Virtualizations

Ceph 19.2.6 is a security patch. What makes it different from every other Ceph patch you have shipped in the last five years is that the fix for the headline CVE introduces the first new CephX key type in the project’s history, aes256k. That turns “update the packages” into “migrate every credential in the cluster, on every node, for every client, without breaking the ones that are in use right now.”

This post walks through the whole thing: what the four CVEs actually are, how CephX authentication works well enough to understand why the rotation is hard, where the keys live on a Proxmox node, the preflight checks that save you during the upgrade, the Proxmox migration helper step by step, and the specific things that went wrong for people who did not follow the procedure.

If you have ever applied a Proxmox VE Software-Defined Network configuration and seen this warning pop up in the task view, you are not alone:

WARN: missing 'source /etc/network/interfaces.d/sdn' directive for SDN support!
Created symlink /etc/systemd/system/multi-user.target.wants/dnsmasq@testzone.service -> /lib/systemd/system/dnsmasq@.service.

TASK WARNINGS: 1

It looks harmless, and in most cases it is. But if you want SDN-generated networks to actually come up on the node, that one line is the difference between a pending configuration and a running one. This post explains where the warning comes from in the Proxmox source code, why the fix is a single source directive, and how to verify the whole pipeline works afterwards.

Proxmox Datacenter Manager (PDM) is a centralized management platform for overseeing multiple Proxmox VE clusters and Proxmox Backup Server instances from a single interface. This guide covers installation, configuration, and best practices for managing your virtualization infrastructure at scale.

Running VMware ESXi nested inside Proxmox VE is perfect for testing vSphere features, learning VMware technologies, or building a homelab. This updated guide for 2026 covers Proxmox VE 8.x and VMware ESXi 8.0 U3 with the correct virtual hardware configuration.

When running Ceph on Proxmox, issues can arise at any layer of the storage stack. Knowing the right commands to diagnose and resolve problems is essential for maintaining a healthy cluster. This guide covers the most useful Ceph commands for debugging and troubleshooting on Proxmox.

Running Linux virtual machines on macOS has become essential for developers working with containers, Kubernetes, and cloud-native technologies. Lima (Linux on macOS) and Colima (Containers on Lima) provide an elegant solution for running Linux workloads on Mac with minimal overhead and maximum compatibility.

Running Podman on macOS through Lima provides a lightweight, Docker-compatible container runtime without the overhead of Docker Desktop. This setup is ideal for developers who want a rootless, daemonless container experience on Mac with minimal resource consumption.

In this pos I will show you how you can backup to AWS S3 with Veeam Backup.

When adding repositories to a Veeam Scale Out Backup Repository you may see this error: Cant Add Repository to a Scale Out Backup Repository? In this Pos I will show you how you can fix is issue.

This article explains how to redirect messages to a serial console in on Debian and use Serial Console on Proxmox VE.