Abstract: In Huawei Cloud KYON (Keep Your Own Network) enterprise cloud Network solution, elastic load balancing service provides hybrid load balancing function. Load balancing of public cloud can be bound to Huawei cloud and IDC to achieve seamless service integration and resource sharing between cloud and cloud.

This article is shared by Huawei Cloud community “[Cloud Lesson] Basic Service Lesson 77 huawei Cloud KYON ELB Mixed load balancing”, originally written by: Yun Xiaomeng.

Huawei Cloud KYON (Keep Your Own Network) enterprise-level cloud Network solution creates a simple and agile way to go to the cloud, helping enterprises with minimalist planning, agile migration and seamless integration. It is the only choice for enterprises to go to the cloud.

After enterprise services are migrated to the cloud, existing IDC servers in the cloud continue to be used. IDC resources in the cloud and in the cloud are independent and cannot be shared.

To address these problems, KYON provides a hybrid load balancing function. The public cloud load balancer can be used to mount the IDC service back-end to achieve seamless service integration and resource sharing between the cloud and the cloud.

This document describes how huawei Cloud elastic LOAD balancing integrates upper-cloud and lower-cloud services to achieve load balancing through hybrid load balancing.

What is mixed load balancing?

Hybrid load balancing: In a hybrid cloud scenario, cloud private lines or virtual private networks seamlessly extend the local infrastructure to the cloud to build a cloud on-cloud and off-cloud converged network. Exclusive load balancing the backend mounts resources on and off the cloud to implement load balancing.

Huawei cloud exclusive LOAD balancing back-end server group supports adding servers in the VPC on the cloud, other VPCS, regions, and data centers under the cloud. Based on service requirements, users can flexibly configure and forward traffic requests to servers in, between, or under the cloud.

What are the advantages of mixed load balancing?

The hybrid cloud can be rapidly constructed. Resources on and under the cloud can be mounted to the back end to share resources on and under the cloud and seamlessly integrate services.

Integrates the advantages and product features of huawei cloud elastic load balancing exclusive ELB instance.

  • High forward

The cluster supports a maximum of 100 million concurrent connections to meet users’ massive service access requirements.

  • High stability

Instance resources are exclusive and the performance of an instance is not affected by other instances. Users can select instances of different specifications based on service requirements.

  • Layer 4 / Layer 7 network access

Layer 4 load balancing: Supports TCP. After receiving an access request, the listener directly forwards the request to the back-end server. High forwarding efficiency and fast data transmission.

Layer-7 load balancing: Supports HTTP and HTTPS. After receiving an access request, the listener identifies and forwards data based on fields in the HTTP/HTTPS packet header. Supports advanced functions such as encrypted transmission and cookie-based session persistence.

  • Multiple availability zone deployment

You can create load balancing instances in multiple availability zones. Each availability zone uses the optimal path to process access requests based on the algorithm. In addition, each availability zone backs up each other to improve service processing efficiency and reliability.

  • Health check

Periodically check the running status of the back-end cloud server. If the back-end cloud server is abnormal, traffic is forwarded to other normal cloud servers to ensure high service availability.

  • Keep the session

Identifying the relationship between client and server interaction ensures that a series of associated access requests remain allocated to the same server while implementing load balancing.

Integrates high-quality public network access capabilities of the Huawei cloud. Private lines and NAT share public network egress on the cloud, saving costs and providing high-speed Internet access for the cloud. Huawei cloud’s original L2CG large Layer 2 technology has a lot of black technology capabilities, making enterprise applications on the cloud migration more convenient and secure.

How do I configure a Layer 2 connection gateway?

To configure mixed load balancing, perform the following steps:

Step 1: Create a load balancer

Create a proprietary load balancer.

Step 2: Create a listener

Configure listeners for the ELB instance.

Note: Only TCP, HTTP, and HTTPS listeners support cross-VPC backend functionality.

Step 3 :(optional) configure a health check

You can configure health check when adding listeners, usually using the default health check configuration.

Note: In the exclusive ELB instance, to ensure normal health check, the source network segment must be the VPC subnetwork segment associated with the ELB, the destination port must be the health check port of the back-end server, and the destination port must be the service port of the back-end server.

Step 4: Add a back-end cloud server

To add a cross-VPC backend, enter the IP address, back-end port, and weight of the cross-VPC backend.

Cross-vpc back-end servers can be added that can communicate with each other through VPC peer connection, cloud connection, VPN connection, and private line connection, and can be bound to cloud hosts and INTRA-cloud IDC hosts as load balancing back-end server groups.

For more information on mixed load balancing, please click here.

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