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Ceph Cookbook - Second Edition by Karan Singh, Michael Hackett, Vikhyat Umrao

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Introduction

Now that you have reviewed the Ceph Cookbook – Second Edition and gone through the recipes in this book to familiarize yourself with Ceph Jewel and the changes that came in the Ceph Jewel release, it's time to upgrade your current running production cluster from Ceph Hammer to the latest stable Jewel! In this chapter, we will be demonstrating the online rolling update process to take you from the Hammer release (0.94.10) to Jewel. We will be upgrading each node in the cluster sequentially, only proceeding to the next node after the previous node is done. It is recommended that you update the Ceph cluster nodes in the following order:

  1. Monitor nodes.
  2. OSD nodes.
  3. MDS nodes.

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