If you want to use Alibaba Cloud CDN to accelerate content delivery for a specified website, you must add the domain name that you want to accelerate to Alibaba Cloud CDN. After you add a domain name to be accelerated to Alibaba Cloud CDN, the system pushes the configuration of the domain name to all edge nodes without affecting the services of the domain name.
For more information about the health check policies on origin servers, see Configure a health check policy for an origin server.
- An origin server with stable performance is deployed.
Note If the accelerated region is Mainland China Only or Global, you must apply for an Internet Content Provider (ICP) number for the domain name. If the domain name does not have an ICP number, you can apply for an ICP number in Alibaba Cloud ICP Filing System.
- Alibaba Cloud CDN is activated. For more information, see Activate Alibaba Cloud CDN.
Step 1: Complete basic settings and specify business information
- Log on to the Alibaba Cloud CDN console.
- In the left-side navigation pane, click Domain Names.
- Click Add Domain Name and set the following parameters. Note The first time a domain name is added to Alibaba Cloud CDN, Alibaba Cloud CDN must verify the ownership of the domain name. Alibaba Cloud CDN verifies the ownership only of the root domain name. For more information, see Verify the ownership of a domain name. If the root domain name has already passed ownership verification, ignore this message.
|Domain Name to Accelerate||
Notice The business type cannot be modified after it is set. Proceed with caution.
Step 2: Configure an origin server
- After you complete the basic settings and specify business information, click Add Origin Server.
- In the Add Origin Server dialog box, set the following parameters.
Parameter Description Origin Info
Select the type of the origin server and enter the address of the origin server.
- Address length: The address of an origin server cannot exceed 67 characters in length.
- Maximum number of origin servers: You can set a maximum of 20 origin server addresses for each accelerated domain name.
- OSS Domain Name
Note Discounts for data transfer between Alibaba Cloud CDN and OSS:
- If you use an Object Storage Service (OSS) bucket as the origin server, you can enter
the public endpoint of the OSS bucket, for example,
***.oss-cn-hangzhou.aliyundoc.com. Internal endpoints of OSS buckets are not supported.
- To view the public endpoint of an OSS bucket, log on to the OSS console. You can also select the endpoint of an OSS bucket that belongs to the current Alibaba Cloud account from the Domain Name drop-down list.
- If you want OSS to identify network traffic sent from Alibaba Cloud CDN and apply for a discount on the data transfer, you must set the origin server type to OSS Domain in the Alibaba Cloud CDN console.
- If you set the origin server type to Site Domain in the Alibaba Cloud CDN console, OSS identifies network traffic sent from Alibaba Cloud CDN as outbound data transfer over the Internet. In this case, the discounts do not apply.
For more information, see Billing of OSS content acceleration.
- If you use an Object Storage Service (OSS) bucket as the origin server, you can enter the public endpoint of the OSS bucket, for example,
- IP: Enter the public IP addresses of one or more servers. Public IP addresses of Alibaba Cloud Elastic Compute Service (ECS) instances do not need to be reviewed.
- Site Domain: Enter the domain names of one or more origin servers.
- The origin domain name must be different from the accelerated domain name. Otherwise, a DNS resolution loop occurs, and requests cannot be redirected to the origin server.
- The format of the origin domain name:
- The domain name must be 1 to 67 characters in length,
- and can contain lowercase letters, digits, and hyphens (-). Example: example.com.
- The domain name cannot contain Chinese characters, uppercase letters, or characters other than hyphens (-). The domain name cannot be a hyphen (-). A hyphen (-) in a domain name cannot be followed by another hyphen (-). The domain name cannot start or end with a hyphen (-). If the domain name contains Chinese characters such as 阿里云.网址, you must apply for an ICP number for the domain name in Chinese characters, and use the tool Punycode to convert the domain name from Chinese characters to English letters, such as xn--fiq****.xn--eq****. Then, you can specify it as the domain name to be accelerated.
