CPI

Automatically create (incremental) backups of zfs snapshots on a file server.

Holger Frey 09146ec5f8 updated readme		5 years ago
.gitignore	ignoring temp and key files	5 years ago
README.md	updated readme	5 years ago
old_backup_script	first test	5 years ago
zfs-snapshot-backup.py	added documentation to source file	5 years ago

README.md

zfs-snapshot-backup

Automatically create (incremental) backups of zfs snapshots on a file server.

This is currently tailored only to our setup of a FreeNAS in combination with our virtual server and storage provided by the Rechenzentrum.

The script will create backups of ZFS snapshots for elab journals. The name of the ZFS dataset (from wich the snapshots are created) must start with elabfs- followed by the elab member name, e.g. LukasMetzler

The snapshots should be made with the periodic snapshot task provided by the FreeNAS system. Snapshots should be kept on the NAS for a couple of days (currently one week) to allow transfer errors not to interfere with the backup process.

The backup process should be run after a snapshot is taken. Proposed is to take a daily snapshot at night (currently between 2am and 3am) and start the backup process later via cron (currently set to 4am).

The documentation in our wiki can be found at: https://wiki.cpi.imtek.uni-freiburg.de/CPIvServerDocumentation/ElabOnZfs

restoring backups

copy a snapshot backup to the NAS

cd /mnt/Datenspeicher/snap-backup-dataset/temporary-backups/
scp -i ../backup_key zfs_snap_backup@etha.cpi.imtek.uni-freiburg.de:~/zfs-backups/<backup-file> tmp-backup-file.gz

unzip the backup file and restore it into a dataset

gunzip -c tmep-backup-file.gz | zfs receive -F Datenspeicher/test-backup

remove the (local) backup file
```
rm tmp-backup-file.gz
```