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

Using the Ceph cluster with a hands-on approach


Now that we have a running Ceph cluster, we will perform some hands-on practice to gain experience with Ceph using some basic commands.

How to do it...

Below are some of the common commands used by Ceph admins:

  1. Check the status of your Ceph installation:
      # ceph -s or # ceph status
  1. Check Ceph's health detail:
      # ceph health detail
  1.  Watch the cluster health:
      # ceph -w
  1. Check Ceph's monitor quorum status:
      # ceph quorum_status --format json-pretty
  1. Dump Ceph's monitor information:
      # ceph mon dump
  1. Check the cluster usage status:
      # ceph df
  1.  Check the Ceph monitor, OSD, pool, and placement group stats:
      # ceph mon stat
      # ceph osd stat
      # ceph osd pool stats
      # ceph pg stat
  1. List the placement group:
      # ceph pg dump
  1.  List the Ceph pools in detail:
      # ceph osd pool ls detail
  1.  Check the CRUSH map view of OSDs:
      # ceph osd tree
  1. Check Ceph's OSD usage:
      # ceph osd df
  1. List the cluster authentication keys:
      # ceph auth list

These were some basic commands that you learned in this section. In the upcoming chapters, you will learn advanced commands for Ceph cluster management.