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FusionCloud Solution Description 04

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Implementation Principles

Implementation Principles

Logical Architecture

This section describes VHA components and their positions in the system architecture layer by layer.

Figure 26-2 shows the logical architecture of VHA.

Figure 26-2 Logical architecture of VHA
Table 26-1 Component details






VHA management console.


BCManager eReplication

VHA service system, which receives requests from the VHA management console.

Management domain

Operation Plane

Provide operation management for VHA, such as quota, metering and so on.

OM Plane

Provide operation and maintenance management for VHA, such as alarm, log and so on.


Provides identity and access management for VHA.

Service Flow

Figure 26-3 shows the workflow of VHA.

Figure 26-3 Service flow of VHA
  1. A VDC operator applies for an EVS disk HA service instance on the ManageOne operation plane.
  2. After receiving the task of creating DR protection, BCManager eReplication invokes Nova API to query the number of volumes mounted to ECSs.
  3. BCManager eReplication invokes Cinder API to create a HyperMetro secondary volume on the corresponding HyperMetro storage device, and query the capacity of volumes mounted to ECSs and obtains the corresponding storage device information.
  4. BCManager eReplication invokes DRExtend API to create HyperMetro pairs between the primary and secondary volumes. Add all HyperMetro pairs in the service instance to the HyperMetro consistency group.
  5. BCManager eReplication invokes Nova API to mount the created HyperMetro secondary volume to an ECS.
Updated: 2019-10-23

Document ID: EDOC1100063247

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