Cloud Load Balancer
- Release Notes and Announcements
- Product Introduction
- Product Comparison
- Purchase Guide
- CLB Resource Package
- Getting Started
- Operation Guide
- CLB Instance
- CLB Listener
- Real Server
- Health Check
- Certificate Management
- Log Management
- Monitoring and Alarm
- Cloud Access Management
- Practical Tutorial
- Obtaining Real Client IPs
- Ops Guide
- Troubleshooting
- API Documentation
- Instance APIs
- Listener APIs
- Backend Service APIs
- Target Group APIs
- Redirection APIs
- Other APIs
- Classic CLB APIs
- Making API Requests
- Load Balancing APIs
- CLB API 2017
- Making API Requests
- Request Structure
- Returned Results
- General APIs
- Classic CLB APIs
- APIs for CLB Instances
- APIs for Listeners
- CLB Real Server APIs
- APIs for Health Check
- FAQs
- Troubleshooting Health Check Issues
CLB Release Notes
Last updated: 2024-12-30 16:22:23
January 2025
Update | Description | Release Date | Documentation |
Grayscale launch for prepaid resource packages | The prepaid CLB resource packages can be used to deduct the instance fees and the LCU fees incurred by LCU-supported instances in the pay-as-you-go mode once they become effective. | 2025-01-01 |
October 2024
Update | Description | Release Date | Documentation |
Optimization of health check status on the list page | When some listeners of the CLB instance are not configured with a RS, the customers will be notified with an "abnormal" status. | 2024-10-31 |
August 2024
Update | Description | Release Date | Documentation |
Abundant monitoring indicators and experience optimization | 1. Abundant monitoring indicators: "Other status codes returned by CLB", "number of successful health checks", enhancing business stability and user experience. 2. Monitoring and alert version iterates and upgrades to SDK 2.0, resolves issues from previous versions, optimizes the display dimensions and forms of the monitoring view, enhancing user experience | 2024-08-30 |
April 2024
Update | Description | Release Date | Documentation |
Domain Upgrade for Public Network CLB Used Domain | Starting from 00:00:00 on April 15, 2024, the domain for Tencent Cloud's Public Network CLB will undergo an upgrade. After the upgrade, the Tencent Cloud platform will not allow users to directly access using the default domain provided by the platform. | 2024-04-15 |
November 2023
Update | Description | Release Date | Documentation |
HTTPS listeners support configuring National Cryptography Standard Certificates (SM2) or simultaneously configuring National Cryptography Standard Certificates and International Standard Certificates (RSA/ECC) | Server certificates in SSL parsing for HTTPS listeners support configuring National Cryptography Standard Certificates (SM2) or simultaneously configuring National Cryptography Standard Certificates and International Standard Certificates (RSA/ECC). | 2023-11-15 |
October 2023
Update | Description | Release Date | Documentation |
Overseas regions network fee reductions for traffic billing and instance fees | From November 15, 2023, in overseas regions, network fees for traffic billing will be reduced by up to 35%, and instance fees will be reduced by up to 50%. | 2023-10-25 |
June 2023
Update | Description | Release Date | Documentation |
The price of pay-as-you-go LCU-supported instances reduced by 18% | Since June 1, 2023, 00:00:00, Beijing Time (UTC+8), the official price for the pay-as-you-go LCU-supported instances has been reduced by 18%. | 2023-06-01 |
April 2023
Update | Description | Release Date | Documentation |
Tool for verifying health check source IPs launched | With the tool for verifying health check source IPs, you can quickly check whether the health check source IPs of CLB instances under your account are within the 100.64.0.0/10 IP range. You can also switch the health check source IPs from the CLB VIP to the IP range 100.64.0.0/10 directly. | 2023-04-21 |
January 2023
Update | Description | Release Date | Documentation |
Support for RSA and ECC certificates by HTTPS listeners | HTTPS listeners support the RSA and ECC certificates in SSL parsing, which use different encryption algorithms. | 2023-01-30 |
December 2022
Update | Description | Release Date | Documentation |
Log sampling | CLB supports log collection through sampling, to reduce the amount of reported data and reduce costs | 2022-12-28 | Log sampling |
