There are several steps to configure HA in a vSphere cluster:
1. Ensure that all hosts in the cluster are properly configured and meet the requirements for HA. This includes having compatible hardware and firmware, sufficient resources (such as CPU and memory), and a shared storage system.
1. Enable vSphere HA in the cluster by selecting the HA option in the vSphere Web Client or vSphere Client. This will enable the creation of a failover cluster and the automatic detection of host failures.
1. Configure the admission control policy for the cluster. This determines how many virtual machines can be powered on in the cluster, based on available resources.
1. Configure response for a failed host. You can select the option to power off the virtual machines on the failed host or to restart them on other hosts in the cluster.
1. Test the HA configuration by simulating a host failure. This will help you ensure that the failover cluster is working as expected and that virtual machines are being properly restarted on other hosts in the cluster.
1. Monitor the HA cluster to ensure that it is functioning correctly and to detect any issues that may arise. This includes monitoring resources, such as CPU and memory usage, as well as virtual machine availability and performance.
Overall, configuring HA in a vSphere cluster involves ensuring that all hosts are properly configured, enabling the HA feature, configuring admission control and response for failed hosts, testing the configuration, and monitoring the cluster to ensure proper functioning.
