You can create a High Availability (HA) cluster by either creating a new cluster from scratch and then adding applets and Broker VM nodes to the cluster, or by creating a new cluster from an existing standalone Broker VM. There is no limit to the number of clusters and nodes that you can add.
There are a number of different ways that you can configure the HA cluster to acheive fault tolerance depending on your system requirements. For example, once a cluster is created from scratch, you can start by configuring the applets that you want the cluster to maintain and then adding the Broker VM nodes that will be managed by the cluster to maintain this configuration, or vise versa. When you create a new cluster from an existing Broker VM, the cluster inherits the applets already configured, which can help save time with your cluster configuration.
For the cluster to start working and provide services, you need at least one operational node. Until this node is added, the cluster is unavailable. Once a node is added, the cluster begins operating, but it's not considered healthy. For the cluster to be healthy and maintain HA and redundancy, you need at least two working nodes in the cluster.
For "active/active" applets that require load balancing, you must install a Load Balancer in your network to distribute the incoming data between the nodes.
Be sure you do the following tasks before creating a cluster from an existing Broker VM:
Since the Pathfinder applet isn't supported when configuring HA clusters, you must ensure Pathfinder is deactivated on the Broker VM.
If the Broker VM is explicitly specified in some Agent Settings profile, which mean Cortex XDR agents retrieve release upgrades and content updates from this Broker VM, you must change the Broker VM's current designated role. To do this, you need to modify the Agent Settings profile by removing the specific selection of this broker as a Download Source for XDR agents ( → → → → → → ). After you create the cluster for this broker, you can go back the Agent Settings profile and select the cluster that you created from this broker to be used as a Download Source for XDR agents.
Select→ → → .
Detemine how you want create an HA cluster:
Define the following parameters:
Add Broker VMs to your cluster as you require to achieve fault tolerance and high availability. For the cluster to be healthy and maintain HA and redundancy, you need at least two working nodes in the cluster.