This is a collection of scripts for the use of making backups on a zfs.
backup.cfg (there is an example backup.cfg.def contained in
this repo)backup.bash script (as root) and the backup will be made| variable name | description |
|---|---|
BACKUP_POOL |
the name of the pool on which the backup is stored |
BACKUP_DS_NAMES |
a list of datasets on which the different backups are stored (for more see below) |
SNAPSHOT_NAME |
the name of the snapshot which then is transferred to the backup device |
ARRAY_SET |
a list of all datasets that should be backupped (full path starting from the pool is required) |
The amount of items in this list descide how many backups are left on the
backup-pool (e.g. "bak1" "bak2" means that there will always be two backups,
the previous one and the current one)
To successfully run the backup.bash, the datasets specified as
backupDsNames all have to exist. In addition, on each of these sets there have
to be datasets with the same name/path as the ones you want to back up.
Example: BACKUP_POOL=backup ; BACKUP_DS_NAMES=("bak1" "bak2") ; ARRAY_SET=("data/daten data/home")
then the Datasets backup/bak1, backup/bak2, backup/bak1/daten,
backup/bak1/home, backup/bak2/daten and backup/bak2/home have to exist.
Hint: By running backup.bash with the -n flag, the script automatically
detects missing datasets (and snapshots) which are needed before creating the
backup and creates them.
In case you're using encypted datasets, these need to be mounted before running
zfs send | zfs recv. In case an encrypted dataset is not mounted, the
backup.bash script will try to mount it (and you will need to provide the
passphrase for the decryption).
Just a small snippet of lua (using the date library) for calculating when
the replication is finished (or when it should be finished)
function foo(sent)
now = date()
-- insert the start time/date here (if you do this later, you can check the
-- change date of `stat.txt` and/or the timestamp should also be included in
-- the console output)
start = date(2024, 3, 4, 17, 46, 8)
total_s = (now - start):spanseconds() * (379 / sent)
return start:copy():addseconds(total_s)
endA huge thank you to Galatheas for pointing me to zfs and the basic framework of
the backup.bash script originates from him too