BackupRestorePlugin < TWiki

This is a solution to backup, restore, and upgrade TWiki sites. It can be used via the browser and on the command line. This plugin is pre-installed in TWiki-5.1 and later releases. It can be installed in older TWiki releases as oldas TWiki-2001-09-01 (Athens Release) to easily create a backup that can be restored on a new TWiki release. This offers an easy upgrade path for TWiki.

This plugin backs up page data, attachment data, the plugin workspace area, and the TWiki configuration. However, it does not backup the TWiki engine, additional plugins, and skins you might have installed. It is recommended to do a manual backup of the whole twiki directory after installing plugins and skins.

Web-based Operation

The backup and restore functionality is restricted to members of the TWikiAdminGroup.

How to Upgrade TWiki

The TWikiUpgradeGuide describes how to manually upgrade TWiki. It is much easier to use the BackupRestorePlugin to do a TWiki upgrade. Follow these steps:

Screenshot of Backup & Restore Console, detail view of very old TWiki-01-Sep-2001 backup:

Command Line Utility and Cron

The backuprestore utility can be used to create a backup (scheduled or manually), to copy a backup, and to check on the status of the backup process.

Command	Description
`./backuprestore status`	Show backup status. Returns `backup_status: 1` if web-based backup is in progress.
`./backuprestore create_backup`	Create a backup. This is done without a background daemon process, e.g. the script returns when the backup is done.
`./backuprestore download_backup <name.zip>`	Dump a backup file to STDOUT. If called as CGI script, download a backup file.

Scheduled backups can be done with a cron job

. Example crontab entry that creates a backup at 10 minutes past midnight every Sunday:

Make sure the plugin is configured properly before creating backups. The backup destination can be local or remote. If remote, the remote server needs to be mounted on the TWiki server via NFS or the like.

Specification

Syntax Rules

This section is only relevant to plugin developers. This plugin handles a %BACKUPRESTORE{"..."}% variable to perform all web-based operations. The variable is used in the BackupRestoreConsole page.

This plugin starts a daemon (background process) when a backup is started. Status is checked via Ajax calls. Once the new backup is finished it shows up in the backup table.

Parameter	Explanation	Default
`action="..."`	Action to take: • `""` (empty) - show backup overview console. • `"backup_detail"` - show backup detail console. • `"create_backup"` - start new backup. • `"cancel_backup"` - cancel backup in progress. • `"delete_backup"` - delete a backup. • `"restore_backup"` - restore from a backup. • `"status"` - show backup status (1: backup in progress). • `"debug"` - debug and diagnostics.	`""` (empty)
`file="..."`	Name of backup file to take action. The `file` parameter is required for the following actions: `"backup_detail"`, `"delete_backup"` and `"restore_backup"`.	`""`

Limitations and To-Do

License and Bug Reporting

This plugin has been reasonably tested. If you find any issues please file a bug report at TWikibug:BackupRestorePlugin

This plugin is distributed under GPL (GNU General Public License

) in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.

Plugin Installation & Configuration

This plugin is pre-installed from TWiki-5.1 on. TWiki administrators can upgrade the plugin as needed on the TWiki server.

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For an automated installation, run the configure script and follow "Find More Extensions" in the in the Extensions section.

Or, follow these manual installation steps:

Download the ZIP file from the Plugins home (see below).

Unzip BackupRestorePlugin.zip in your twiki installation directory. Content:

File:	Description:
`bin/backuprestore`	CGI/command line utility
`data/TWiki/BackupRestorePlugin.txt`	Plugin topic
`data/TWiki/BackupRestoreConsole.txt`	Backup and restore console topic
`lib/TWiki/Plugins/BackupRestorePlugin.pm`	Plugin Perl module
`lib/TWiki/Plugins/BackupRestorePlugin/CaptureOutput.pm`	Perl module
`lib/TWiki/Plugins/BackupRestorePlugin/Core.pm`	Core backup module
`lib/TWiki/Plugins/BackupRestorePlugin/ProcDaemon.pm`	Perl module

Set the ownership of the extracted directories and files to the webserver user.

If the server has an OS other than Linux make sure to install the GNU zip utility. On Windows, install GNU Zip for Windows, http://gnuwin32.sourceforge.net/packages/zip.htm

Plugin configuration and testing:

Run the configure script and enable the plugin in the Plugins section.

