#high-availability
Every post tagged high-availability.
Blog posts
How to Safely Shut Down or Reboot a Proxmox VE Host (Without Breaking Your VMs)
Pulling the plug on a Proxmox host the wrong way can corrupt a VM's disk or trigger an unwanted HA failover. Here's the safe way to shut down or reboot a node, from the GUI, the shell, and inside an HA-enabled cluster.
How to Set Up Storage Replication Between Proxmox VE Nodes (ZFS-Based, No Shared Storage Required)
Configure ZFS-based storage replication between Proxmox VE nodes from scratch using the GUI and the pvesr CLI — schedules, bandwidth limits, and how it pairs with HA for fast failover without a SAN.
How to Configure High Availability (HA) for VMs and Containers in Proxmox VE
A hands-on guide to building real HA in Proxmox VE: enabling ha-manager on VMs and containers, controlling placement with node and resource affinity rules, tuning restart/relocation limits, and testing failover before you trust it.
How to Remove a Node From a Proxmox VE Cluster (Safely, Without Breaking Quorum)
Decommissioning hardware or cleaning up after a dead node? Here's the full, correct order of operations for removing a node from a Proxmox VE cluster: draining workloads, tearing down Ceph and replication jobs, running pvecm delnode, recovering from quorum loss, and cleaning up everything the command leaves behind.
How to Upgrade Proxmox VE 8 to Proxmox VE 9 (Complete Step-by-Step Guide)
A complete, safe walkthrough for upgrading a Proxmox VE 8.x host or cluster to Proxmox VE 9, covering pre-upgrade checks, repository migration to Trixie, Ceph and HA considerations, and post-upgrade verification.
How to Live Migrate a Virtual Machine Between Nodes in a Proxmox VE Cluster
Learn how live migration works in Proxmox VE, what your cluster needs before it will work, and how to move running VMs between nodes from the web UI and CLI without downtime.
Tuning Corosync Link Priority and Token Timeouts for Proxmox VE Cluster Resilience
Proxmox VE corosync redundancy only works if knet actually prefers the right link. Here's how to set link priority correctly, read corosync-cfgtool output, and avoid tuning the token timeout blind.
Setting Up a Corosync QDevice for Two-Node Proxmox VE Cluster Quorum
A two-node Proxmox VE cluster loses quorum the moment one node reboots. Here's why the vote math breaks down and how to fix it permanently with an external corosync QDevice as a tie-breaker.
What Is a Proxmox Cluster? (And Do You Actually Need One?)
Clustering sounds like something only data centers need, but it's really just several Proxmox nodes agreeing to share one view. Here's what Corosync and quorum actually mean, and when you genuinely need a cluster versus when you don't.
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