#proxmox
Every post tagged proxmox.
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.
How to Create an LXC Container in Proxmox VE (Step-by-Step Guide)
Learn what an LXC container is, how it differs from a virtual machine, and how to create your first Linux container in Proxmox VE using both the web interface and the command line.
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.
How to Enable QEMU Guest Agent in Proxmox VE (Beginner Guide)
Learn what the QEMU Guest Agent does in Proxmox VE, why it matters for clean shutdowns and reliable backups, and how to install and enable it step by step on both Linux and Windows virtual machines.
How to Fix the "No Valid Subscription" Error in Proxmox VE
Seeing the "No valid subscription" pop-up in Proxmox VE? Learn what it means and how to switch to the free no-subscription repository so updates work again, step by step.
Configuring VXLAN Overlay Networks in Proxmox VE SDN for Multi-Node Clusters
A practical guide to deploying VXLAN zones in Proxmox VE 9.2 SDN: MTU planning, peer-list management, diagnostics, and production-ready configuration examples for multi-node clusters.
Preventing Split-Brain in Two-Node Proxmox VE Clusters with a Corosync QDevice
How to deploy a Corosync QDevice so a two-node Proxmox VE cluster keeps quorum and High Availability working through a single node failure.
Tuning ZFS ARC Memory Limits on Proxmox VE Storage Nodes
Learn why ZFS ARC's default memory ceiling causes VM OOM errors on Proxmox hosts, and how to safely cap and persist zfs_arc_max.