tencent cloud

Advanced origin-Pull configurations

Tencent Cloud CDN allows you to configure fine-grained origin-pull based on origin-pull rules, such as path-based rules (i.e., specifying a file type, folder, full file path, or homepage for origin-pull) and client IP region-based rules.

Restrictions

By default, the origin-pull protocol and origin domain of the primary origin server are adopted for the advanced origin-pull configuration and cannot be modified.

Configuration Guide

Configuration in domain management

1. Log in to the CDN console.
2. Click Domain Management on the left sidebar to enter the domain name management list.
3. Select the target domain name and click Manage to enter the domain name configuration page.
4. On the Baisc information tab, find the Origin server section and click Edit in the top-right corner of the Primary origin section.
   
5. Click Advanced origin-pull configuration.
   
6. Set the configuration items in the Advanced origin-pull configuration section as described in the following table.

Configuration limitations

• Each domain name can be configured with up to 50 rules.
• The origin-pull address of a single rule can be an IP, domain name, and port (range: 0 - 65535; port can be omitted). If "HTTPS" or "Follow Protocol" is selected as the origin-pull protocol, the port should be 443 or left empty.
• More actions: you can adjust rule priority and edit or delete multiple rules in batches.

Rule priorities

First, the priority of a client IP rule is lower than that of a path-based rule. Second, if multiple path-based rules are specified, rules at lower positions in the rule list have higher priorities.
For example, you have specified that origin-pull requests of clients from the Jiangsu region are forwarded to 1.1.1.1 and origin-pull requests for files whose path contains /test are forwarded to 2.2.2.2. When a client from the Jiangsu region accesses /test, the origin-pull request is forwarded to 2.2.2.2.

Sample configuration

Example:
This example describes three origin-pull scenarios, assuming that you have configured www.example.com as the CDN acceleration domain name, with the advanced origin-pull rules configured as shown in the following figure:

Scenario 1: A client from the Shanghai region accesses http://www.example.com/vod/. In this case, the origin-pull request hits the File directory rule and is forwarded to 1.1.1.3.
Scenario 2: A client from the Guangdong region accesses http://www.example.com/. In this case, the origin-pull request hits both the Homepage rule and the Client IP rule. As the Homepage rule has a higher priority, the origin-pull request is forwarded to 1.1.1.5.
Scenario 3: A client from the Guangdong region accesses http://www.example.com/image/1.jpg. In this case, the origin-pull request hits the File extension, Full path, and Client IP rules at the same time. As a path-based rule has a higher priority over an IP-based rule, and the Full path rule is listed lower than the File extension rule, the origin-pull request is forwarded to 1.1.1.4.