Configure additional BackupRestorePlugin settings in the Extensions section.
Alternatively, add the following to twiki/lib/LocalSite.cfg and customize as needed:

  # Path to backup destination directory. Can be a volume mounted to the file system.
  $TWiki::cfg{Plugins}{BackupRestorePlugin}{BackupDir} = '/tmp';
  # Keep number of backups (e.g. delete old backups), 0 to keep all.
  $TWiki::cfg{Plugins}{BackupRestorePlugin}{KeepNumberOfBackups} = '7';
  # Path to temp directory, used by BackupRestorePlugin daemon for temporary data.
  $TWiki::cfg{Plugins}{BackupRestorePlugin}{TempDir} = '/tmp';
  # Path to zip command with options to recursively archive files and directory.
  $TWiki::cfg{Plugins}{BackupRestorePlugin}{createZipCmd} = '/usr/bin/zip -r';
  # Path to unzip command with options to list all files.
  $TWiki::cfg{Plugins}{BackupRestorePlugin}{listZipCmd} = '/usr/bin/unzip -l';
  # Path to unzip command with options to unzip all files with option to overwrite existing files.
  $TWiki::cfg{Plugins}{BackupRestorePlugin}{unZipCmd} = '/usr/bin/unzip -o';
  # Debug plugin. See output in data/debug.txt
  $TWiki::cfg{Plugins}{BackupRestorePlugin}{Debug} = 0;

If your TWiki is older than TWiki-4.0, create a twiki/lib/LocalSite.cfg file with above $TWiki::cfg settings and end the file with: 1;
If your TWiki is an old TWiki-2001-09-01 (Athens Release), create a twiki/bin/setlib.cfg file with this content:
```
  my $twikiLibPath = "/path/to/your/twiki/lib";
  unshift @INC, $twikiLibPath;
  1;
```
If your TWiki is older than TWiki-4.2, create a working directory in the twiki root (same level as twiki/lib), and set ownership to the webserver user.
Test if the installation was successful: See BackupRestoreConsole.

Plugin Info

Plugin Author:	TWiki:Main.PeterThoeny, TWiki.org
Copyright:	© 2011-2013 TWiki:Main.PeterThoeny © 2011-2013 TWiki:TWiki.TWikiContributor © 2004, 2005 Simon Flack (for CPAN:IO::CaptureOutput) © 2007, 2008 David Golden (for CPAN:IO::CaptureOutput) © 1997-2011 by Earl Hood and Detlef Pilzecker (for CPAN:Proc::Daemon)
License:	GPL (GNU General Public License )
Plugin Version:	2013-02-16

Show Change History

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2013-02-16:	TWikibug:Item7091: Use TWISTY in installation instructions section and change history
2012-09-03:	TWikibug:Item6837: Doc update with zip utility limitation of 4GB
2012-01-13:	TWikibug:Item6796: Fixing copyright year to 2012
2011-12-19:	TWikibug:Item6799: Improved docs on GNU zip dependency
2011-09-13:	TWikibug:Item6796: Improved docs on command line use
2011-09-05:	TWikibug:Item6795: Add restore from backup functionality; upgrade old system topics on restore of old TWiki; describe how to upgrade TWiki
2011-08-17:	TWikibug:Item6793: Avoid or work around newer APIs to make plugin run on old TWiki-2001-09-01 (Athens Release) for backup
2011-08-16:	TWikibug:Item6793: Add screenshot; add Config.spec configure file; proper detection of command line mode also for older TWiki versions; use TWiki::Func::registerTagHandler only if available so that plugin can run in older TWiki versions
2011-08-15:	TWikibug:Item6793: Better error handling; add magic number to download URL to restrict download of backups to TWiki admins only
2011-08-12:	TWikibug:Item6631: Initial version

TWiki Dependency:	$TWiki::Plugins::VERSION 1.0
CPAN Dependencies:	none (`Proc::Daemon` included as `TWiki::Plugins::BackupRestorePlugin::ProcDaemon`) (`IO::CaptureOutput` included as `TWiki::Plugins::BackupRestorePlugin::CaptureOutput` )
Other Dependencies:	GNU `zip` and `unzip` command line utilities
Perl Version:	5.005
TWiki:Plugins.Benchmark:	GoodStyle nn%, FormattedSearch nn%, BackupRestorePlugin nn%
Plugin Home:	http://TWiki.org/cgi-bin/view/Plugins/BackupRestorePlugin
Feedback:	http://TWiki.org/cgi-bin/view/Plugins/BackupRestorePluginDev
Appraisal:	http://TWiki.org/cgi-bin/view/Plugins/BackupRestorePluginAppraisal

Backup & Restore Plugin - Beta Version

Overview