个字符，不能为空字符串。   - 标签的key值可以包含任意语种字母、数字、空格和_.:=+-@，但首尾不能含有空格，不能以_sys_开头。    **默认取值：** 不涉及 |
| value | 是    | String | **参数解释：** 标签的值。 **约束限制：** 不涉及 **取值范围：** - 最大长度255个字符，可以为空字符串。   - 标签的value值可以包含任意语种字母、数字、空格和_.:=+-@，但首尾不能含有空格，不能以_sys_开头。    **默认取值：** 不涉及        |
   
#### 响应参数
**状态码：204**
指定集群的标签添加成功
无
#### 请求示例
给指定集群添加标签
```
POST /v1.1/{project_id}/clusters/{cluster_id}/tags
{
  "tag" : {
    "key" : "DEV",
    "value" : "DEV1"
  }
}
```
#### 响应示例
无
#### SDK代码示例
SDK代码示例如下。
- [Java]
  给指定集群添加标签
  ```
  package com.huaweicloud.sdk.test;
  import com.huaweicloud.sdk.core.auth.ICredential;
  import com.huaweicloud.sdk.core.auth.BasicCredentials;
  import com.huaweicloud.sdk.core.exception.ConnectionException;
  import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
  import com.huaweicloud.sdk.core.exception.ServiceResponseException;
  import com.huaweicloud.sdk.mrs.v1.region.MrsRegion;
  import com.huaweicloud.sdk.mrs.v1.*;
  import com.huaweicloud.sdk.mrs.v1.model.*;
  public class CreateClusterTagSolution {
      public static void main(String[] args) {
          // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
          // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
          String ak = System.getenv("CLOUD_SDK_AK");
          String sk = System.getenv("CLOUD_SDK_SK");
          String projectId = "{project_id}";
          ICredential auth = new BasicCredentials()
                  .withProjectId(projectId)
                  .withAk(ak)
                  .withSk(sk);
          MrsClient client = MrsClient.newBuilder()
                  .withCredential(auth)
                  .withRegion(MrsRegion.valueOf("<YOUR REGION>"))
                  .build();
          CreateClusterTagRequest request = new CreateClusterTagRequest();
          request.withClusterId("{cluster_id}");
          CreateTagReq body = new CreateTagReq();
          Tag tagbody = new Tag();
          tagbody.withKey("DEV")
              .withValue("DEV1");
          body.withTag(tagbody);
          request.withBody(body);
          try {
              CreateClusterTagResponse response = client.createClusterTag(request);
              System.out.println(response.toString());
          } catch (ConnectionException e) {
              e.printStackTrace();
          } catch (RequestTimeoutException e) {
              e.printStackTrace();
          } catch (ServiceResponseException e) {
              e.printStackTrace();
              System.out.println(e.getHttpStatusCode());
              System.out.println(e.getRequestId());
              System.out.println(e.getErrorCode());
              System.out.println(e.getErrorMsg());
          }
      }
  }
  ```
- [Python]
  给指定集群添加标签
  ```
  # coding: utf-8
  import os
  from huaweicloudsdkcore.auth.credentials import BasicCredentials
  from huaweicloudsdkmrs.v1.region.mrs_region import MrsRegion
  from huaweicloudsdkcore.exceptions import exceptions
  from huaweicloudsdkmrs.v1 import *
  if __name__ == "__main__":
      # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
      # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
      ak = os.environ["CLOUD_SDK_AK"]
      sk = os.environ["CLOUD_SDK_SK"]
      projectId = "{project_id}"
      credentials = BasicCredentials(ak, sk, projectId)
      client = MrsClient.new_builder() \
          .with_credentials(credentials) \
          .with_region(MrsRegion.value_of("<YOUR REGION>")) \
          .build()
      try:
          request = CreateClusterTagRequest()
          request.cluster_id = "{cluster_id}"
          tagbody = Tag(
              key="DEV",
              value="DEV1"
          )
          request.body = CreateTagReq(
              tag=tagbody
          )
          response = client.create_cluster_tag(request)
          print(response)
      except exceptions.ClientRequestException as e:
          print(e.status_code)
          print(e.request_id)
          print(e.error_code)
          print(e.error_msg)
  ```
- [Go]
  给指定集群添加标签
  ```
  package main
  import (
  "fmt"
  "github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
      mrs "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/mrs/v1"
  "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/mrs/v1/model"
      region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/mrs/v1/region"
  )
  func main() {
      // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
      // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
      ak := os.Getenv("CLOUD_SDK_AK")
      sk := os.Getenv("CLOUD_SDK_SK")
      projectId := "{project_id}"
      auth := basic.NewCredentialsBuilder().
          WithAk(ak).
          WithSk(sk).
          WithProjectId(projectId).
          Build()
      client := mrs.NewMrsClient(
          mrs.MrsClientBuilder().
              WithRegion(region.ValueOf("<YOUR REGION>")).
              WithCredential(auth).
              Build())
      request := &model.CreateClusterTagRequest{}
  request.ClusterId = "{cluster_id}"
  tagbody := &model.Tag{
  Key: "DEV",
  Value: "DEV1",
  }
  request.Body = &model.CreateTagReq{
  Tag: tagbody,
  }
  response, err := client.CreateClusterTag(request)
  if err == nil {
          fmt.Printf("%+v\n", response)
      } else {
          fmt.Println(err)
      }
  }
  ```
- [更多]
  更多编程语言的SDK代码示例，请参见[API Explorer](https://console.huaweicloud.com/apiexplorer/#/openapi/MRS/sdk?api=CreateClusterTag&version=v1)的代码示例页签，可生成自动对应的SDK代码示例。
#### 状态码
| 状态码 | 描述          |
|:---|:---|
| 204 | 指定集群的标签添加成功 |
   
#### 错误码
请参见[错误码](https://support.huaweicloud.com/api-mrs/ErrorCode.html)。