- You cannot add the IP address of an Alibaba Cloud Application Load Balancer (ALB)
instance, for example,
example.hangzhou.alb.aliyuncs.com, as the IP address of an origin server. However, you can configure a CNAME record for an ALB instance to resolve a service domain name, for example,
origin.example.com, to the address of an ALB instance. For more information, see Configure a CNAME record. Then, set the service domain name to domain name of the origin server that is accelerated by Alibaba Cloud CDN.
- Function Compute Domain: Enter a Function Compute domain name that belongs to the current Alibaba Cloud account. You must set the Region and Domain Name parameters for the Function Compute domain name. For more information, see Configure a custom domain name.
You can set priorities to specify primary and secondary origin servers. The primary origin server has a higher priority than the secondary origin servers. Alibaba Cloud CDN preferentially redirects requests to the primary origin server. If a fault occurs on the primary origin server, requests are redirected to the secondary origin server. The priority ranges from 0 to 127. A smaller value indicates a higher priority. By default, the priority of the primary origin server is 20, and the priority of the secondary origin server is 30. If you want to set the priority to other values, Submit a ticket.
For example, you have specified two origin servers: Origin Server A and Origin Server B. Origin Server A is the primary origin server and Origin Server B is the secondary origin server. In this case, Alibaba Cloud CDN preferentially redirects requests to Origin Server A. If Origin Server A fails, Alibaba Cloud CDN redirects user requests to Origin Server B. After Origin Server A recovers, Alibaba Cloud CDN redirects user requests to Origin Server A.
WeightIf origin servers have the same priority, Alibaba Cloud CDN redirects requests to the origin servers based on their weights. This balances loads among the origin servers. You can specify a weight based on your business requirements.
- The valid values of origin server weights range from 1 to 100. A greater value indicates a higher weight. An origin server with a higher weight receives more user requests.
- The default value is 10.
For example, both Origin Server A and Origin Server B are specified as primary origin servers. The weight of Origin Server A is 80 and the weight of Origin Server B is 20. In this case, Alibaba Cloud CDN redirects user requests to both origin servers at a ratio of 8:2.
PortSpecify a port on the origin server to process requests. The default port is port 80. You can specify a port based on the settings of your origin server. Valid values are 1 to 65535.
- Default value: 80.
- If you specify port 443, requests are redirected to the origin server over HTTPS. If you specify port 80 or a custom port, requests are redirected to the origin server over HTTP.
- If you want Alibaba Cloud CDN to redirect HTTPS requests to origin servers over custom ports, Submit a ticket.
- If Origin Protocol Policy is enabled, custom ports do not take effect. For more information about how to disable the origin protocol policy, see Configure the origin protocol policy.
- If the origin server is an Object Storage Service (OSS) bucket, OSS determines whether you can specify a custom port.
- After the configuration is complete, click OK.
- Optional:You can repeat the preceding steps to add more origin servers.
Step 3: Complete ownership verification
- After you add an origin server, click Next.
- Wait for manual verification. Note If the domain name does not need to be manually verified, proceed to the next step. In the next step, you can set the parameters based on your business requirements.
It takes one to two business days to complete the verification. If you require prioritized verification, Submit a ticket.
After the domain name passes the verification, the status of the domain name changes to Enabled. In this case, the domain name is added to Alibaba Cloud CDN.
Configure a health check policy for an origin server
CDN edge nodes provide Layer 4 (TCP) health checks on origin servers. CDN edge nodes perform health checks on origin servers to check the availability of the origin servers in case back-to-origin routing fails.
- Probes are sent to IP addresses. If the address of an origin server is a domain name, Alibaba Cloud CDN accesses the secondary origin server only if all the IP addresses that belong to the domain name are unavailable.
- Probes automatically skip origin servers that are in the dead table.
What to do next
Add a CNAME record for a domain name: After a domain name is added to Alibaba Cloud CDN, Alibaba Cloud CDN assigns a CNAME to the domain name. You must add a CNAME record for the domain name before CDN acceleration can take effect.
- Configure system-recommended features (optional): You can set cache expiration rules and bandwidth caps, increase cache hit ratios, reinforce protection, and improve content delivery performance.
- Test whether a domain name is accessible (optional): You can perform this operation to ensure that DNS updates do not affect the services of your website.
Related API operations
|Adds domain names|
|Verify domain name ownership|