Cluster Without Fear: Free Sample (Quorum and the QDevice)

A free sample of Cluster Without Fear: Proxmox VE Clusters, Quorum, Shared Storage, Ceph, Live Migration and High Availability for a Homelab That Survives a Dead Node.

Inside: the cover and full table of contents, and all of Chapter 3, "Quorum and the QDevice": votes, expected votes and quorum, what a node does without quorum, why two nodes need a third vote, how the QDevice works, setting up corosync-qnetd on a Raspberry Pi with pvecm qdevice setup, verifying it, failure tests, living with a QDevice, and pvecm expected 1 as an emergency-only lever, with the diagrams and the real commands.

The full 74-page book (PDF and EPUB, 24 diagrams) is $19 at https://payhip.com/b/cb4j1

The full book is also in a bundle: Everything Bundle: every ebook in the store, $89 · Homelab Bundle, $59.