Newsletter
Subscribe our newsletter
Get new infrastructure guides, comparison reports, and migration notes in your inbox.
Tag
High Availability
12 articles tagged High Availability, newest first.
Proxmox UPS Shutdown: Why Cluster Order Matters
PVE-UPS adds PBS support and cluster-aware shutdown. What matters most is stopping HA, Ceph, guests and hosts in the right order when power fails.
Proxmox Quorum Failed With 2 of 3 Nodes: Why
A 3-node Proxmox cluster lost quorum with one node offline because a stale QDevice left Corosync expecting four votes instead of three.
Ceph 2 OSD Cluster: Why 3 MONs Don't Make It HA
A two-OSD Proxmox Ceph cluster can run, but three MONs can't fix weak replica placement. The risks are in network design, min_size, and recovery.
Proxmox HA Mistakes: 10 Failover Problems to Avoid
Ten common Proxmox HA failover mistakes, from two-node quorum and uneven storage access to fencing, VE 9 affinity rules, capacity and untested recovery.
Why a Two-Node Proxmox Cluster Needs a Third Vote for Quorum
Why two-node Proxmox clusters create false confidence, how quorum really behaves, and what admins miss when they expect HA without a third vote.
The Day a Three-Node Cluster Refused to Trust Itself
A plain-English breakdown of why a three-node cluster shuts down or panics after losing quorum, even when one host can still run every VM.
Why a Three-Node HA Cluster Panics When Two Nodes Go Down
Why a three-node HA cluster can panic when two nodes disappear, and how quorum and split-brain protection shape that behavior.
How I Ended Up Running Ceph, StarWind and Synology at Once
A Proxmox homelab story about chasing HA bulk storage with Ceph, StarWind VSAN and Synology, and why letting each tool do its own job won out.
Ceph, StarWind or Something Else for HA Storage in Proxmox?
Why highly available Samba or NFS storage in Proxmox is hard, comparing Ceph, CephFS, StarWind VSAN, clustered filesystems and a plain NAS.
Put Your Cluster on Ice: The One Step You Can't Forget in Proxmox HA
A rack power upgrade became a cluster-wide reboot storm because HA was never put into maintenance mode, a step Proxmox still has no GUI button for.
Ceph, HA, and the Minimum Viable Cluster for SMBs
The smallest Proxmox HA cluster that makes sense with Ceph, from 2-node setups with a QDevice to the 3 to 5 node builds the community recommends for SMBs.
Proxmox Ceph vs ZFS vs NAS: HA Storage Compared
Proxmox Ceph vs ZFS vs NAS for high availability: how each handles a node failure, which cluster sizes it fits, and how to pick without overengineering.