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Disk-to-Disk Backups with Rsync

Learn how to use Rsync for automated snapshot-style backups with Linux, eliminating the need for tape backups. This guide provides step-by-step instructions and helpful resources for setting up centralized backups and configuring clients.

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Disk-to-Disk Backups with Rsync

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  1. Disk-to-Disk Backups with Rsync Robert Tuck robtuck@cs.rutgers.edu

  2. Background • Cost of disk backup is quickly approaching cost of tape backup • Easy Automated Snapshot-Style Backups with Linux and Rsync • http://www.mikerubel.org/computers/rsync_snapshots/

  3. Our Goals • Eliminate tape backups • Easy setup for clients • No additional users • Rsync is only software necessary * • Backup configs on client • Centralized backups

  4. Backup Mechanics BackUp Server BackUp Client {backup directory} {root} yesterday today tomorrow etc etc etc etc Equal? Equal? BestOS.txt BestOS.txt BestOS.txt BestOS.txt Filesystem Storage …01001110011011000110… No! Yes! File File File’ File’

  5. What’s out there? Rsnapshot (rsnapshot.org) • local rsync, rsync over ssh, rsync server • Simple centralized configuration of all backups Snapback2 (http://www.perusion.com/misc/Snapback2/) • local rsync, rsync over ssh • Feature-rich, centralized configuration of all backups

  6. What we do • Backup organization structure • Rsync “secrets” for login • Client backup configuration is controlled by the client system administrator • Rsync daemon on client

  7. Organization of Backups / backup directory / client name / backup name / structure(s) Name of the backup client Date format : yymmdd.hhmm Backup structures relative to client root

  8. Backup Overview Backup Server Client Exports Rsync “Secrets” directory Runs rsync daemon • Server initiates backup • Generates rsync “secrets” • Gets configuration from client with rsync • Parses configuration and starts backup • Destroys “secrets”

  9. Future? • Windows • Improved restore mechanism • Off-site backup server More Info • http://www.cs.rutgers.edu/lcsr/projects/rsync_backup • http://rsync.samba.org • http://www.mikerubel.org/computers/rsync_snapshots/

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