PolarDB:Private domain name

Scenarios

You can bind a private domain name to each private endpoint of PolarDB. The private domain name is effective only in the specified VPC within the current region. Private domain names have a higher priority than global domain names and are parsed first.

For example, the original domain name of your database is developer.aliyundoc.com. You migrate the database to a PolarDB cluster. The endpoint of the PolarDB cluster is image.developer.aliyundoc.com. To continue using the original domain name, you can create a private domain name to bind developer.aliyundoc.com to image.developer.aliyundoc.com using a canonical name (CNAME) record. After the binding is successful, you can access the PolarDB cluster by accessing developer.aliyundoc.com in the specified VPC, as shown in the following figure.

Billing

The private domain name feature of PolarDB works by mapping a private domain name managed by PrivateZone to a private endpoint of PolarDB. PrivateZone charges a small fee. For more information, see Billing.

Bind a private domain name

1. Log on to the PolarDB console. In the navigation pane on the left, click Clusters, select the region of the cluster, and then click the ID of the destination cluster to go to its product page.

2. On the Basic Information page, in the Database Connections section, click the icon in the upper-right corner to switch the view.

3. Click Bind Private Domain Name to the right of the destination private endpoint.

4. In the Bind Private Domain Name dialog box, enter the prefix and suffix of the private domain name. The format of a private domain name is <Prefix>.<Suffix>. For more information, see the following table:

   

   Configuration	Description
   Private domain name prefix	The prefix must be 6 to 40 characters in length. It must start with a letter and end with a digit or letter. It can contain lowercase letters, digits, and hyphens (-).
   Private domain name suffix (Zone)	You can select an existing zone from the drop-down list or enter a new zone. For more information about zones, see PrivateZone. Note If the VPC that contains the PolarDB cluster is not in the configured zone, the system automatically attaches the VPC to the zone. You can view and manage zones in the Alibaba Cloud DNS console.

   Note

   When you bind a private domain name, the system automatically creates a service-linked role (AliyunServiceRoleForPolarDB). For more information, see Service-linked role for PolarDB.

5. Click OK.

6. In the Bind Private Domain Name dialog box, confirm that the domain name information is correct, and then click OK.

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