* at least three cluster nodes (to get reliable quorum)
* shared storage for VMs and containers
* hardware redundancy (everywhere)
* at least three cluster nodes (to get reliable quorum)
* shared storage for VMs and containers
* hardware redundancy (everywhere)
* hardware watchdog - if not available we fall back to the
linux kernel software watchdog (`softdog`)
* hardware watchdog - if not available we fall back to the
linux kernel software watchdog (`softdog`)