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Learning Ceph

You're reading from   Learning Ceph Unifed, scalable, and reliable open source storage solution

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Product type Paperback
Published in Oct 2017
Publisher
ISBN-13 9781787127913
Length 340 pages
Edition 2nd Edition
Languages
Tools
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Authors (4):
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Bryan Stillwell Bryan Stillwell
Author Profile Icon Bryan Stillwell
Bryan Stillwell
 Bhembre Bhembre
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Bhembre
 D'Atri D'Atri
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D'Atri
Karan Singh Karan Singh
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Karan Singh
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Toc

Table of Contents (18) Chapters Close

Title Page
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
1. Introducing Ceph Storage FREE CHAPTER 2. Ceph Components and Services 3. Hardware and Network Selection 4. Planning Your Deployment 5. Deploying a Virtual Sandbox Cluster 6. Operations and Maintenance 7. Monitoring Ceph 8. Ceph Architecture: Under the Hood 9. Storage Provisioning with Ceph 10. Integrating Ceph with OpenStack 11. Performance and Stability Tuning

Scaling our Ceph cluster


Now that we have a working Ceph cluster at our disposal we can do all manner of cool things with it. We can add new OSD or mon nodes—or remove existing ones. We can add multiple clients and test performing simultaneous operations against the cluster. We can also add different types of daemons as separate VMs. In short, we can scale the cluster up or scale it down at will. In this section, we will show how easy it is to manipulate the cluster using variables in our configuration files.

Let's revisit the vagrant_variables.yml file that we previously edited to adjust the number of nodes before bootstrapping our cluster. We will tweak the numbers in this file to scale as we wish. Open this file in your favorite editor. Before making changes the variables reflecting your existing nodes should look like this:

mon_vms: 1
osd_vms: 3
mds_vms: 0
rgw_vms: 0
rbd_mirror_vms: 0
client_vms: 1
iscsi_gw_vms: 0
mgr_vms: 0 

We know that one instance of a mon node is a single point of...

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