Help Center/ Object Storage Service/ User Guide/ Domain Name Management/ Accessing a Bucket Using a CDN Acceleration Domain Name
Updated on 2025-09-15 GMT+08:00
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Accessing a Bucket Using a CDN Acceleration Domain Name

Scenarios

More and more companies in various industries use OBS to store static resource files such as images, videos, and software packages, and use OBS as the storage source for websites, forums, apps, and games. These static resources can be obtained by accessing OBS through URLs. Generally, files are stored in only one region. If you access OBS far away from the region where files are stored, the response speed may be slow. In scenarios where frequent access is required, accessing OBS to obtain files consumes a large amount of traffic.

To improve the speed and stability for accessing static resource files, you can use CDN acceleration. If you have configured a user-defined domain name for a bucket, you can directly enable CDN acceleration for the domain name. If you have not configured a user-defined domain name for the bucket, you can configure a CDN acceleration domain name.

CDN acceleration applies to the following scenarios:

  • Website acceleration

    When static resources (such as images and files) on portals, e-commerce platforms, or user-generated content (UGC) apps are accessed by large or globally distributed user bases, CDN acceleration can make the responses faster.

  • Download acceleration

    CDN acceleration enables higher bandwidth and faster transmission, which reduces the time required for downloading files from websites, game clients, or app stores.

  • On-demand service acceleration

    In scenarios, such as online education and video sharing, that offer video on demand (VOD) and audio on demand (AOD) services, CDN acceleration can minimize playback buffering.

For details, see Application Scenarios.

Billing for CDN-Accelerated Access to OBS

If you use Huawei Cloud CDN to accelerate access to the data stored in OBS, you will be billed for using both OBS and CDN.

Figure 1 shows how and what costs are generated.

Figure 1 Using CDN to access OBS

Table 1 describes the billing items in detail.

Table 1 Billing items for accessing OBS via CDN acceleration

Billing Item

Billing Party

Description

Billing Mode

Requests

OBS

When you attempt to access data the first time, a CDN edge PoP will send requests to pull data from the origin server (OBS). OBS bills you for the requests, also the number of API calls.

Pay-per-Use

CDN pull traffic

OBS

Pull traffic generated when the origin server (OBS 3.0 bucket) returns data and caches it on the CDN edge PoP. If Direct Connect is used, the price will be different. For details, see Product Pricing Details.

Such traffic is only generated for OBS 3.0 buckets. If data is pulled from OBS 2.0 buckets, the data is directly transferred out over the Internet.

Pay-per-Use

CDN traffic

CDN

Outbound traffic generated when you access a CDN edge PoP. For details, see Billing by Traffic.

Pay-per-Use

Resource packages (prepaid CDN traffic packages)

Principles

Accessing OBS without CDN acceleration: Files are stored in only one region. Therefore, when a client accesses OBS far away from the region, the response speed may be slow.

Accessing OBS with CDN acceleration: When a client initiates a request, CDN searches for the CDN PoP that responds the fastest to the domain name and checks whether the CDN PoP has already cached the data requested by the client.

  • If cached, the CDN PoP returns the data to the client.
  • If not, the CDN PoP pulls the data from OBS, returns the data to the client, and caches the data on itself.

The CDN acceleration service can speed up response and improve user experience at low costs.

The following explains how a client accesses OBS without and with CDN acceleration.

Figure 2 shows the process of accessing OBS directly from clients without CDN acceleration.

Figure 2 Process of obtaining data from OBS

When a client initiates a request, CDN searches for the CDN PoP that responds the fastest to the domain name and detects that the requested data is not cached on the PoP. Then, the CDN PoP pulls the data from OBS, returns the data to the client, and caches the data on itself. Figure 3 shows the request process.

Figure 3 Accessing OBS with CDN acceleration (without cached data on the CDN PoP)

When a client initiates a request, CDN searches for the CDN PoP that responds the fastest to the domain name and detects that the requested data is cached on the PoP. Then, the CDN PoP returns the data to the client, without pulling data from OBS. Figure 4 shows the request process.

