Adding an A Record Set

Scenarios

If you want to use a private domain name to access ECSs configured with IPv4 addresses, you can add an A record set for the domain name.

For more information about each type of record sets, see Record Set Types and Configuration Rules.

Prerequisites

You have an ECS and obtained an IPv4 address.

Procedure

1. Log in to the management console.
2. In the service list, choose Network > Domain Name Service.

   The DNS console is displayed.

3. In the navigation pane on the left, choose Private Zones.

   The zone list is displayed.

4. Click on the upper left and select the desired region and project.
5. Locate the zone and click Manage Record Set in the Operation column.
6. Click Add Record Set.

   The Add Record Set dialog box is displayed.

7. Configure the parameters based on Table 1.

   Table 1 Parameters for adding an A record set

   Parameter	Description	Example Value
   Name	Prefix of the domain name to be resolved. For example, if the domain name is example.com, the prefix can be as follows: www: The domain name is www.example.com, which is usually used for a website. Left blank: The domain name is example.com. To use an at sign (@) as the domain name prefix, just leave this parameter blank. abc: The domain name is abc.example.com, a subdomain of example.com. mail: The domain name is mail.example.com, which is usually used for email servers. *: The domain name is *.example.com, which is a wildcard domain name, indicating all subdomains of example.com.	www
   Type	Type of the record set. A message may be displayed indicating that the record set you are trying to add conflicts with an existing record set.	A – Map domains to IPv4 addresses
   TTL (s)	Cache duration of the record set on a local DNS server, in seconds. The value ranges from 1 to 2147483647, and the default value is 300. If your service address changes frequently, set TTL to a smaller value.	300
   Value	IPv4 addresses mapped to the domain name. You can enter up to 50 values, each on a separate line.	192.168.12.2 192.168.12.3
   Tag	(Optional) Identifier of the record set. Each tag contains a key and a value. You can add up to 10 tags to a record set. For details about tag key and value requirements, see Table 2.	example_key1 example_value1
   Description	(Optional) Supplementary information about the record set. The description can contain no more than 255 characters.	-

   Table 2 Tag key and value requirements

   Parameter	Requirements	Example Value
   Key	Cannot be left blank. Must be unique for each resource. Can contain no more than 36 characters. Cannot start or end with a space nor contain special characters =*<>\,|/	example_key1
   Value	Cannot be left blank. Can contain no more than 43 characters. Cannot start or end with a space nor contain special characters =*<>\,|/	example_value1

8. Click OK.
9. Switch back to the Record Sets tab.

   The added record set is in the Normal state.

Related Operations

For details about how to configure A record sets, see Configuring Private Domain Name Resolution for ECSs.