Book Image

Proxmox Cookbook

By : Wasim Ahmed, Ravi K Jangid
Book Image

Proxmox Cookbook

By: Wasim Ahmed, Ravi K Jangid

Overview of this book

Proxmox VE's intuitive interface, high availability, and unique central management system puts it on par with the world’s best virtualization platforms. Its simplicity and high quality of service is what makes it the foremost choice for most system administrators. Starting with a step-by-step installation of Proxmox nodes along with an illustrated tour of Proxmox graphical user interface where you will spend most of your time managing a cluster, this book will get you up and running with the mechanisms of Proxmox VE. Various entities such as Cluster, Storage, and Firewall are also covered in an easy to understand format. You will then explore various backup solutions and restore mechanisms, thus learning to keep your applications and servers safe. Next, you will see how to upgrade a Proxmox node with a new release and apply update patches through GUI or CLI. Monitoring resources and virtual machines is required on an enterprise level, to maintain performance and uptime; to achieve this, we learn how to monitor host machine resources and troubleshoot common issues in the setup. Finally, we will walk through some advanced configurations for VM followed by a list of commands used for Proxmox and Ceph cluster through CLI. With this focused and detailed guide you will learn to work your way around with Proxmox VE quickly and add to your skillset.
Table of Contents (18 chapters)
Proxmox Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Removing nodes from a cluster


At times, it may be necessary to remove a node from a cluster for various reasons. A n can only be removed through the CLI as of Proxmox VE 3.4.

Getting ready

Before removing a node, be sure there are no running VMs in a node. Move any VMs to a different node by following the steps in the Migrating a virtual machine recipe, shown later on in this chapter. Log in as the root to a node not being removed through SSH or the Proxmox GUI | Shell. Power off the node that needs to be removed.

Note

Proxmox highly recommends that the removed node does not power up in the same network as it is. Removing a node from cluster is a permanent process. It will delete all cluster information from the node that is being removed.

How to do it…

Use the following steps, to remove nodes from the cluster:

  1. Run the following command from a node:

    #pvecm delnode <hostname_to_be_deleted>
    

    In our example cluster, if we want to remove the node pmx3, we will run the following command from either...