Server Load Balancing

Server Load Balancing (SLB) is a network service that distributes traffic to a computing cluster that consists of multiple cloud servers. SLB increases the service capability of your application system through traffic distribution. It hides the real service port to enhance the security of the internal system. It also improves the reliability of your application system by eliminating single points of failure (SPOFs).
Benefits
Features
Product Updates
Scenarios
Quick Start
Customers

Benefits

High Performance

SLB uses a distributed cluster to provide the performance required to distribute large amounts of business traffic.

High Stability

SLB adopts the redundancy design to prevent SPOFs. More backend servers can be added conveniently as your business grows.

Cost Effectiveness

SLB allows you to deploy applications in a cost-effective manner. You can create private SLB instances and assign IP addresses to these instances free of charge.

Security

SLB provides free DDoS attack defense, which can dynamically start without delay.

Features

Basic Forwarding

SLB provides Internet-facing and internal-facing services at Layer 4 (TCP/UDP) and Layer 7 (HTTP/HTTPS).

Flexible EIP Binding/Unbinding

You can bind an EIP to an SLB instance and unbind it as needed. This improves flexibility and service availability.

Health Check

SLB checks the health of backend servers in your distributed cluster based on your configurations. Abnormal servers are automatically isolated.

Session Persistence

SLB supports session persistence, which distributes all requests from a client to the same backend server.

HTTPS Support

SLB supports HTTPS and allows you to manage HTTPS certificates in a centralized manner. This meets your diversified requirements for reliable, fast, and secure data transmission.

Product Updates

1

SLB Released

SLB is released and supports TCP and HTTP.
2014-07-24
New Releases
2

HTTPS Supported

SLB supports HTTPS. KCM is released. EPC instances can be used as the backend servers of Layer 7 SLB instances.
2016-10-20
New Features
3

Private SLB Instance Released

Layer 7 SLB instances support private IP addresses.
2017-03-23
New Features
4

Access Control

SLB supports access control for inbound traffic based on the protocol, IP address, traffic direction, and priority.
2018-09-13
New Features
5

Custom UDP-based Health Check

SLB supports custom UDP-based health checks.
2018-11-13
New Features
6

IPv6 SLB Instance Available for Purchase

IPv6 SLB instances are available for purchase in the Beijing, Shanghai, and Guangzhou regions. You can contact Kingsoft Cloud customer service to purchase IPv6 SLB instances.
2018-11-21
New Features
7

New Metrics

SLB supports new metrics, such as currently active connections, currently inactive connections, and concurrent connections, to help you check SLB status more conveniently.
2019-03-19
New Features
8

TLS Policy Supported

Third-party security evaluation websites have stringent requirements on the TLS version during security rating. This feature allows you to select the TLS version and the version of the TLS cipher suite.
2019-04-25
New Features
9

HTTP/1.1 Supported

Layer 7 listeners can access backend servers through HTTP/1.1.
2019-04-25
New Features

Scenarios

Basic Scenario

SLB can be used with EIP to distribute traffic from the Internet to different cloud servers.