Cluster Overview

A cluster is a logical container of one or more Thunder devices that work together to provide services to users. Clusters play a key role in achieving scalability, high availability, and fault tolerance. Each server or instance within a cluster is called a node.

These devices operate in various modes, such as active-standby mode, active with all services and active on all devices, or active with specific resources active on one device and standby on others.

Cluster Types

The following cluster types exist in A10 Control:

• Single (node): The single cluster type allows you to add only one Thunder device as part of the cluster. A single-node cluster is recommended for small-scale deployments or applications with low resource requirements.
• Multinode: The multinode cluster type allows you to add multiple Thunder devices as part of the cluster. Multiple-node clusters are utilized for horizontal scalability and fault tolerance. This means that the additional nodes can be added to the cluster to handle an increased workload or user demand.

• VRRP-A: The VRRP-A cluster type allows you to add two or more Thunder devices that are added as VRRP-A in your environment. These devices have VRRP-A configured but do not have scaleout configured on them. Configuration is synchronized on the devices in the cluster through A10 Control or aVCS Master.

• Scaleout: The scaleout cluster type allows you to add two or more Thunder devices as a scaleout cluster in your environment. These devices have Scaleout configured but do not have VRRP-A configured on them. Configuration is synchronized on the devices in the cluster through A10 Control or aVCS Master.
• TPS-Mitigator-Group: The TPS-mitigator-group cluster type allows you to add one or more new TPS mitigator devices. This cluster is mapped with A10 Defend Mitigator devices that are integrated with A10 Defend Orchestrator. The device acts as a mitigator when an incident occurs.
• TPS-Detector-Group: The TPS-detector-group cluster type allows you to add one or more new TPS detector devices. This cluster is mapped with the A10 Defend Detector devices that is integrated with A10 Defend Orchestrator. The device or device set acts as a detector for the zone. The detector detects anomalies and displays them.

For more information, see the following manuals on the Documentation site:

• Configuring VRRP-A High Availability to know more about the VRRP-A cluster.
• Scaleout Configuration Guide to know more about Scaleout cluster.
• Configuring ACOS Virtual Chassis Systems to know more about aVCS cluster.
• A10 Defend Orchestrator App Help to know more about the TPS cluster.