September 2022
Update | Description | Release Date | Documentation |
Enabling or disabling CLB instances and listeners | When a CLB instance is disabled, it cannot receive or forward traffic. | 2022-09-08 | Enabling or disabling CLB instances |
January 2022
Update | Description | Release Date | Documentation |
Obtaining real client IPs through TOA | In hybrid cloud deployment and NAT64 CLB scenarios, layer-4 CLB (only TCP) can obtain the real client IP through TOA. | 2022-01-13 |
August 2021
Update | Description | Release Date | Documentation |
Cloning CLB instances | This feature allows you to easily copy the configuration of existing CLB instances, including instance attributes, listeners, security groups, and logs. | August 11, 2021 |
May 2021
Update | Description | Release Date | Documentation |
Supports health check logs | CLB supports configuring layer-4 and layer-7 health check logs to be stored in CLS, reporting logs every minute, and querying logs with multiple rules in real time. | May 21, 2021 |
January 2021
Update | Description | Release Date | Documentation |
Supports binding CLB instances with SCF functions | CLB instances support binding with SCF functions, enabling more convenient and cost-effective public network access for SCF. | January 28, 2021 |
December 2020
Update | Description | Release Date | Documentation |
Supports static single-line IP CLB instances | In some districts, the ISP of CLB instances can be China Mobile, China Unicom, or China Telecom, and the bandwidth price is lower than the general BGP IP price. | 2020-12-03 | |
Optimizes health check | TCP listeners support HTTP health checks and UDP listeners support checking ports. | December 14, 2020 |
September 2020
Update | Description | Release Date | Documentation |
Fully supports custom layer-7 configurations on CLB instances | CLB fully supports setting the layer-7 configuration parameters of CLB instances. | September 22, 2020 | |
CLB cross-region binding 2.0 | CLB supports binding CVM instances across regions through CCN, allowing you to select CVM instances of different regions and bind to them across VPCs or regions. | September 10, 2020 | |
Supports hybrid cloud deployment | CLB instances can be directly bound to IPs of local IDCs. | September 10, 2020 |
June 2020
Update | Description | Release Date | Documentation |
Supports the QUIC protocol | Layer-7 HTTPS listeners support the QUIC protocol to establish a QUIC connection between clients and CLB instances. | 2020-06-29 |
May 2020
Update | Description | Release Date | Documentation |
Security groups can be bound to private network CLB instances | Security groups can be bound to private network CLB instances to isolate private network traffic. | May 27, 2020 | |
Supports "Allow Traffic by Default" on security groups | After "Allow Traffic by Default" is enabled, client IPs and service ports to the Internet do not need to be opened in the backend CVM security group. Access traffic from a CLB instance only needs to pass through the CLB security group, while the backend CVM allows CLB traffic by default and does not need to open any ports. | May 27, 2020 | |
Updates the default domain name policy for layer-7 listeners | The default domain name is changed from optional to required for layer-7 listeners. Each listener must and can only have one default domain name configured. | May 15, 2020 |
April 2020
Update | Description | Release Date | Documentation |
Deactivates the feature for storing CLB access logs in COS | You can no longer store new access logs in COS after May 15, 2020 00:00:00, (or after April 26, 2020 00:00:00 in the Guangzhou region). The feature will be officially deactivated in all regions on June 30, 2020 00:00:00. To use the updated feature, seeStoring Access Logs in CLS. | April 21, 2020 | - |
November 2019
Update | Description | Release Date | Documentation |
Shared bandwidth package is supported for CLB instances | IP bandwidth package is supported for CLB instances of bill-by-IP accounts. | November 20, 2019 |
October 2019
Update | Description | Release Date | Documentation |
Supports IPv6 | IPv6 CLB can be bound to the IPv6 address of a CVM instance and provides an IPv6 VIP address. A CLB instance using the IPv6 single-stack technology can collaborate with IPv4 CLB to implement IPv6/IPv4 dual-stack communication. | 2019-10-17 | |
