PolarDB：Private domain names

Scenarios

You can bind a private domain name to each private endpoint of a PolarDB cluster. Private domain names take effect in only the VPC that you specify in the current region. Private domain names have a higher priority than global domain names in domain name resolution.

For example, the original domain name of a database is developer.aliyundoc.com, and the database is migrated to a PolarDB cluster. The endpoint of the PolarDB cluster is image.developer.aliyundoc.com. To retain the original domain name, you can create a CNAME record for the private domain name developer.aliyundoc.com and bind the domain name to image.developer.aliyundoc.com. After the domain name is bound to the endpoint, you can access the PolarDB cluster by visiting developer.aliyundoc.com in the specified VPC, as shown in the following figure.

Billing

The private domain name feature of PolarDB maps the private domain names that are managed by PrivateZone to the private endpoints of a PolarDB cluster. You are charged only a small amount of fees for PrivateZone. For more information, see Pricing.

Bind a private domain name

1. Log on to the PolarDB console.

2. In the left-side navigation pane, click Clusters.

3. In the upper-left corner, select the region where the cluster to which you want to connect is deployed.

4. Find the cluster and click its ID.

5. In the Database Connections section of the Basic Information page, click the icon in the upper-right corner to change the view.

6. Click Bind Private Domain Name next to the target private endpoint.

   

7. In the Bind Private Domain Name dialog box, specify the prefix and suffix of the private domain name.

   

   The format of the private domain name is <prefix>.<suffix>. The following table describes the format of the private domain names.

   Configuration	Description
   Prefix of a private domain name	The prefix of the private domain name must be 6 to 40 characters in length and can contain at least one of the following types of characters: lowercase letters, digits, and hyphens (-). The prefix must start with a letter and end with a digit or a letter.
   Suffix of the private domain name (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 where your PolarDB cluster resides is not in the configured zone, the system automatically binds the VPC to the zone. You can view and manage zones in the PrivateZone console.

   Note

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

8. Click OK.

9. In the Bind Private Domain Name dialog box, confirm the domain name information and click OK.

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