
# 创建资源标签 - CreateResourceTag
#### 功能介绍
为特定类型的资源创建标签。
#### 接口约束
- 一个资源上最多有20个标签。
  
- 此接口为幂等接口。
  
- 创建时，如果创建的标签已经存在（key相同），则覆盖。
  
 
#### 调用方法
请参见[如何调用API](https://support.huaweicloud.com/api-er/er_02_0008.html)。
#### 授权信息
账号根用户具备所有API的调用权限，如果使用账号下的IAM用户调用当前API，该IAM用户需具备如下身份策略权限，更多的权限说明请参见[权限和授权项](https://support.huaweicloud.com/api-er/er_02_0015.html)。
| 授权项                  | 访问级别  | 资源类型（\*为必须） | 条件键                                                                                                                                                                                                                                                                                                                                                           | 别名             | 依赖的授权项 |
|:---|:---|:---|:---|:---|:---|
| er:tags:singleCreate | Write | routeTables | - g:EnterpriseProjectId   - g:ResourceTag/\<tag-key\>    | er:tags:create | -      |
| er:tags:singleCreate | Write | instances   | - g:EnterpriseProjectId   - g:ResourceTag/\<tag-key\>    | er:tags:create | -      |
| er:tags:singleCreate | Write | attachments | - g:EnterpriseProjectId   - g:ResourceTag/\<tag-key\>    | er:tags:create | -      |
   
#### URI
POST /v3/{project_id}/{resource_type}/{resource_id}/tags
表1路径参数 
| 参数            | 是否必选 | 参数类型   | 描述                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|:---|:---|:---|:---|
| project_id    | 是    | String | 项目ID                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| resource_id   | 是    | String | 资源ID                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| resource_type | 是    | String | 标签资源类型: - instance: 企业路由器实例   - route-table: 路由表   - vpc-attachment: VPC连接   - vgw-attachment: 虚拟网关连接   - peering-attachment: 对等连接（Peering）连接   - vpn-attachment: VPN网关连接   - gdgw-attachment: 全域接入网关连接   - cfw-attachment: 云防火墙连接    |
   
#### 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 | 资源标签 |
   
 表3Tag 
| 参数    | 是否必选 | 参数类型   | 描述                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|:---|:---|:---|:---|
| key   | 否    | String | 标签键，规则： - 可用 UTF-8 格式表示的字母(包含中文)、数字和空格，以及字符：下划线"_"，点"."，冒号":"，等号"="，加号"+"，中划线"-"，"@"。   - _sys_开头属于系统标签，租户不能输入。   - 标签key不能为空（长度不能为0）。   - 长度在1-128之间。    最小长度：**1** 最大长度：**128** |
| value | 否    | String | 标签值，规则： - 可用 UTF-8 格式表示的字母(包含中文)、数字和空格，以及字符：下划线"_"，点"."，冒号":"，等号"="，加号"+"，中划线"-"，"@"。   - 资源标签值可以为空（empty or null）。   - 长度在0-255之间。    最小长度：**0** 最大长度：**255**                                                                                                                                                     |
   
#### 响应参数
**状态码：204**
No Content
无
#### 请求示例
为企业路由器资源添加标签，标签值为key1，标签键为value1
```
POST https://{erouter-endpoint}/v3/cfa563efb77d4b6d9960781d82530fd8/instance/3320166e-b937-40cc-a35c-02cd3f2b3ee2/tags
{
  "tag" : {
    "key" : "key1",
    "value" : "value1"
  }
}
```
#### 响应示例
无
#### SDK代码示例
SDK代码示例如下。
- [Java]
  为企业路由器资源添加标签，标签值为key1，标签键为value1
  ```
  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.er.v3.region.ErRegion;
  import com.huaweicloud.sdk.er.v3.*;
  import com.huaweicloud.sdk.er.v3.model.*;
  public class CreateResourceTagSolution {
      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);
          ErClient client = ErClient.newBuilder()
                  .withCredential(auth)
                  .withRegion(ErRegion.valueOf("<YOUR REGION>"))
                  .build();
          CreateResourceTagRequest request = new CreateResourceTagRequest();
          request.withResourceId("{resource_id}");
          request.withResourceType(CreateResourceTagRequest.ResourceTypeEnum.fromValue("{resource_type}"));
          CreateResourceTagRequestBody body = new CreateResourceTagRequestBody();
          Tag tagbody = new Tag();
          tagbody.withKey("key1")
              .withValue("value1");
          body.withTag(tagbody);
          request.withBody(body);
          try {
              CreateResourceTagResponse response = client.createResourceTag(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]
  为企业路由器资源添加标签，标签值为key1，标签键为value1
  ```
  # coding: utf-8
  import os
  from huaweicloudsdkcore.auth.credentials import BasicCredentials
  from huaweicloudsdker.v3.region.er_region import ErRegion
  from huaweicloudsdkcore.exceptions import exceptions
  from huaweicloudsdker.v3 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 = ErClient.new_builder() \
          .with_credentials(credentials) \
          .with_region(ErRegion.value_of("<YOUR REGION>")) \
          .build()
      try:
          request = CreateResourceTagRequest()
          request.resource_id = "{resource_id}"
          request.resource_type = "{resource_type}"
          tagbody = Tag(
              key="key1",
              value="value1"
          )
          request.body = CreateResourceTagRequestBody(
              tag=tagbody
          )
          response = client.create_resource_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]
  为企业路由器资源添加标签，标签值为key1，标签键为value1
  ```
  package main
  import (
  "fmt"
  "github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
      er "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/er/v3"
  "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/er/v3/model"
      region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/er/v3/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, err := basic.NewCredentialsBuilder().
          WithAk(ak).
          WithSk(sk).
          WithProjectId(projectId).
          SafeBuild()
      if err != nil {
          fmt.Println(err)
          return
      }
      hcClient, err := er.ErClientBuilder().
           WithRegion(region.ValueOf("<YOUR REGION>")).
           WithCredential(auth).
           SafeBuild()
      if err != nil {
          fmt.Println(err)
          return
      }
      client := er.NewErClient(hcClient)
      request := &model.CreateResourceTagRequest{}
  request.ResourceId = "{resource_id}"
  request.ResourceType = model.GetCreateResourceTagRequestResourceTypeEnum().RESOURCE_TYPE
  keyTag:= "key1"
  valueTag:= "value1"
  tagbody := &model.Tag{
  Key: &keyTag,
  Value: &valueTag,
  }
  request.Body = &model.CreateResourceTagRequestBody{
  Tag: tagbody,
  }
  response, err := client.CreateResourceTag(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/ER/sdk?api=CreateResourceTag)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 | No Content |
   
#### 错误码
请参见[错误码](https://support.huaweicloud.com/api-er/ErrorCode.html)。
