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

Configuring Nova to attach Ceph RBD


In order to attach the Ceph RBD to OpenStack instances, we should configure the Nova component of OpenStack by adding the RBD user and UUID information that it needs to connect to the Ceph cluster. To do this, we need to edit /etc/nova/nova.conf on the OpenStack node and perform the steps that are given in the following section.

How to do it...

The Cinder service that we configured in the last recipe creates volumes on Ceph, however, to attach these volumes to OpenStack instances, we need to configure Nova:

  1. We have already configured the following options to enable volume attachment:
        rbd_user=cinder
        rbd_secret_uuid= e279566e-bc97-46d0-bd90-68080a2a0ad8
  1. To test this configuration, we will attach the Cinder volume to an OpenStack instance. List the instance and volumes to get the ID:
        # nova list
        # cinder list
  1. Attach the volume to the instance:
# nova volume-attach 31000c20-5847-48eb-b2e3-6b681f5df46c 21bb3f31-6f9e-4d26-9afd-5eec3f450034...