In this chapter, we learned the different aspects of the recently redesigned and enhanced Proxmox High Availability 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 the down time during the node or network failure of a node. We explained the requirements the infrastructure must meet in order to implement a fully functional High Availability feature. We walked you through the process of HA configuration and finally tested HA by creating a simulating device failure. We also learned how to install and use the Proxmox HA simulator to see HA in action without setting up a cluster.
Due to the nature of Proxmox HA it is highly recommended to test this feature to its full extent before diving into implementing it in production cluster. HA can limit user interaction during some operations. The need for HA should be evaluated and if used it should be thoroughly tested before implementing it...