How to reduce the size of an LVM disk on a Debian system on Proxmox and an underlying EXT4 disk
Background I’ve never reduced the size of a disk. Everywhere you read up about it there are huge disclaimers that it can break your system,
proxmox
Oversubscribing LVM-Thin on Proxmox – warnings
Background LVM-Thin is great because you don’t use all the disk space and can share between hosts. However, it’s dangerous to oversubscribe if one of
Proxmox – Unable to wipe disk – disk/partition ‘/dev/sdX’ has a holder (500) – on mirrored disks
Background When deleting a disk from the Proxmox UI, you are presented with several options. Depending on where you started, you might get this problem:
Proxmox installation stuck on 3% creating LVs
Yep, this is apparently normal, mostly if you had data on the drive before, see: https://forum.proxmox.com/threads/proxmox-installation-stuck-on-3-creating-lvs-please-help-guys.94650/
Proxmox SNMP Primer
Introduction Proxmox VE hypervisors need to be monitored. Some of the key items you could monitor are: Disk I/O Wait time CPU temperature Smart Status
Proxmox Backup Server fingerprint issues after adding Let’s Encrypt ACME
After installing an HTTPS certificate, the following problem started occurring: 2024-05-19T08:41:52.869412+02:00 server pvestatd[1481]: backup-server1.example.com: error fetching datastores – fingerprint ‘X’ not verified, abort! 2024-05-19T08:41:53.063071+02:00 server
Anatomy of (another) Proxmox hypervisor reboot gone wrong
Introduction I hate Proxmox hypervisor reboots. Any hypervisor reboot is a bad thing, because at the end of the day you’ll have VMs on the
Proxmox Mail Gateway Quick Start Guide
Introduction Writing a quick start article for an anti-spam gateway is not trivial. The fact of the matter is everyone’s idea on how to use
Proxmox Hypervisor Reboot: DMAR-IR: [Firmware Bug]: ioapic 3 has no mapping iommu, interrupt remapping will be disabled
A while ago I rebooted a Proxmox server in cluster and got this scary message: DMAR-IR: [Firmware Bug]: ioapic 3 has no mapping iommu, interrupt
Anatomy of Proxmox File Systems Crashes – stuck on `random: crng init done` again?
Proxmox disks sometimes break. It’s not supposed to, but when it happens it can be devastating. I only use defaults. Nothing fancy. Whatever the operating