Ich habe mich damit noch ein wenig beschäftigt, die letzten drei zu behalten, ist nicht so optimal. Da es viele Optionen bei dem Befehl gibt, hier ein Ausschnitt
Flags:
-l, --keep-last n keep the last n snapshots
-H, --keep-hourly n keep the last n hourly snapshots
-d, --keep-daily n keep the last n daily snapshots
-w, --keep-weekly n keep the last n weekly snapshots
-m, --keep-monthly n keep the last n monthly snapshots
-y, --keep-yearly n keep the last n yearly snapshots
habe ich das ein wenig so angepasst, das ich denke es passt für mich.
restic --password-file /root/passwd -r /media/NAS_neu/Restic/Home/ forget --keep-last 3 --keep-monthly 3 --prune
Damit behalte ich auch die jeweils eines pro Monat. Und die letzten drei. Das sieht dann so aus.
root@debian:~# ./backup2.sh
repository 2f3f6147 opened successfully, password is correct
Files: 38 new, 100 changed, 13268 unmodified
Dirs: 0 new, 1 changed, 0 unmodified
Added to the repo: 10.166 GiB
processed 13406 files, 50.324 GiB in 3:24
snapshot 849f614c saved
repository 2f3f6147 opened successfully, password is correct
Applying Policy: keep the last 3 snapshots, 3 monthly snapshots
snapshots for (host [debian], paths [/home/frank]):
keep 5 snapshots:
ID Time Host Tags Reasons Paths
------------------------------------------------------------------------------------
a7251cfd 2019-11-28 17:00:01 debian monthly snapshot /home/frank
283d4027 2019-12-31 17:00:01 debian monthly snapshot /home/frank
ae2b96ec 2020-01-01 21:47:46 debian last snapshot /home/frank
079e00a6 2020-01-02 17:00:01 debian last snapshot /home/frank
849f614c 2020-01-03 21:08:45 debian last snapshot /home/frank
monthly snapshot
------------------------------------------------------------------------------------
5 snapshots
remove 26 snapshots:
ID Time Host Tags Paths
------------------------------------------------------------------
896f16c2 2019-11-07 22:23:40 debian /home/frank
b21bcf6d 2019-11-11 17:00:01 debian /home/frank
f89248fb 2019-11-12 17:00:01 debian /home/frank
123ab546 2019-11-13 17:00:01 debian /home/frank
b82d87d0 2019-11-18 17:00:01 debian /home/frank
040b0ab7 2019-11-19 17:00:01 debian /home/frank
7221d8ef 2019-11-20 17:00:01 debian /home/frank
84132a25 2019-11-21 17:00:01 debian /home/frank
b558a52c 2019-11-25 17:00:01 debian /home/frank
e5cc0c3e 2019-12-02 17:00:01 debian /home/frank
22423fa5 2019-12-03 17:00:01 debian /home/frank
39df1ab9 2019-12-04 17:00:01 debian /home/frank
98843457 2019-12-05 17:00:01 debian /home/frank
b0cdd4b6 2019-12-09 17:00:01 debian /home/frank
828414f9 2019-12-10 17:00:01 debian /home/frank
e34a27c3 2019-12-11 17:00:01 debian /home/frank
6e488c3b 2019-12-12 17:00:01 debian /home/frank
17898403 2019-12-16 17:00:01 debian /home/frank
1973305a 2019-12-17 17:00:01 debian /home/frank
9553bedd 2019-12-18 17:00:01 debian /home/frank
fedf749d 2019-12-19 17:00:01 debian /home/frank
8e7cb876 2019-12-23 17:00:01 debian /home/frank
0bd0d102 2019-12-25 17:00:01 debian /home/frank
13d348b0 2019-12-26 17:00:01 debian /home/frank
c7d960aa 2019-12-30 17:00:01 debian /home/frank
f6ea9118 2020-01-01 17:00:01 debian /home/frank
------------------------------------------------------------------
26 snapshots
26 snapshots have been removed, running prune
counting files in repo
building new index for repo
[0:35] 100.00% 7806 / 7806 packs
repository contains 7806 packs (46537 blobs) with 41.110 GiB
processed 46537 blobs: 0 duplicate blobs, 0 B duplicate
load all snapshots
find data that is still in use for 5 snapshots
[0:01] 100.00% 5 / 5 snapshots
found 32654 of 46537 data blobs still in use, removing 13883 blobs
will remove 0 invalid files
will delete 715 packs and rewrite 752 packs, this frees 5.027 GiB
[2:28] 100.00% 752 / 752 packs rewritten
counting files in repo
[0:01] 100.00% 6571 / 6571 packs
finding old index files
saved new indexes as [d137b425 f7caee99 a6e9711a]
remove 35 old index files
[1:13] 100.00% 1467 / 1467 packs deleted
done
using temporary cache in /tmp/restic-check-cache-916655151
repository 2f3f6147 opened successfully, password is correct
created new cache in /tmp/restic-check-cache-916655151
create exclusive lock for repository
load indexes
check all packs
check snapshots, trees and blobs
read all data
[7:47] 100.00% 6571 / 6571 items
duration: 7:47
no errors were found
root@debian:~#
Am Ende seht ihr noch, wie Restic alle Files testet. Mein Script sieht jetzt so aus.
#!/bin/bash
# Script um mit Restic Daten automatisiert zu sichern!
# Dient zum Sichern der Homepartition auf dem ROCKPro64 NAS!
# Was soll gesichert werden?
backup_pfad=/home/frank
# Programm Start
restic --password-file /root/passwd -r /media/NAS_neu/Restic/Home/ backup $backup_pfad --exclude-file=excludes.txt
restic --password-file /root/passwd -r /media/NAS_neu/Restic/Home/ forget --keep-last 3 --keep-monthly 3 --prune
# Testen
restic --password-file /root/passwd -r /media/NAS_neu/Restic/Home/ check --read-data
Das dann schön mit einem Cronjob laufen lassen und die Datensicherung ist erledigt 
