High availability

Sometimes, servers can become unresponsive and you may be unable to connect to them, particularly when they are overloaded. For such cases, most Intel PCs include a watchdog timer in the event the computer gets stuck and needs to do a hard reboot. Proxmox, however, disables all hardware watchdog drivers and enables softdog by default. In this short post, we'll quickly enable and test the Intel TCO watchdog in Proxmox.

One cannot use swap files on BTRFS and ZFS mirrors (or any other RAID levels), they require separate partitions. For high-availability and to ensure a drive failure doesn't result in a system crash, we need to create mirrored partitions and create our swap partition on top of that.