Book Image

Ceph Cookbook

Book Image

Ceph Cookbook

Overview of this book

Ceph is a unified, distributed storage system designed for excellent performance, reliability, and scalability. This cutting-edge technology has been transforming the storage industry, and is evolving rapidly as a leader in software-defined storage space, extending full support to cloud platforms such as Openstack and Cloudstack, including virtualization platforms. It is the most popular storage backend for Openstack, public, and private clouds, so is the first choice for a storage solution. Ceph is backed by RedHat and is developed by a thriving open source community of individual developers as well as several companies across the globe. This book takes you from a basic knowledge of Ceph to an expert understanding of the most advanced features, walking you through building up a production-grade Ceph storage cluster and helping you develop all the skills you need to plan, deploy, and effectively manage your Ceph cluster. Beginning with the basics, you’ll create a Ceph cluster, followed by block, object, and file storage provisioning. Next, you’ll get a step-by-step tutorial on integrating it with OpenStack and building a Dropbox-like object storage solution. We’ll also take a look at federated architecture and CephFS, and you’ll dive into Calamari and VSM for monitoring the Ceph environment. You’ll develop expert knowledge on troubleshooting and benchmarking your Ceph storage cluster. Finally, you’ll get to grips with the best practices to operate Ceph in a production environment.
Table of Contents (18 chapters)
Ceph Cookbook
Credits
Foreword
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Deploying Ceph MDS


To configure the Meta Data Server for the Ceph Filesystem, you should have a running Ceph cluster. In earlier chapters, we learned to deploy the Ceph storage cluster; we will use the same cluster for MDS deployment.

How to do it…

  1. Use ceph-deploy from ceph-node1 to deploy and configure MDS on ceph-node2:

    # ceph-deploy --overwrite-conf mds create ceph-node2
    
  2. The command should deploy the MDS and start its daemon on ceph-node2; however, we need to carry out a few more steps to get CephFS accessible:

    # ssh ceph-node2 service ceph status mds
    
  3. Create data and metadata pools for the Ceph Filesystem:

    # ceph osd pool create cephfs_data 64 64
    # ceph osd pool create cephfs_metadata 64 64
    
  4. Finally, create the Ceph Filesystem; once this command is executed the MDS should attain an active state and CephFS should be ready for use:

    # ceph fs new cephfs cephfs_metadata cephfs_data
    
  5. To verify the status of CephFS and MDS, use the following commands:

    # ceph mds stat
    # ceph fs ls
    
  6. It's recommended...