making Rsnapshot backup to mount NFS-Share

Franzel · 11. Dezember 2016

Hello,

I am using OMV 3.x it is working fine.
I use rsnapshot for backup to a NFS-mounted directory. But when the remote NFS-server is not running, rsnapshot make the backup to the unmount base-directory. How can I "tell" rsnapshot, only backup files, when there exists the NFS-mount?

Regards
Franz

subzero79 · 11. Dezember 2016

Zitat von Franzel

How can I "tell" rsnapshot, only backup files, when there exists the NFS-mount?

There is linux/unix utility called autofs, it mounts the requested remote directory on access, after a while it times out and disconnects the share removing the folder also if there is no process accessing it. I can't find options in the rsnapshot man something like check if target directory exists first, but you can give it a try, maybe rsnapshot does it already checks if path exists first. I would check this before proceeding to configure autofs which is not easy to understand at the beginning

Here you can find a guide for ubuntu

https://help.ubuntu.com/community/Autofs

Franzel · 11. Dezember 2016

@subzero79

thanks for your answer. Autofs was my first inspiration too, but I did not realized that AutoFS removes the base directory when the mount is not used. I think this a solution ...
I know how to use AutoFs. It it so easy to use.
I will try it later ( backups are running now ...)
Thanks for the hint

a few minutes later ...
It is not working;-)
Rsnapshot creates the missing base directory ...

Franz

subzero79 · 11. Dezember 2016

Then you'll have to script rsnapshot task to test if the server is alive before running.

Franzel · 11. Dezember 2016

I think for a "quick & dirty" processing, I will modify the rsnapshot script ...
Then I will think about a better way.

But not today ... friends are coming...

I will report here!

Have a nice day
Franz

Franzel · 11. Dezember 2016

I remove the nfs mount statement from fstab.
I installed autofs.

Code: /etc/auto.master

/media/bcffb16c-a3a2-40a0-995c-c98781c15ed3/synology /etc/auto.synology --timeout=5 --ghost

Code: /etc/auto.synology

NFS -fstype=nfs,rw 10.1.10.13:/volume2/OMV

when autofs mounts my nfs-share, the directory /media/.../synology/NFS exists otherwise not.

Code: /var/lib/openmediavault/cron.d/rsnapshot

# backup /media/bcffb16c-a3a2-40a0-995c-c98781c15ed3/extra/ to /media/bcffb16c-a3a2-40a0-995c-c98781c15ed3/synology/NFS/
skip=false
#
# new from here
#
BackupDir=/media/bcffb16c-a3a2-40a0-995c-c98781c15ed3/synology/NFS/
if [ !  -d $BackupDir ]; then 
   echo "NFS Directory not found"
   echo "canceled ;-)"
fi
#
# until here 
#
if [ "$1" = "hourly" ]; then skip=true; fi
if [ "$1" = "yearly" ]; then skip=true; fi
if [ "$2" = "78904383-b790-4261-b895-1ce5dc0eaed8" ] || ([ -z "$2" ] && [ $skip = false ]) &&  [  -d $BackupDir ]; then
	targetdir="/media/bcffb16c-a3a2-40a0-995c-c98781c15ed3/synology/NFS//KAI-EXTRA/extra/"
#
#in the 3rd IF the last "&&  [  -d $BackupDir ]" is added
#

Alles anzeigen

I create a new variable "BackupDir" and test it in the line, where rsnapshot decides which rsnapshot-task should start (3rd if-statement). I make short output on the console-terminal, if the directory is not found.
If I change the rsnapshot settings with the WebGui, I must to redo it. I have to search die building-commands from the WebGui.
But for now it is working for me.

Franz

making Rsnapshot backup to mount NFS-Share

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