Figure 4 Accessing OBS with CDN acceleration (with cached data on the CDN PoP)

Constraints

Only buckets whose version is 3.0 or later support CDN acceleration. To check the version of a bucket, go to OBS Console, click the bucket name to go to the Overview page, and find the version in the Basic Information area.

Configuring an Acceleration Domain Name

You can only use OBS Console to configure acceleration domain names.

To configure an acceleration domain name on OBS Console, perform the following steps:

  1. Bind an acceleration domain name to the bucket.
  2. Add a CNAME record set to map the acceleration domain name to the default domain name of the bucket.

Step 1: Bind an Acceleration Domain Name

  1. In the navigation pane of OBS Console, choose Object Storage.
  2. In the bucket list, click the bucket you want to operate. The Objects page is displayed.
  3. In the navigation pane, choose Basic Configurations > Domain Name Mgmt.

    Figure 5 Domain name management page

  4. In the upper part of the page, click Configure Acceleration Domain Name.

    If no user-defined domain names are bound, you also can click Configure Acceleration Domain Name in the lower part of the page.

    If CDN has not been enabled, a dialog box is displayed after you click Configure Acceleration Domain Name. Enable CDN as prompted.

    Figure 6 Configuring an acceleration domain name

  5. Configure parameters by referring to Table 2.

    Table 2 Parameters for adding an acceleration domain name

    Parameter

    Value

    Description

    Example Value

    Origin Server

    -

    The origin server (the default domain name of the OBS bucket that stores the requested resources) that is accessed by the client using the acceleration domain name

    This parameter is displayed by default and requires no configuration.

    -

    Service Area

    Chinese mainland

    If you select Chinese mainland, all requests are scheduled to CDN PoPs in the Chinese mainland. The acceleration domain name must be licensed by the MIIT. For details, see ICP Filing Process.

    Worldwide

    Outside of Chinese mainland

    If you select Outside of Chinese mainland, all requests are scheduled to CDN PoPs outside the Chinese mainland. You do not need to apply for a license for the acceleration domain name from the MIIT.

    Worldwide

    If you select Worldwide, worldwide requests are scheduled to the nearest, optimal CDN PoP. The acceleration domain name must be licensed by the MIIT. For details, see ICP Filing Process.

    Business Type

    Websites

    When static resources (such as images and files) on portals, e-commerce platforms, or user-generated content (UGC) apps are accessed by large or globally distributed user bases, CDN acceleration can make the responses faster.

    Websites

    Downloads

    CDN acceleration enables higher bandwidth and faster transmission, which reduces the time required for downloading files from websites, game clients, or app stores.

    Video on demand

    In scenarios, such as online education and video sharing, that offer video on demand (VOD) and audio on demand (AOD) services, CDN acceleration can minimize playback buffering.

    Acceleration

    -

    The user-defined domain name to be accelerated

    • The domain name:
      • Must start with an asterisk (*), a letter, or a digit.
      • Can contain letters, digits, hyphens (-), and periods (.).
      • Can have a suffix of 2 to 6 uppercase or lowercase letters, for example, .com and .cn.
    • The ownership of the domain name must be verified.

      To prevent domain names from being maliciously added, you need to verify the ownership of the domain name the first time you connect a domain name to CDN. For details, see Verifying the Domain Name Ownership.

    • You can add up to five domain names at a time.
      NOTE:

      If you want to choose one of the existing Huawei Cloud domain names from the drop-down list on OBS Console, you must have the Domains:domains:getDetails permission. You can contact the administrator to use IAM to grant you this permission. For details, see Assigning Permissions to an IAM User.

    static.example.com

    Static Website Hosting

    -

    You can upload static website files to your OBS bucket and grant anonymous users the read permission for these files, and then configure static website hosting for the bucket, so that OBS can host your static website. For details, see Static Website Hosting.

    • If you have configured static website hosting for your OBS bucket, select Enable for Static Website Hosting. This way, when you access a single static file in the bucket, OBS does not list all files in the bucket.

      You also need to select Static website hosting on the origin server settings page of the CDN console. For details, see Why Are All Files in the Bucket Displayed When Users Request a File from an OBS Bucket Connected to CDN?

    • If static website hosting is not configured for your OBS bucket, do not enable this option. Otherwise, services will be abnormal.

