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[July 8, 2022] Classic CLB Upgrade Prompt

Last updated: 2022-07-14 15:59:53

    Upgrading Classic CLBs
    Tencent Cloud plans to upgrade the CLB architecture starting from now to August 8, 2022 at 24:00 (UTC+8). After then, the SLA for classic CLBs is no longer provided.
    To ensure the stability of your business, please upgrade the classic CLBs under your account to application CLBs in time.

    Application CLBs provides more features and better performance over classic CLBs with the same price.
    During the upgrade, the access to your business is not affected. The VIP of the classic CLB remains unchanged after the upgrade.

    How to Upgrade

    1. Log in to the CLB console and click Instance Management on the left sidebar.
    2. On the Instance Management page, select a region in the top-left corner and click the Classic Cloud Load Balancer tab.
    3. Find the instance to upgrade in the classic CLB instance list, and then select More > Upgrade in the Operation column.
    4. Click Submit in the Upgrading to CLB dialog box.

    Benefits and Impact of the Upgrade

    Public network CLB

    展开&收起

    Benefits

    • Each layer-4 listener can be configured with different real services.
    • Each layer-7 listener can be configured with multiple domain names and URLs; domain name-based forwarding and URL-based forwarding are supported; each URL can be configured with different real servers.
    • Features such as TCP SSL, SNI, and binding with ENI are supported. For more information, see Instance Type.

    Impact

    Private network CLB

    展开&收起

    Note

    Before upgrading, allow the access from the VIP to the real server port in the security group.

    Benefits

    • Each layer-4 listener can be configured with different real services.
    • Layer-7 listeners are supported; each layer-7 listener can be configured with multiple domain names and URLs; domain name-based forwarding and URL-based forwarding are supported; each URL can be configured with different real servers.
    • Features such as CLS log, SNI, and binding with ENI are supported. For more information, see Instance Type.

    Impact

    • Rolling back to classic CLB instance is not supported.
    • There may be uneven scheduling and session failures in a short period of time, and the monitoring data will have a breakpoint of around 5 minutes.
    • The configuration of application CLBs are different with classic CLBs. For more information, see Getting Started with CLB.
    • Classic CLB APIs are not applicable. You need to use CLB APIs instead.

    FAQs

    Why should I upgrade classic CLBs?

    Tencent Cloud CLB has stopped selling classic CLB instances since October 20, 2021. (See Classic CLB End-of-Sale Notice. CLB offers new features in addition to all the features of classic CLB, with a better user experience.
    Tencent Cloud plans to complete the upgrade for all classic CLB instances by August 8, 2022. To avoid affecting your business, please complete the upgrade on your end in time and make arrangements in advance.

    How do I configure a domain name after the upgrade?

    After the upgrading classic CLBs to application CLBs, it’s better to configure the domain names again.If you use DNSPod to resolve your domain name to myqcloud.com, you need to modify the DNS record.

    What will happen if I don't perform the upgrade?

    As Classic CLB is an end-of-live product, no more feature updates are available. Since August 8, 2022 at 24:00 (UTC+8), Tencent Cloud no longer provides SLA for classic CLBs, which means the stability and performance of your business may be affected.

    Is there a recovery plan if the upgrade fails and makes the service unavailable?

    If the upgrade fails, you can roll back to classic CLB; however, if the upgrade succeeds, rolling back is not supported.

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