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Proxmox High Availability

Chapter 2. Getting Started with a High Availability (HA) Environment

After Chapter 1, Basic Concepts of a Proxmox Virtual Environment, you might be excited to know how much more can we do with the help of Proxmox. Maybe you are already planning to virtualize your existing server with the help of Proxmox. Wait! Isn't it dangerous to centralize all servers in one physical machine? If you are an experienced system administrator, you must've been told to avoid a single point of failure; you have to minimize the number of services on a physical machine. We are now violating this rule; how should we solve this problem? In this chapter, we will cover the following topics:

What is a high availability environment?
Introducing a Proxmox VE cluster
Hardware requirements for a Proxmox cluster
How does Proxmox provide HA capacity?

Introducing a Proxmox VE cluster

Now, we have some idea about how to measure the availability level for a server; increasing the availability is very important for us. Is it possible for Proxmox to deal with this task? Yes, of course, but it is only available in cluster mode. The basic difference between single instance versus clusters under Proxmox is as follows:

Product	Proxmox VE	Proxmox VE Cluster
Number of nodes	1	2 (minimum)
Quorum disk	No	Yes
Storage	Local	Shared
HA	No	Yes

Unlike running with a single Proxmox instance, we need to provide shared storage for the cluster to keep the data of virtual machines. In our configuration, we would like to use a package called DRBD, which allows us to use local storage from both servers to form a shared RAID 1 storage. The data synchronization will automatically be managed by the DRBD package. So, we don't need to purchase additional network storage for our testing.

Introduction to DRBD

DRBD is a short form for Distributed Replicated...

Description

If you want to know the secrets of virtualization and how to implement high availability on your services, this is the book for you. For those of you who are already using Proxmox, this book offers you the chance to build a high availability cluster with a distributed filesystem to further protect your system from failure.

What you will learn

Design and plan a high availability cluster from scratch with guidelines on hardware and software preparation

Work with the Proxmox virtual environment and learn the concepts on KVM and openVZ

Build your own network RAID 1 device with DRBD technology from concepts to practical approach

Install, configure, and integrate distributed filesystems with Gluster and Ceph on Proxmox

Test and troubleshoot different levels of system failures for the Proxmox cluster

Migrate your existing system over different platforms including Windows, Linux, and even virtualized platforms like as VMware

Perform recovery for a failed Proxmox cluster from backup configuration files

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Tom Jan 14, 2015

Proxmox High Availability is maybe not a book for beginners who are testing their first virtualization setups (although it covers some basics), but for admins that already have some experience in this environment.It definitely gives good advice as well as really good hints and examples in setting up clustered servers.What I do like most about the book is that it does not only explain Proxmox itself but also how to install drdb, glusterfs, (clustered filesystems) etc..So everything you need to build a complex and robust environment is included here.

Amazon Verified review

Matteo Jan 19, 2015

This is a good book to start using and planning/designing Proxmox clusters, giving you all the basics on storage, networking and compute setup for creating a safe and reliable enviroment, avoiding design and implementation errors if you are not a Proxmox expert. This book is also a good starting point to evaluate virtualization at low cost for home/SME enviroments without the CAPEX of VMware or Hyper-V. There are some minor faults with some diagrams but nothing major, use the book as a starting point for your lab and grow your skills over time

Juan Vicente Herrera Ruiz de Alejo Jan 13, 2015

This book, Proxmox High Availability, is recommended for people that have expertise working with ProxmoxYou can find a detailed explanation about how to getting started to build a Proxmox HA environment with Proxmox VE Cluster, a useful explanation about how to migrate an existing system to a VE Cluster, disaster recovery of the cluster and a last section about troubleshooting.It is a well written book with practical and real examples and definitely worth a shot.

k0d3g3ar Mar 12, 2015

Good book. Definitely a must have for anyone doing more than 1 Proxmox server installation. However if you are just new to the topic, this is probably way too much detail. Also I found it lacking when dealing with troubleshooting clustering in PM. This is a big topic that most admins need some help with. A really good approach to troubleshooting in the book would go a long way to help here. Otherwise its solid, complete and well worth investing in.

Proxmox High Availability: Discover how to introduce, design, and implement high availability clusters for your business without hassle

What do you get with Print?

Proxmox High Availability

Chapter 2. Getting Started with a High Availability (HA) Environment

What is a high availability (HA) environment?

What is availability?

Note

Introducing a Proxmox VE cluster

Introduction to DRBD

System requirements for the Proxmox cluster

HA capability for Proxmox with a two-node cluster

Summary

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