    -

  6. Click OK.

Step 2: Add a CNAME Record Set

Add a CNAME record set to map the user-defined domain name to the default domain name of the bucket.

  1. Click Resolve to automatically add a CNAME record set.

    • If you specified a Huawei Cloud domain name, click Resolve for DNS to add a CNAME record set.
    • If you specified a domain name that is not registered with Huawei Cloud, skip this step and go to 2.

  2. Manually add a CNAME record set.

    • If you are not using a Huawei Cloud domain name, follow the CNAME resolution guide provided by your DNS provider.
    • If you are using a Huawei Cloud domain name, do as follows:
      1. Log in to the DNS console.
      2. In the navigation pane, choose Public Zones.
      3. (Optional) Create a public zone. If you have already created one, skip this step.
        1. On the Public Zones page, click Create Public Zone in the upper right corner.
        2. Configure parameters by referring to the following table. Retain the default settings for other parameters.
          Table 3 Parameters for creating a public zone

          Parameter

          Example Value

          Description

          Domain Name

          example.com

          The domain name purchased from a domain name registrar

          Enter the user-defined domain name bound to the bucket here.

          Enterprise Project

          default

          The enterprise project to be associated with the public zone. You can manage public zones by enterprise project.

          This parameter is available and mandatory only when you are using an enterprise account.

          Notes:

          • If you do not manage zones by enterprise project, select the default enterprise project.
          • If you manage zones by enterprise project, select another existing enterprise project.

            To create an enterprise project, see Creating an Enterprise Project.
        3. Click OK.
      4. Locate the row that contains the domain name to which you want to add a record set and click the domain name.
      5. On the Record Sets tab, click Add Record Set.
      6. Configure parameters by referring to Table 4. Keep the default settings for the parameters that are not listed in the following table.
        For details, see Adding a CNAME Record Set.
        Table 4 Parameters for adding a CNAME record set

        Parameter

        Example Value

        Description

        Type

        CNAME – Map one domain to another

        Choose a record set type depending on the purpose of the domain name.

        Select CNAME – Map one domain to another here.

        A message may be displayed, indicating that the record set you are trying to add conflicts with an existing record set of the zone.

        For details, see Why Is a Message Indicating Conflict with an Existing Record Set Displayed When I Add a Record Set?

        Name

        Leave it blank.

        The prefix of the domain name to be resolved

        For example, if the domain name is example.com, its prefix can be:

        • www: used for website resolution. The domain name to be resolved is www.example.com.
        • Left blank: used for website resolution. The domain name to be resolved is example.com.

          To use an at sign (@), leave this parameter blank.

        • abc: The domain name to be resolved is abc.example.com, a subdomain of example.com.
        • mail: The domain name to be resolved is mail.example.com.
        • *: The domain name to be resolved is *.example.com, any subdomain of example.com.

        Line

        Default

        Resolution line. The DNS server will return the IP address of the specified line, depending on where the visitor comes from.

        The default value is Default.

        This parameter can only be configured for public zone record sets.

        • Default: returns the default resolution result irrespective of where the visitors come from.
        • ISP: returns the resolution result based on visitors' carrier networks. For details, see Configuring ISP Lines.
        • Region: returns the resolution result based on visitors' geographical locations. For details, see Configuring Region Lines.
        • Custom line: returns a specific IP address based on the IP address range of visitors. For details, see Configuring Custom Lines.

        TTL (s)

        300

        The length of time (in seconds) for which a local DNS server caches a record set

        The default value is 300 (value range: 1 to 2147483647).

        If your service address changes frequently, set TTL to a smaller value. Otherwise, set TTL to a larger value.

        For more information about TTL, see What Is TTL?

        Value

        example-bucket.obs.cn-north-4.myhuaweicloud.com

        Domain name alias. You can enter only one domain name.

        • If CDN acceleration is not used, set this parameter to the bucket domain name.
        • If CDN acceleration is used, set this parameter to the domain name specified in the CNAME record allocated by CDN.
      7. Click OK.
      8. Verify that the added CNAME record set is in effect.

