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Chapter 1. Introduction
This feature is available in this release as a Technology Preview, and therefore is not fully supported by Red Hat. It should only be used for testing, and should not be deployed in a production environment. For more information about Technology Preview features, see Scope of Coverage Details.
You can back up the state of the Red Hat OpenStack Platform 10 undercloud and overcloud Controller nodes, hereinafter referred to as Control Plane nodes, before updates and upgrades. You can restore the undercloud and the overcloud Control Plane nodes to their previous state if an error occurs during an update or upgrade.
This procedure does not support backing up and restoring Control Plane nodes with hyperconverged or co-located Red Hat Ceph Storage monitor daemons. This scenario arises when Red Hat OpenStack Platform director deploys Ceph Storage.
1.1. Background
The Undercloud and Control Plane Back Up and Restore procedure uses the open source Relax and Recover (ReaR) disaster recovery solution, written in Bash. ReaR creates a bootable image consisting of the latest state of an undercloud or a Control Plane node. ReaR also enables a system administrator to select files for backup.
ReaR supports numerous boot media formats, including:
- ISO
- USB
- eSATA
- PXE
The examples in this document were tested using the ISO boot format.
ReaR can transport the boot images using multiple protocols, including:
- HTTP/HTTPS
- SSH/SCP
- FTP/SFTP
- NFS
- CIFS (SMB)
For the purposes of backing up and restoring the Red Hat OpenStack Platform 10 undercloud and overcloud Control Plane nodes, the examples in this document were tested using NFS.
1.2. Back Up Management Options
ReaR can use both internal and external back up management options.
Internal Back Up Management
Internal back up options include:
-
tar -
rsync
External Back Up Management
External back up management options include both open source and proprietary solutions. Open source solutions include:
- Bacula
- Bareos
Proprietary solutions include:
- EMC NetWorker (Legato)
- HP DataProtector
- IBM Tivoli Storage Manager (TSM)
- Symantec NetBackup
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