Book Image

Mastering Ceph - Second Edition

By : Nick Fisk
Book Image

Mastering Ceph - Second Edition

By: Nick Fisk

Overview of this book

Ceph is an open source distributed storage system that is scalable to Exabyte deployments. This second edition of Mastering Ceph takes you a step closer to becoming an expert on Ceph. You’ll get started by understanding the design goals and planning steps that should be undertaken to ensure successful deployments. In the next sections, you’ll be guided through setting up and deploying the Ceph cluster with the help of orchestration tools. This will allow you to witness Ceph’s scalability, erasure coding (data protective) mechanism, and automated data backup features on multiple servers. You’ll then discover more about the key areas of Ceph including BlueStore, erasure coding and cache tiering with the help of examples. Next, you’ll also learn some of the ways to export Ceph into non-native environments and understand some of the pitfalls that you may encounter. The book features a section on tuning that will take you through the process of optimizing both Ceph and its supporting infrastructure. You’ll also learn to develop applications, which use Librados and distributed computations with shared object classes. Toward the concluding chapters, you’ll learn to troubleshoot issues and handle various scenarios where Ceph is not likely to recover on its own. By the end of this book, you’ll be able to master storage management with Ceph and generate solutions for managing your infrastructure.
Table of Contents (18 chapters)
Free Chapter
1
Section 1: Planning And Deployment
6
Section 2: Operating and Tuning
13
Section 3: Troubleshooting and Recovery

Ansible

As mentioned earlier, Ansible will be the orchestration tool of choice for this book, so let's look at it in a bit more detail.

Ansible is an agent-less orchestration tool written in Python that uses SSH to carry out configuration tasks on remote nodes. It was first released in 2012, has gained widespread adoption, and is known for its ease of adoption and low learning curve. Red Hat purchased the commercial company Ansible Inc. in 2015 and so has a very well developed and close-knit integration for deploying Ceph.

Files called playbooks are used in Ansible to describe a list of commands, actions, and configurations to be carried out on specified hosts or groups of hosts and are stored in the yaml file format. Instead of having large unmanageable playbooks, Anisble roles can be created to allow a playbook to contain a single task, which may then carry out a number...