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 pools for RBD mirroring with one way replication


RBD mirroring is configured by enabling it on a pool basis in a primary and secondary Ceph cluster. There are two modes that can be configured with RBD mirroring depending on what level of data you choose to mirror. Note that the enabled RBD mirroring configuration must be the same per pool on primary and secondary clusters.

  • Pool mode: Any image in a pool with journaling enabled is mirrored to the secondary cluster.
  • Image mode: Only specifically chosen images with mirroring enabled will be mirrored to the secondary cluster. This requires the image to have mirroring enabled for it.

How to do it...

Before any data can be mirrored from the Ceph cluster to the backup cluster we first need install the rbd-mirror daemon on the backup cluster, enable mirroring on the data pool and then add a peer cluster to the pool:

  1. On ceph-node5 in the backup cluster install and configure the rbd-mirror. The client ID of remote (our user) is what the rbd...