Hi, I ran in some trouble using restic to back up some data from my NAS.
But first some information about the environment
my NAS run a restic rest server where my Workstations store their backups. (this works fine, backing up and restore are tested fine)
As a 2nd instance of backup, I want us a Raspberry Pi 4 with 2 USB HDDs. The Pi is controlled by a time switch to power on once a week and run the backup as a cron.
I use a bash script to run the restic commands in the cron
restic --repository-file "/home/genchan/.tar_karl" -p "/home/genchan/.restic_karl" unlock restic --repository-file "/home/genchan/.src_simon" --insecure-tls --cache-dir="/mnt/UserData" --password-file "/home/genchan/.restic_simon" copy --from-repository-file "/home/genchan/.tar_karl" --from-password-file "/home/genchan/.restic_karl" restic --repository-file "/home/genchan/.src_karl" --insecure-tls --cache-dir="/mnt/UserData" --password-file "/home/genchan/.restic_karl" copy --from-repository-file "/home/genchan/.tar_karl" --from-password-file "/home/genchan/.restic_karl" restic --repository-file "/home/genchan/.tar_simon" -p "/home/genchan/.restic_simon" forget --keep-within-weekly 1m --prune restic --repository-file "/home/genchan/.tar_karl" -p "/home/genchan/.restic_karl" forget --keep-within-weekly 1m --prune
This part works totally fine. Now I want to add a backup of some data from the NAS itself. It’s about 1TB of media files of the local DLNA service, local web radio and this kind of stuff.
I think an easy way to get the job done is to run restic backup at the Raspberry. I mount the directory to back up from the NAS via sshfs (via fstab)
email@example.com:/mnt/Multimedia /mnt/nas fuse.sshfs default_permissions,noauto,x-systemd.automount,_netdev,IdentityFile=/home/genchan/.ssh/id_rsa,allow_other,reconnect 0 0
now I tried some variations to back up the full mounting point /mnt/nas
At first, I tried the same command as I run on my workstations:
sudo restic --repository-file "/home/genchan/.repo_media" --cache-dir="/mnt/Multimedia" -p "/home/genchan/.restic_media" --files-from "/home/genchan/.backup_media" backup
repository-file = /mnt/Multimedia
for testing, I added not all directories to the .backup_media, only about 30gb. First time a full backup is preforming, but on 2nd execution I also preform a full backup (time to execute all time about 20 min). And before the question comes up, yes restic reports using parent snapshot […]
after some reading, I tried another way
sudo restic --repository-file "/home/genchan/.repo_media" --cache-dir="/mnt/Multimedia" -p "/home/genchan/.restic_media" --exclude-file "/home/genchan/.backup_media" backup /mnt/nas
this time I excluded some directories to get the same 30gb for testing. I got the same issue as in my first try.
I think it could have something to do with the mounting via sshfs, but II have no idea how to fix this. Has someone some ideas on this?
PS: I do some test that confuses me a bit more. I have about 10 directories in /mnt/nas, all are in the exclude file and I use # to add them to the back up one by another. At this moment I got about 2 gb in 3 directories. If I run it twice it works fine but if I wait about 30 min