Call the ARMS API over the internal network

Usage notes

• You can configure PrivateZone only for regions that contain VPC-connected ECS instances. You cannot configure PrivateZone across regions.
• We recommend that you use custom images that have Alibaba Cloud CLI or SDK deployed to create ECS instances. Otherwise, the ECS instances cannot load related dependencies without Internet access.
• The following table describes the ARMS endpoints that support PrivateZone. Make sure that you use an endpoint listed in the table.

  Alibaba Cloud region	Region ID	CNAME record	Endpoint
  China (Hangzhou)	cn-hangzhou	popunify-vpc.cn-hangzhou.aliyuncs.com	arms.cn-hangzhou.aliyuncs.com
  China (Shanghai)	cn-shanghai	popunify-vpc.cn-shanghai.aliyuncs.com	arms.cn-shanghai.aliyuncs.com
  China (Qingdao)	cn-qingdao	popunify-vpc.cn-qingdao.aliyuncs.com	arms.cn-qingdao.aliyuncs.com
  China (Beijing)	cn-beijing	popunify-vpc.cn-beijing.aliyuncs.com	arms.cn-beijing.aliyuncs.com
  China (Shenzhen)	cn-shenzhen	popunify-vpc.cn-shenzhen.aliyuncs.com	arms.cn-shenzhen.aliyuncs.com
  China (Zhangjiakou)	cn-zhangjiakou	popunify-vpc.cn-zhangjiakou.aliyuncs.com	arms.cn-zhangjiakou.aliyuncs.com
  China (Hong Kong)	cn-hongkong	popunify-vpc.cn-hongkong.aliyuncs.com	arms.cn-hongkong.aliyuncs.com
  Singapore (Singapore)	ap-southeast-1	popunify-vpc.ap-southeast-1.aliyuncs.com	arms.ap-southeast-1.aliyuncs.com

Procedure

1. Log on to the Alibaba Cloud DNS console.
2. In the left-side navigation pane, click PrivateZone. On the PrivateZone page, click Add Zone.
3. In the Add PrivateZone dialog box, set the following parameters and click OK.
   • Zone Name: Enter an ARMS endpoint that supports PrivateZone. In this example, enter arms.cn-hangzhou.aliyuncs.com.
   • Subdomain recursive resolution proxy: If you select this option, when you query the subdomain names that are not configured in the zone namespace in the VPC, PrivateZone recursively resolves the subdomain names on the Internet. PrivateZone uses the recursive resolution result as the DNS response to your query and returns this response to the VPC.

   
4. On the PrivateZone page, find the created private zone in the zone list and click Configure in the Actions column.
5. On the Resolution Settings page, click the Resolution Settings tab. On the Resolution Settings tab, click Add Record.
6. In the Add Record dialog box, set the following parameters and click OK.
   • Record Type: Select CNAME.
   • Resource Records: Enter @ to resolve the @.example.com domain name.
   • Record Value: Enter the CNAME record of the corresponding region. For more information, see Usage notes.
   • TTL value: the time period during which recursive DNS caches the domain name resolution results. In this example, select 1 minute.

   
7. On the PrivateZone page, find the created private zone and click Bind VPC in the Actions column.
8. In the Bind VPC panel, select the same region as the created private zone, select the VPC where your ECS instance is located, and then click Confirm. You can select multiple VPCs.
   

Verify the result

After you associate the VPC with the created private zone, you can log on to your ECS instance to check whether this ECS instance can access the ARMS endpoint of the corresponding region. For more information, see Connect to a Linux instance by using password authentication.

arms.cn-hangzhou.aliyuncs.com is used in this example. Run the ping command to test the status of packet sending and receiving.

ping arms.cn-hangzhou.aliyuncs.com

If a result similar to the following content appears, your ECS instance can access the ARMS endpoint of the corresponding region.