DAR2
Maintainer
Darrel May (Contrib)
Version
Description
This contrib uses dar (http://dar.linux.free.fr) to create a feature rich backup system for smeserver 7.x. It adds a server-manager panel (Backup > Disk ARchive) to define, schedule and launch server backups and restores, including full disaster recovery, to and from network shares or an attached local disk. The destination network share can be any accessible network mapped drive. Another server, pc workstation or network attached hard drive. The destination local disk can be any mountable hard disk. IDE/SCSI/SATA/USB. In addition an unlimited number of custom backups may be scheduled.
Installation
- for sme8
To install this contribs issue the following command on the SME Server shell:
yum install smeserver-dar2 --enablerepo=smecontribs
- for sme9
You have to enable the stephdl repository. see bugzilla:8508
yum install smeserver-dar2 --enablerepo=stephdl signal-event post-upgrade;signal-event reboot
Usage
The contrib adds a server-manager panel labeled 'Backup > Disk ARchive'. All backup and restore operations may be performed using this panel. Usage instructions are detailed in the panel text.
Additional information
The dar utility is available for a number of platforms, including Windows. The Windows Version is command-line only, with no graphical view of files for restoring. A graphical interface (kdar) is available for Linux platforms.
Sample e-mail sent after scheduled backup job completes
Date: 10 Jun 2008 04:30:06 -0000 From: Cron Daemon <root@domain.com> Subject: Cron <root@sme> /etc/e-smith/events/actions/dar2-backup 911 To: root@domain.com
Connecting /mnt/dar2/911 to //station1/dar2 Expanding /etc/dar2/911 template Creating /mnt/dar2/911/sme.myezserver.com/911/db.zip Expiring old backups Executing pre-backup event Verbose logging is off Performing 911 backup No terminal found for user interaction. All questions will be assumed a negative answer (less destructive choice), which most of the time will abort the program.
-------------------------------------------- 47707 inode(s) saved with 4 hard link(s) recorded 0 inode(s) changed at the moment of the backup 0 inode(s) not saved (no inode/file change) 0 inode(s) failed to save (filesystem error) 259 inode(s) ignored (excluded by filters) 0 inode(s) recorded as deleted from reference backup -------------------------------------------- Total number of inode considered: 47966 --------------------------------------------
Listing 911 archives on target: total 9331906 -rwxr-xr-x 1 root root 681574400 Jun 6 23:44 2008.06.06.1.dar -rwxr-xr-x 1 root root 681574400 Jun 7 00:00 2008.06.06.2.dar -rwxr-xr-x 1 root root 681574400 Jun 7 00:16 2008.06.06.3.dar -rwxr-xr-x 1 root root 343344717 Jun 7 00:24 2008.06.06.4.dar -rwxr-xr-x 1 root root 681574400 Jun 7 23:44 2008.06.07.1.dar -rwxr-xr-x 1 root root 681574400 Jun 8 00:00 2008.06.07.2.dar -rwxr-xr-x 1 root root 681574400 Jun 8 00:16 2008.06.07.3.dar -rwxr-xr-x 1 root root 343679423 Jun 8 00:25 2008.06.07.4.dar -rwxr-xr-x 1 root root 681574400 Jun 8 23:45 2008.06.08.1.dar -rwxr-xr-x 1 root root 681574400 Jun 9 00:00 2008.06.08.2.dar -rwxr-xr-x 1 root root 681574400 Jun 9 00:18 2008.06.08.3.dar -rwxr-xr-x 1 root root 344188465 Jun 9 00:26 2008.06.08.4.dar -rwxr-xr-x 1 root root 681574400 Jun 9 23:44 2008.06.09.1.dar -rwxr-xr-x 1 root root 681574400 Jun 10 00:01 2008.06.09.2.dar -rwxr-xr-x 1 root root 681574400 Jun 10 00:16 2008.06.09.3.dar -rwxr-xr-x 1 root root 345723391 Jun 10 00:25 2008.06.09.4.dar -rwxr-xr-x 1 root root 41253 Jun 9 23:30 db.zip
Total target disk space usage: Filesystem Size Used Avail Use% Mounted on //station1/dar2 18G 8.6G 9.2G 49% /mnt/dar2/911
Executing post-backup event Dismounting /mnt/dar2/911
Mon Jun 9 23:30:02 CDT 2008 - backup started Tue Jun 10 00:25:49 CDT 2008 - backup finished
Midnight Commander (MC) dar-extension
With the installation of DAR2 comes an extension for viewing .dar files from within Midnight Commander but it is not installed by default. You can find the files extracted in the /opt/dar2-mc directory. For installation of this extension run the install.sh shell script with:
cd /opt/dar2-mc ./install.sh
DAR2 command line scripts
Located in /etc/e-smith/events/actions/
dar2-backup = script that performs backup
dar2-dr-restore = script that performs a complete disaster recovery restore
dar2-mc = script that launches Midnight Commander and provides access to your archives
dar2-restore = script that performs restore
Manual restore of DAR2 configuration
It is possible to selectively restore the DAR2 configuration (backup job settings etc) from a full system backup. Firstly install the DAR2 contrib on a new server, which will of course have no backup jobs configured.
Then look at the backup file in the backup target location and find a file called db.zip. Extract the dar2 db file and copy it to /home/e-smith/db on the new server, to restore the previous DAR2 configuration.
Known issue
Cifs Error
When using the included backup functionality, or the DAR2 contrib, backing up to a windows remote share generates the following cifs errors. see bugzilla:7341
Feb 12 11:51:25 sme e-smith-bg: Connecting /mnt/dar2/backup to \\192.168.10.30\bkp Feb 12 11:51:25 sme kernel: CIFS VFS: Send error in SessSetup = -12 Feb 12 11:51:25 sme kernel: CIFS VFS: cifs_mount failed w/return code = -12 Feb 12 11:51:25 sme e-smith-bg: mount error(12): Cannot allocate memory Feb 12 11:51:25 sme e-smith-bg: Refer to the mount.cifs
The solution could be to modify the windows registry by the file below
Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management] "LargeSystemCache"=dword:00000001 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\LanmanServer\Parameters] "Size"=dword:00000003
Save the content above in a file with the name W7-backup.reg and import it in the windows registry, restart the service or the Windows computer
Bugs
Please raise bugs under the SME-Contribs section in dar2 and select the smeserver-dar2 component or use this link .
Check installed version
yum info installed smeserver-dar2