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FusionCloud Solution Description 04

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Implementation Principles

Implementation Principles


Figure 16-4 shows the overall architecture of the ELB. Users can use the standard OpenStack API to develop the ELB.

Figure 16-4 ELB architecture
Table 16-1 Component details

Component Type

Component Name


Console layer


Provides level-1 load balancing.


Provides level-2 load balancing.

Network Console (ELB)

Enables you to manage all ELB-related resources.

API/Service layer


Provides load balancing capabilities for Combined API.

Network Service (ELB)

Provides interfaces for Network Console to manage ELB resources.

Common components

API Gateway

Third-party applications call ECS APIs through API Gateway.


Provides the resource metering and billing function.


Provides domain name resolution and time synchronization.


Displays the task status.

Resource pools


Provides the Image Management Service (IMS).


Manages the life cycle of computing instances in the FusionSphere OpenStack environment, for example, creating instances in batches, and scheduling or stopping instances on demand.


Provides persistent block storage for running instances. Its pluggable drives facilitate block storage creation and management.


Provides APIs for network connectivity and addressing.

Management domain


Provides Identity and Access Management (IAM).


Provides performance monitoring and alarm generation.

Service OM

Provides O&M and management.


Provides the resource metering and billing function using SDR.

Service Flow

Figure 16-5 shows the service flow of ELB.

Figure 16-5 ELB service flow

The service flow contains the following tasks:

  1. The VDC administrator or operator applies for a load balancer on the ELB console.
  2. ELB sends the request to Neutron through the API.
  3. Neutron creates ELB instances using resources in the network resource pool.
Updated: 2019-10-23

Document ID: EDOC1100063247

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