Access logs can be stored in CLS | CLB supports storing layer-7 access logs in CLS with online search at 1-minute granularity. | 2019-10-15 | |
Private network CLB instances support redirection | Private network layer-7 CLB instances support redirection configurations. | 2019-10-15 |
May 2019
Update | Description | Release Date | Documentation |
Supports tag authentication | CLB supports tag-based permission management. | May 7, 2019 |
April 2019
Update | Description | Release Date | Documentation |
Supports binding ENIs | CLB can be bound with ENIs to forward traffic to the corresponding private IPs of ENIs on the same CVM instance. | April 30, 2019 |
November 2018
Update | Description | Release Date | Documentation |
Supports Anycast CLB | Anycast CLB supports dynamic acceleration in multiple regions. The CLB VIP is published in multiple regions, and the client connects to the nearest POP, the traffic can be forwarded to a CVM instance through the high-speed Internet of Tencent Cloud IDC. | November 27, 2018 |
October 2018
Update | Description | Release Date | Documentation |
Supports TCP SSL protocol | CLB supports the TCP SSL protocol, which is suitable for scenarios that require ultra-high performance and large-scale TLS offloading. | October 12, 2018 |
August 2018
Update | Description | Release Date | Documentation |
Supports SNI | CLB supports multi-domain SNI certificate to configure different certificates for domain names under one listener. | 2018-08-21 |
April 2018
Update | Description | Release Date | Documentation |
Supports security groups | Public network CLB can be bound with security groups to control and isolate inbound and outbound traffic. | April 15, 2018 |
March 2018
Update | Description | Release Date | Documentation |
Supports custom layer-7 configurations on CLB instances | CLB supports setting the layer-7 configuration parameters of CLB instances. | March 27, 2018 | |
Access logs can be stored in COS | Public network layer-7 CLB supports storing access logs in COS to facilitate analysis and troubleshooting. | March 2018 |
September 2017
Update | Description | Release Date | Documentation |
Supports cross-region binding | You can select and bind real servers across VPCs and regions. | September 2017 |
June 2017
Update | Description | Release Date | Documentation |
Supports CAM authentication | Cloud Access Management (CAM) is used to manage access permissions for resources under Tencent Cloud accounts. You can use identity management and policy management to control which sub-accounts can access CLB resources. | July 2017 |
April 2017
Update | Description | Release Date | Documentation |
Supports layer-7 redirection | You can configure redirection on layer-7 HTTP/HTTPS listeners, such as redirection from HTTP to HTTPS. | April 8, 2017 | |
Weighted least-connection scheduling is supported for round robin algorithms | The weighted least-connection scheduling is based on the processing capabilities and weights of real servers to balance loads. | April 8, 2017 |
November 2016
Update | Description | Release Date | Documentation |
Supports layer-7 domain name and URL forwarding | CLB supports layer-7 HTTP/HTTPS protocols to provide flexible forwarding capabilities based on domain names and URL paths. | November 2016 |
April 2016
Update | Description | Release Date | Documentation |
Supports layer-7 HTTP and HTTPS protocols | Layer-7 HTTP and HTTPS protocols are application layer protocols. Layer-7 listeners support session persistence based on cookies and health check based on HTTP return codes. | April 2016 |
April 2015
Update | Description | Release Date | Documentation |
Supports VPC | A Virtual Private Cloud (VPC) is a custom logically isolated network space in Tencent Cloud. CLB instances in VPC can help you deploy and isolate services flexibly. | April 2015 |
December 2014
Update | Description | Release Date | Documentation |
Releases Cloud Load Balancer | CLB provides secure and fast traffic distribution services. It can seamlessly allocate the load balancing capacity required for application traffic, and automatically distribute application access traffic among CVM instances in the cloud to enhance fault tolerance. | December 2014 |
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