#cluster
Every post tagged cluster.
Blog posts
How to Add iSCSI Storage in Proxmox VE (With LVM on Top for VM Disks)
Connecting Proxmox VE to a SAN over iSCSI is only half the job — a raw LUN can hold just one VM disk. This guide shows how to add the iSCSI target and layer LVM on top so you get real shared storage for VM disks across a cluster.
How to Deploy a Hyper-Converged Ceph Cluster in Proxmox VE (Step-by-Step Setup Guide)
Turn the local disks in your Proxmox VE nodes into one shared, self-healing storage pool. Install Ceph, create monitors, managers, and OSDs, build a pool, and wire it up as VM storage.
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.
Configuring Redundant Corosync Links for Proxmox VE Cluster Resilience
A single corosync link is a hidden single point of failure in every Proxmox VE cluster. Here's how to diagnose link instability and configure a second, truly independent corosync link using knet.
Proxmox VE VXLAN Overlays: Building Multi-Node SDN Networks That Actually Work
A practical walkthrough of building multi-node VXLAN overlays with Proxmox VE SDN, covering MTU pitfalls, peer list mistakes, firewall gotchas, and the exact commands to diagnose a tunnel that looks applied but drops traffic.
Diagnosing and Fixing Flapping Ceph OSDs in a Proxmox VE Hyper-Converged Cluster
A field-tested workflow for diagnosing flapping and down Ceph OSDs on Proxmox VE 9.2 clusters: network, disk, memory, and clock-skew root causes, with exact pveceph and ceph CLI commands to stabilize and fix the cluster.
Troubleshooting Corosync Cluster Communication Failures in Proxmox VE
A practical field guide to diagnosing and fixing corosync communication failures in Proxmox VE clusters, covering symptoms, root causes, diagnostic commands, redundant link configuration, and best practices to prevent HA fencing incidents.
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