Book Image

Ceph Cookbook - Second Edition

By : Vikhyat Umrao, Karan Singh, Michael Hackett
Book Image

Ceph Cookbook - Second Edition

By: Vikhyat Umrao, Karan Singh, Michael Hackett

Overview of this book

Ceph is a unified distributed storage system designed for reliability and scalability. This technology has been transforming the software-defined storage industry and is evolving rapidly as a leader with its wide range of support for popular cloud platforms such as OpenStack, and CloudStack, and also for virtualized platforms. Ceph is backed by Red Hat and has been developed by community of developers which has gained immense traction in recent years. This book will guide you right from the basics of Ceph , such as creating blocks, object storage, and filesystem access, to advanced concepts such as cloud integration solutions. The book will also cover practical and easy to implement recipes on CephFS, RGW, and RBD with respect to the major stable release of Ceph Jewel. Towards the end of the book, recipes based on troubleshooting and best practices will help you get to grips with managing Ceph storage in a production environment. By the end of this book, you will have practical, hands-on experience of using Ceph efficiently for your storage requirements.
Table of Contents (15 chapters)

Configuring two-way mirroring

Two-way mirroring requires a rbd-mirror daemon running on both clusters, the primary and the secondary. With two way mirroring it is possible to mirror data or images from the primary site to a secondary site, and the secondary site can mirror data or images back to the primary site.

We will not be demoing this configuration in this book at it is very similar to one-way configuration, but we will highlight the changes needed for two way replication at the pool level, these steps are covered in the one-way replication recipe.

How to do it...

  1. Both clients must have the rbd-mirror installed and running:
        # yum install rbd-mirror
# systemctl enable ceph-rbd-mirror.target
#...