Adding a CNAME Record Set¶
Scenarios¶
If you want to map one domain name to another, add a CNAME record set for the domain name.
For more details, see Record Set Types and Configuration Rules.
Constraints¶
You can leave the Name parameter blank when adding a CNAME record set.
You cannot create a CNAME record set with the same name and resolution line as an NS record set.
Procedure¶
Log in to the management console.
In the service list, choose Network > Domain Name Service.
The DNS console is displayed.
In the navigation pane, choose Public Zones or Private Zones.
The zone list is displayed.
(Optional) If you have selected Private Zones, click
on the upper left corner to select the region and project.Click the domain name.
Click Add Record Set.
The Add Record Set dialog box is displayed.
Configure the parameters based on Table 1.
Table 1 Parameters for adding a CNAME 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.
The Name field cannot be set to an at sign (@). Just leave it blank.
abc: The domain name is abc.example.com, a subdomain of example.com.
mail: The domain name is mail.example.com, which is typically used for email servers.
*: The domain name is *.example.com, which is a wildcard domain name, indicating all subdomains of example.com.
Left blank
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.
CNAME - Map one domain to another
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 is 300.
If your service address changes frequently, set TTL to a smaller value.
300
Value
Domain name alias. You can enter only one domain name.
webserver01.example.com
Tag
(Optional) Identifier of a record set. Each tag contains a key and a value. You can add a maximum of 20 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.
You can enter a maximum of 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 a maximum of 36 characters.
Can contain only letters, digits, hyphens (-), at signs (@), and underscores (_).
example_key1
Value
Cannot be left blank.
Can contain a maximum of 43 characters.
Can contain only letters, digits, hyphens (-), at signs (@), and underscores (_).
example_value1
Click OK.
Switch back to the Record Sets tab.
The added record set is in the Normal state.