Book Image

Ceph Cookbook - Second Edition

By : Vikhyat Umrao, Karan Singh, Michael Hackett
Book Image

Ceph Cookbook - Second Edition

By: Vikhyat Umrao, Karan Singh, Michael Hackett

Overview of this book

Ceph is a unified distributed storage system designed for reliability and scalability. This technology has been transforming the software-defined storage industry and is evolving rapidly as a leader with its wide range of support for popular cloud platforms such as OpenStack, and CloudStack, and also for virtualized platforms. Ceph is backed by Red Hat and has been developed by community of developers which has gained immense traction in recent years. This book will guide you right from the basics of Ceph , such as creating blocks, object storage, and filesystem access, to advanced concepts such as cloud integration solutions. The book will also cover practical and easy to implement recipes on CephFS, RGW, and RBD with respect to the major stable release of Ceph Jewel. Towards the end of the book, recipes based on troubleshooting and best practices will help you get to grips with managing Ceph storage in a production environment. By the end of this book, you will have practical, hands-on experience of using Ceph efficiently for your storage requirements.
Table of Contents (15 chapters)

Resizing Ceph RBD

Ceph supports thin provisioned block devices, which means that the physical storage space will not get occupied until you begin storing data on the block device. The Ceph Block Device is very flexible; you can increase or decrease the size of an RBD on the fly from the Ceph storage end. However, the underlying filesystem should support resizing. Advance filesystems such as XFS, Btrfs, EXT, ZFS, and others support filesystem resizing to a certain extent. Please follow filesystem specific documentation to know more about resizing.

XFS does not currently support shrinking, Btrfs, and ext4 do support shrinking but should be done with caution!

How to do it...

To increase or decrease the Ceph RBD image size, use...