Book Image

Mastering Proxmox - Third Edition

By : Wasim Ahmed
Book Image

Mastering Proxmox - Third Edition

By: Wasim 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 (23 chapters)
Title Page
Credits
About the Author
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface

Debugging the Proxmox installation


Debugging features are part of any good operating system. Proxmox has debugging features that will help you during a failed installation. Some common reasons are unsupported hardware, conflicts between devices, ISO image errors, and so on. Debugging mode logs and displays installation activities in real time. When the standard installation fails, we can start the Proxmox installation in debug mode from the main installation interface, as shown in the following screenshot:

The debug installation mode will drop us in the prompt, as shown in the following screenshot:

To start the installation, we need to press Ctrl + D. If there is an error during the installation, we can simply press Ctrl + C to get back to this console to continue with our investigation. From the console, we can check the installation log using the following command:

# cat /tmp/install.log

At times, it may be necessary to edit the loader information when normal booting does not function. This is a common case when Proxmox is unable to show the video output due to UEFI or a nonsupported resolution. In such cases, the booting process may hang. From the main installation menu, we can press E to enter edit mode to change the loader information, as shown in the following screenshot:

One way to continue with booting is to add the nomodeset argument by editing the loader. The loader should look as follows after the edit:

linux/boot/linux26 ro ramdisk_size=16777216 rw quiet nomodeset