In this brief demonstration, we’ll set up and run three instances of WildFly on the same machine (localhost). Together they will form a cluster. It’s a rather classic setup, where the appservers need to synchronize the content of their application’s session to ensure failover if one of the instances fails. This configuration guarantees that, if one instance fails while processing a request, another one can pick up the work without any data loss. Note that we’ll use a multicast to discover the members of the cluster and ensure that the cluster’s formation is fully automated and dynamic.
Install Ansible and Its Collection for WildFly
On a Linux system using a package manager, installing Ansible is pretty straightforward: