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Introduction

Relax-and-Recover is the leading Open Source bare metal disaster recovery solution. It is a modular framework with many ready-to-go workflows for common situations.

Relax-and-Recover produces a bootable image which can recreate the system’s original storage layout. Once that is done it initiates a restore from backup. Since the storage layout can be modified prior to recovery, and disimilar hardware and virtualization is supported, Relax-and-Recover offers the flexibility to be used for complex system migrations.

Currently Relax-and-Recover supports various boot media (incl. ISO, PXE, OBDR tape, USB or eSATA storage), a variety of network protocols (incl. sftp, ftp, http, nfs, cifs) as well as a multitude of backup strategies (incl. IBM TSM, HP Data Protector, Symantec NetBackup, EMC NetWorker [Legato], SEP Sesam, Galaxy [Simpana], Bacula, Bareos, RBME, rsync, duplicity, Borg).

Relax-and-Recover was designed to be easy to set up, requires no maintenance and is there to assist when disaster strikes. Its setup-and-forget nature removes any excuse for not having a disaster recovery solution implemented.

Recovering from disaster is made very straight-forward by a 2-step recovery process so that it can be executed by operational teams when required. When used interactively (e.g. when used for migrating systems), menus help make decisions to restore to a new (hardware) environment.

Extending and integrating Relax-and-Recover into complex environments is made possible by its modular framework. Consistent logging and optionally extended output help understand the concepts behind Relax-and-Recover, troubleshoot during initial configuration and help debug during integration.

Professional services and support are available.

Relax-and-Recover project

The support and development of the Relax-and-Recover project takes place on Github:

Relax-and-Recover website

http://relax-and-recover.org/

Github project

http://github.com/rear/rear/

In case you have questions, ideas or feedback about this document, you can contact the development team on the Relax-and-Recover mailinglist at: rear-users@lists.relax-and-recover.org.

Note
Note that you have to be subscribed to be able to send mails to the Relax-and-Recover mailinglist. You can subscribe to the list at: http://lists.relax-and-recover.org/mailman/listinfo/rear-users

Design concepts

Based on experience from previous projects, a set of design principles were defined, and improved over time:

  • Focus on easy and automated disaster recovery

  • Modular design, focused on system administrators

  • For Linux (and possibly Unix operating systems)

  • Few external dependencies (Bash and standard Unix tools)

  • Easy to use and easy to extend

  • Easy to integrate with real backup software

The goal is to make Relax-and-Recover as least demanding as possible, it will require only the applications necessary to fulfill the job Relax-and-Recover is configured for.

Furthermore, Relax-and-Recover should be platform independent and ideally install just as a set of scripts that utilizes everything that the Linux operating system provides.

Features and functionality

Relax-and-Recover has a wide range of features:

  • Improvements to HP SmartArray and CCISS driver integration

  • Improvements to software RAID integration

  • Disk layout change detection for monitoring

  • One-Button-Disaster-Recovery (OBDR) tape support

  • DRBD filesystem support

  • Bacula or Bareos tape support

  • Multiple DR images per system on single USB storage device

  • USB ext3/ext4 support

  • GRUB[2] bootloader re-implementation

  • UEFI support

  • ebiso support (needed by SLES UEFI ISO booting)

  • Add Relax-and-Recover entry to local GRUB configuration (optional)

  • Nagios and webmin integration

  • Syslinux boot menu

  • Storing rescue/backup logfile on rescue media

  • Restoring to different hardware

  • RHEL5, RHEL6 and RHEL7 support

  • SLES 11 and SLES 12 support

  • Debian and Ubuntu support

  • Various usability improvements

  • Serial console support auto-detected

  • Lockless workflows

  • USB udev integration to trigger mkrescue on inserting USB device

  • Beep/UID led/USB suspend integration

  • Migrate UUID from disks and MAC addressed from network interfaces

  • Integrates with Disaster Recovery Linux Manager (DRLM)

  • Data deduplication with Borg as backend

  • Block device level backup/restore