        Open the Windows command line interface and run the following command:

        nslookup -qt=cname User-defined domain name or CDN acceleration domain name configured for the bucket
        • Without CDN acceleration: If the output is the bucket domain name, the CNAME record set is in effect.
        • With CDN acceleration: If the output is the CNAME domain name allocated by CDN, the CNAME record set is in effect.

After the domain name is configured, CDN acceleration is not applied immediately. Refresh the domain name list to check the status. CDN acceleration is in effect only when the CNAME status is Enabled.

Enabling Acceleration for a User-Defined Domain Name

You can use OBS Console to enable acceleration for a user-defined domain name that has been configured for the bucket.

To enable acceleration, perform the following steps:

  1. Enable acceleration for the bound user-defined domain name.
  2. Add a CNAME record set to map the acceleration domain name to the default domain name of the bucket.

Step 1: Enable Acceleration

  1. In the domain name list, locate the card of the bound domain name and click Enable next to Acceleration disabled.
  2. Configure parameters by referring to Table 5.

    Table 5 Acceleration domain name parameters

    Parameter

    Value

    Description

    Example Value

    Origin Server

    -

    The origin server (the default domain name of the OBS bucket that stores the requested resources) that is accessed by the client using the acceleration domain name

    This parameter is displayed by default and requires no configuration.

    -

    Service Area

    Chinese mainland

    If you select Chinese mainland, all requests are scheduled to CDN PoPs in the Chinese mainland. The acceleration domain name must be licensed by the MIIT. For details, see ICP Filing Process.

    Worldwide

    Outside of Chinese mainland

    If you select Outside of Chinese mainland, all requests are scheduled to CDN PoPs outside the Chinese mainland. You do not need to apply for a license for the acceleration domain name from the MIIT.

    Worldwide

    If you select Worldwide, worldwide requests are scheduled to the nearest, optimal CDN PoP. The acceleration domain name must be licensed by the MIIT. For details, see ICP Filing Process.

    Business Type

    Websites

    When static resources (such as images and files) on portals, e-commerce platforms, or user-generated content (UGC) apps are accessed by large or globally distributed user bases, CDN acceleration can make the responses faster.

    Websites

    Downloads

    CDN acceleration enables higher bandwidth and faster transmission, which reduces the time required for downloading files from websites, game clients, or app stores.

    Video on demand

    In scenarios, such as online education and video sharing, that offer video on demand (VOD) and audio on demand (AOD) services, CDN acceleration can minimize playback buffering.

    Acceleration

    -

    The user-defined domain name to be accelerated

    This parameter is displayed by default and requires no configuration.

    To prevent domain names from being maliciously added, you need to verify the ownership of the domain name the first time you connect a domain name to CDN. For details, see Verifying the Domain Name Ownership.

    static.example.com

    Static Website Hosting

    -

    You can upload static website files to your OBS bucket and grant anonymous users the read permission for these files, and then configure static website hosting for the bucket, so that OBS can host your static website. For details, see Static Website Hosting.

    • If you have configured static website hosting for your OBS bucket, select Enable for Static Website Hosting. This way, when you access a single static file in the bucket, OBS does not list all files in the bucket.

      You also need to select Static website hosting on the origin server settings page of the CDN console. For details, see Why Are All Files in the Bucket Displayed When Users Request a File from an OBS Bucket Connected to CDN?

    • If static website hosting is not configured for your OBS bucket, do not enable this option. Otherwise, services will be abnormal.

    -

  3. Click OK.

Step 2: Add a CNAME Record Set

Add a CNAME record set to map the user-defined domain name to the default domain name of the bucket.

  1. Click Resolve to automatically add a CNAME record set.

    • If you specified a Huawei Cloud domain name, click Resolve for DNS to add a CNAME record set.
    • If you specified a domain name that is not registered with Huawei Cloud, skip this step and go to 2.

