In this chapter, we learned about the different aspects of the recently redesigned and enhanced Proxmox HA feature and how it can benefit a virtual environment. By leveraging HA, we can automate the response to a failure by auto-migrating VMs, thus reducing downtime during node power failure or network failure. We explained the requirements the infrastructure must meet in order to implement a fully functional HA feature. We walked through the process of HA configuration and finally tested HA by simulating device failure. We also learned how to install and use the Proxmox HA simulator to see HA in action without setting up any clusters.

Due to the nature of Proxmox HA, it is highly recommended you test this feature to its full extent before diving into implementing it for production clusters. HA can limit user interaction during some operations. The need for HA should be...