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Chapter 1. Introduction

This document describes how to configure OpenStack to use one or more Dell EMC PS Series back ends. It also includes instructions on addressing volume size discrepancies between Dell EMC PS Series devices and the OpenStack Block Storage service.

The following sections assume that:

  • You intend to use only Dell EMC PS Series devices and drivers for Block Storage back ends
  • The OpenStack Overcloud has already been deployed through Director, with a properly-functional Block Storage service
  • The Dell storage device has already been deployed and configured as a storage repository
  • A Dell EMC PS Series Group is already deployed and accessible through SSH
  • You have the necessary credentials for connecting to the Group manager of the available Dell EMC PS Series Group (namely, CHAP and Group manager credentials)
  • You have the username and password of an account with elevated privileges. You can use the same account that was created to deploy the Overcloud; in Creating the stack user, we create and use the stack user for this purpose.

When you deploy Red Hat OpenStack Platform (RHOSP) through director, you must also define and orchestrate all major overcloud settings through director, in particular, the Block Storage service back end. This ensures that the settings persist through any further overcloud updates. For more information about deploying OpenStack through the Director, see Director Installation and Usage.

The purpose of this document is to explain how to orchestrate your Dell EqualLogic back end configuration to the overcloud Block Storage service. This document does not discuss the different deployment configurations that are possible with the back end. To learn more about the different available deployment configurations, see the product documentation of your device.

When you are familiar with the resulting back end configuration you want to deploy, and its corresponding settings, see this document for instructions about how to orchestrate it through director.

Note

At present, the Director only has the integrated components to deploy a single instance of a Dell EqualLogic back end. As such, this document only describes the deployment of a single back end.

Deploying multiple instances of a Dell EqualLogic back end requires a custom back end configuration. See the Custom Block Storage Back End Deployment Guide for instructions.

Before deploying Red Hat OpenStack Platform (RHOSP) with a Dell Storage Center back end, review the following limitations:

  • For Dell EMC SC Series, snapshots of empty non-attached volumes are not supported. You must populate the volume or attach the volume before proceeding with snapshots. For more information, see https://bugs.launchpad.net/cinder/+bug/1616630.
  • For Dell EMC SC Series, cinder backup is not supported.
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