Book Image

Mastering Proxmox - Third Edition

By : Ahmed
4 (1)
Book Image

Mastering Proxmox - Third Edition

4 (1)
By: Ahmed

Overview of this book

Proxmox is an open source server virtualization solution that has enterprise-class features for managing virtual machines, for storage, and to virtualize both Linux and Windows application workloads. You'll begin with a refresher on the advanced installation features and the Proxmox GUI to familiarize yourself with the Proxmox VE hypervisor. Then, you'll move on to explore Proxmox under the hood, focusing on storage systems, such as Ceph, used with Proxmox. Moving on, you'll learn to manage KVM virtual machines, deploy Linux containers fast, and see how networking is handled in Proxmox. You'll also learn how to protect a cluster or a VM with a firewall and explore the new high availability features introduced in Proxmox VE 5.0. Next, you'll dive deeper into the backup/restore strategy and see how to properly update and upgrade a Proxmox node. Later, you'll learn how to monitor a Proxmox cluster and all of its components using Zabbix. Finally, you'll discover how to recover Promox from disaster strikes through some real-world examples. By the end of the book, you'll be an expert at making Proxmox work in production environments with minimal downtime.
Table of Contents (17 chapters)

The main cluster issues

This section contains issues related to the main Proxmox's cluster operations.

Issue – Proxmox virtual machines are running, but the Proxmox GUI shows that everything is offline

This is usually caused by one of the three services, such as pvedaemon, pvestatd, or pveproxy crashing or stopping working for any number of reasons. Simply restarting them through SSH will fix this issue. One of the common causes of this issue is if any NFS shared storage gets stuck during an extended backup task. A node reboot will always fix this issue. But reboot is not always possible in a production node. Forcefully unmounting the NFS shared storage under /mnt/pve/<share>, then running the following...