Book Image

Mastering Ceph

By : Nick Fisk
Book Image

Mastering Ceph

By: Nick Fisk

Overview of this book

Mastering Ceph covers all that you need to know to use Ceph effectively. Starting with design goals and planning steps that should be undertaken to ensure successful deployments, you will be guided through to setting up and deploying the Ceph cluster, with the help of orchestration tools. Key areas of Ceph including Bluestore, Erasure coding and cache tiering will be covered with help of examples. Development of applications which use Librados and Distributed computations with shared object classes are also covered. A section on tuning will take you through the process of optimisizing both Ceph and its supporting infrastructure. Finally, you will learn to troubleshoot issues and handle various scenarios where Ceph is likely not to recover on its own. By the end of the book, you will be able to successfully deploy and operate a resilient high performance Ceph cluster.
Table of Contents (12 chapters)

Adding the Ceph Ansible modules

We can use git to clone the Ceph Ansible repository:

    git clone

sudo cp -a ceph-ansible/* /etc/ansible/

The preceding commands gives the following output:

Let's also explore some of the key folders in the git repository:

  • group_vars: We've already covered what lives in here and will explore the possible configuration options in more detail later.
  • infrastructure-playbooks: This directory contains prewritten playbooks to carry out some standard tasks, such as deploying cluster or adding OSDs to an existing one. The comments at the top of the playbooks give a good idea of what they do.
  • roles: This directory contains all the roles that make up the Ceph Ansible modules. You will see that there is a role for each Ceph component, these are what are called via the playbooks to install, configure and maintain Ceph.

In order to be...