  2. Manually add a CNAME record set.

    • If you are not using a Huawei Cloud domain name, follow the CNAME resolution guide provided by your DNS provider.
    • If you are using a Huawei Cloud domain name, do as follows:
      1. Log in to the DNS console.
      2. In the navigation pane, choose Public Zones.
      3. (Optional) Create a public zone. If you have already created one, skip this step.
        1. On the Public Zones page, click Create Public Zone in the upper right corner.
        2. Configure parameters by referring to the following table. Retain the default settings for other parameters.
          Table 6 Parameters for creating a public zone

          Parameter

          Example Value

          Description

          Domain Name

          example.com

          The domain name purchased from a domain name registrar

          Enter the user-defined domain name bound to the bucket here.

          Enterprise Project

          default

          The enterprise project to be associated with the public zone. You can manage public zones by enterprise project.

          This parameter is available and mandatory only when you are using an enterprise account.

          Notes:

          • If you do not manage zones by enterprise project, select the default enterprise project.
          • If you manage zones by enterprise project, select another existing enterprise project.

            To create an enterprise project, see Creating an Enterprise Project.
        3. Click OK.
      4. Locate the row that contains the domain name to which you want to add a record set and click the domain name.
      5. On the Record Sets tab, click Add Record Set.
      6. Configure parameters by referring to Table 7. Keep the default settings for the parameters that are not listed in the following table.
        For details, see Adding a CNAME Record Set.
        Table 7 Parameters for adding a CNAME record set

        Parameter

        Example Value

        Description

        Type

        CNAME – Map one domain to another

        Choose a record set type depending on the purpose of the domain name.

        Select CNAME – Map one domain to another here.

        A message may be displayed, indicating that the record set you are trying to add conflicts with an existing record set of the zone.

        For details, see Why Is a Message Indicating Conflict with an Existing Record Set Displayed When I Add a Record Set?

        Name

        Leave it blank.

        The prefix of the domain name to be resolved

        For example, if the domain name is example.com, its prefix can be:

        • www: used for website resolution. The domain name to be resolved is www.example.com.
        • Left blank: used for website resolution. The domain name to be resolved is example.com.

          To use an at sign (@), leave this parameter blank.

        • abc: The domain name to be resolved is abc.example.com, a subdomain of example.com.
        • mail: The domain name to be resolved is mail.example.com.
        • *: The domain name to be resolved is *.example.com, any subdomain of example.com.

        Line

        Default

        Resolution line. The DNS server will return the IP address of the specified line, depending on where the visitor comes from.

        The default value is Default.

        This parameter can only be configured for public zone record sets.

        • Default: returns the default resolution result irrespective of where the visitors come from.
        • ISP: returns the resolution result based on visitors' carrier networks. For details, see Configuring ISP Lines.
        • Region: returns the resolution result based on visitors' geographical locations. For details, see Configuring Region Lines.
        • Custom line: returns a specific IP address based on the IP address range of visitors. For details, see Configuring Custom Lines.

        TTL (s)

        300

        The length of time (in seconds) for which a local DNS server caches a record set

        The default value is 300 (value range: 1 to 2147483647).

        If your service address changes frequently, set TTL to a smaller value. Otherwise, set TTL to a larger value.

        For more information about TTL, see What Is TTL?

        Value

        example-bucket.obs.cn-north-4.myhuaweicloud.com

        Domain name alias. You can enter only one domain name.

        • If CDN acceleration is not used, set this parameter to the bucket domain name.
        • If CDN acceleration is used, set this parameter to the domain name specified in the CNAME record allocated by CDN.
      7. Click OK.
      8. Verify that the added CNAME record set is in effect.

        Open the Windows command line interface and run the following command:

        nslookup -qt=cname User-defined domain name or CDN acceleration domain name configured for the bucket
        • Without CDN acceleration: If the output is the bucket domain name, the CNAME record set is in effect.
        • With CDN acceleration: If the output is the CNAME domain name allocated by CDN, the CNAME record set is in effect.

After the domain name is configured, CDN acceleration is not applied immediately. Refresh the domain name list to check the status. CDN acceleration is in effect only when the CNAME status is Enabled.

Accessing an Acceleration Domain Name over HTTPS

CDN supports HTTPS acceleration. You can configure an HTTPS certificate for an acceleration domain name on the CDN console. After the certificate is configured, clients can access CDN PoPs over HTTPS. For details, see Configuring an HTTPS Certificate.

FAQ

Parent Topic: Domain Name Management