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)

Recovering from the grub2 update issue

Due to the latest grub2 update, there may be some instances, when updating a Proxmox node through the GUI, that cause issues by breaking packages. This is especially true for an earlier release, such as Proxmox 3.4. All the newer versions of Proxmox seem to have this issue fixed. To prevent this issue from happening, it is best to upgrade a node through SSH or the console by logging in directly on the node and not through the GUI. If the upgrade has already been applied through the GUI and there are unconfigured packages due to issues, perform the following steps to fix the issue:

  1. Check package status:
        # pveversion -v  
  1. Before configuring grub, we need to know the device where Proxmox is installed. We can find the device by running the following command:
        # parted -l   
  1. If there are incorrect packages, run the following...