Chapter 1. Introduction
This document pertains to the deployment and use of native CephFS to provide self-service Shared File Systems service (manila) in your Red Hat OpenStack Platform Cloud through the native CephFS NAS protocol. This type of deployment requires guest VM access to Ceph public network and infrastructure. Red Hat recommends that you deploy native CephFS with trusted OpenStack Platform tenants only, because it requires a permissive trust model that is not suitable for general purpose OpenStack Platform deployments.
For general purpose OpenStack Platform deployments that use a conventional tenant trust model, you can deploy CephFS through the NFS protocol. For more information about trust models, see Security considerations.
For more information about using CephFS through NFS, see Deploying the Shared File Systems service with CephFS through NFS.
With the Shared File Systems service (manila), you can provision shared file systems that multiple compute instances, bare metal nodes, or containers can consume.
CephFS is the highly scalable, open-source, distributed file system component of Ceph, a unified distributed storage platform. Ceph Storage implements object, block, and file storage using Reliable Autonomic Distributed Object Store (RADOS). CephFS, which is POSIX compatible, provides file access to a Ceph Storage cluster.
The Shared File Systems service enables users to create shares in CephFS and access them using the native Ceph File System protocol. The Shared File Systems service manages the life cycle of these shares from within OpenStack.
With this release, director can deploy the Shared File Systems with a native CephFS back end on the overcloud.
