If you run HA, only high end server hardware with no single point of failure should be used. This includes redundant disks (Hardware Raid), redundant power supply, UPS systems, network bonding.
Fencing device(s) - reliable and TESTED! NOTE: this is NEEDED, there isn't software fencing...
I some cases, you might prefer to put a node back to local mode without reinstall, which is described here:
stop the cluster file system in /etc/pve/
# service pve-cluster stop
start it again but forcing local mode
# pmxcfs -l
remove the cluster config
# rm /etc/pve/cluster.conf
With respect to some of the cons, Proxmox VE performs well enough with Windows if you use KVM's virtio devices in lieu of emulated hardware. However, the freely available virtio drivers are not WHQL-certified, which produces annoying error messages when you attempt to load them.
With respect to...
i have problem with disk resize.
I try to change size in Proxmox, but show size in virtual machine not showing.
But if I try qemu-img info vm-100-disk-1.qcow2 i have this result:
file format: qcow2
virtual-size: 491G (527207235584 bytes)
disk size: 161G...
Proxmox has pretty flexible backup mechanisms for virtual machines, however, in order to run snapshot backups, i.e. live backups without bringing the virtual machine down, ensuring no downtime, NFS storage should be used. This document will describe the process of setting up NFS  storage and...
I read in a forum about Proxmox VE, an open source bare-metal virtualization based on OpenVZ. It support live migration and clustering. Anybody have try it in production environment? How does it compare to XenServer and ESXi/vSphere (free/essentials one)?