Book Image

Ceph: Designing and Implementing Scalable Storage Systems

By : Michael Hackett, Vikhyat Umrao, Karan Singh, Nick Fisk, Anthony D'Atri, Vaibhav Bhembre
Book Image

Ceph: Designing and Implementing Scalable Storage Systems

By: Michael Hackett, Vikhyat Umrao, Karan Singh, Nick Fisk, Anthony D'Atri, Vaibhav Bhembre

Overview of this book

This Learning Path takes you through the basics of Ceph all the way to gaining in-depth understanding of its advanced features. You’ll gather skills to plan, deploy, and manage your Ceph cluster. After an introduction to the Ceph architecture and its core projects, you’ll be able to set up a Ceph cluster and learn how to monitor its health, improve its performance, and troubleshoot any issues. By following the step-by-step approach of this Learning Path, you’ll learn how Ceph integrates with OpenStack, Glance, Manila, Swift, and Cinder. With knowledge of federated architecture and CephFS, you’ll use Calamari and VSM to monitor the Ceph environment. In the upcoming chapters, you’ll study the key areas of Ceph, including BlueStore, erasure coding, and cache tiering. More specifically, you’ll discover what they can do for your storage system. In the concluding chapters, you will develop applications that use Librados and distributed computations with shared object classes, and see how Ceph and its supporting infrastructure can be optimized. By the end of this Learning Path, you'll have the practical knowledge of operating Ceph in a production environment. This Learning Path includes content from the following Packt products: • Ceph Cookbook by Michael Hackett, Vikhyat Umrao and Karan Singh • Mastering Ceph by Nick Fisk • Learning Ceph, Second Edition by Anthony D'Atri, Vaibhav Bhembre and Karan Singh
Table of Contents (27 chapters)
Title Page
About Packt
Contributors
Preface
Index

Scaling out your Ceph cluster


From the roots, Ceph has been designed to grow from a few nodes to several hundreds, and it's supposed to scale on the fly without any downtime. In this recipe, we will dive deep into the Ceph scale-out feature by adding MON, OSD, MDS, and RGW nodes.

How to do it...

Scaling out a Ceph cluster is important as the need for increased capacity in the cluster grows. Let's walk through expanding several areas of the Ceph cluster:

Adding the Ceph OSD

Adding an OSD node to the Ceph cluster is an online process. To demonstrate this, we require a new virtual machine named ceph-node4 with three disks that will act as OSDs. This new node will then be added to our existing Ceph cluster.

Run the following commands from ceph-node1 until otherwise specified from any other node:

  1. Create a new node, ceph-node4, with three disks (OSD). You can follow the process of creating a new virtual machine with disks and the OS configuration, as mentioned in the Setting up a virtual infrastructure...