config_en.md

Create Configfiles

The following assumes that everything has been installed and that the backup drive has been prepared.

Configure backsnap

Backsnap needs to know which snapshots to back up and where to store the backups. This is set in the configuration files at /etc/backsnap.d/

When you started sudo backsnap -gi, Backsnap first created /etc/backsnap.d/ and then prepared a simple configuration file for this PC.

/etc/backsnap.d/local.conf

1) Select the PC

# backup local pc per sudo
pc = localhost
# backup local pc per ssh
#pc = root@localhost

One of:

• pc = localhost = This PC (Backsnap uses sudo to invoke btrfs)
• User@IP or User@Name = The pc is accessible via SSH (Backsnap uses ssh to call btrfs there)

2) Select the UUID for the backup volume

# detect and mount backupvolume by scanning for this id (as part of the uuid)
backup_id = 03417033-3645-4ae7-9451-efafcbb9124e

Only one configuration is allowed to specify the UUID of the partition where backups should be stored. The subvolume @BackSnap of the backup partition with this UUID is mounted in /tmp/BackupRoot during the backup. The compression zstd is set to level 9. Using a UUID reliably prevents anything from being mounted incorrectly.

3) Select options and a name for the first subvolume

# use these flags for the following backups (optional)
#flags = -gtc -v=1 -a=12  
# backuplabel = manjaro17 for snapshots of /
manjaro17 = /

All snapshots of the subvolume mounted at / will be included in the backup at /tmp/BackupRoot/**manjaro17**/

4) Select options and a name for the next subvolume

#flags = -gtc -v=1 -a=12 
# backuplabel = manjaro17.home for snapshots of /home
manjaro17.home = /home

All snapshots of the subvolume mounted at /home will be included in the backup at /tmp/BackupRoot/**manjaro17.home**/

5) And so forth ...

You can add additional subvolumes here. Each with its own mount point and its own name.

/etc/backsnap.d/laptop.conf

For each additional PC that is to be included in the backup, you must create its own configuration file.

# This pc is reachable via ssh with root@notebook
pc = root@notebook
# flags are unchanged ;-)
# Backup snapshots of / to label notebook
notebook = /
# Backup snapshots of /home to label notebook.home
notebook.home = /home

Backsnap will try to reach the PC via ssh. If that fails, this pc will be skipped.

Here we go

You can do a test run

In a terminal:

sudo backsnap -gcd -v=6 -a=20

• -g with gui
• -c compressed btrfs send format
• -d dry run
• -v=6 verbose
• -a=20 automatically continue with the next subvolume after 20 seconds

You can make a proper backup

In a terminal:

sudo backsnap -gc -v=6 -a=10

• -g with gui
• -c compressed btrfs send format
• -v=6 be verbose
• -a=10 automatically continue with the next subvolume after 10 seconds

Please keep in mind that a backup can take a really long time depending on the number of snapshots. Additionally it depends on the speed of your backup drive.

Done

As long as the config files exist in /etc/backsnap, one command is enough to create a backup to the external drive.

sudo backsnap -gc 

or

sudo backsnap

The available (and configured) options are displayed with

sudo backsnap -h

BackSnap Version 0.6.8.27 (2024/06/22)
args >  -h 
java [version=23-ea, major=23, minor=null, patch=null]
using ThreadPerTaskExecutor
Pc[sudo ] & Id:03417033-3745-4ae7-9451-efafcbb9124e
OneBackup[/etc/backsnap.d/gast.conf, Pc[root@gast]:/ (gast) flags=-c -a=5 -v=5 -o=500 -m=200]
OneBackup[/etc/backsnap.d/gast.conf, Pc[root@gast]:/home (gast.home) flags=-c -a=5 -v=5 -o=500 -m=200]
OneBackup[/etc/backsnap.d/jitsim1.conf, Pc[root@jitsim1]:/ (jitsim1) flags=-c -a=5 -v=5 -o=3500 -m=1000]
OneBackup[/etc/backsnap.d/jitsim1.conf, Pc[root@jitsim1]:/home (jitsim1.home) flags=-c -a=5 -v=5 -o=3500 -m=1000]
OneBackup[/etc/backsnap.d/jitsim1.conf, Pc[root@jitsim1]:/opt/hst (jitsim1.hst) flags=-c -a=5 -v=5 -o=3500 -m=1000]
OneBackup[/etc/backsnap.d/jitsim1.conf, Pc[root@jitsim1]:/opt/hugo (jitsim1.hugo) flags=-c -a=5 -v=5 -o=3500 -m=1000]
OneBackup[/etc/backsnap.d/local.conf, Pc[sudo ]:/ (manjaro19) flags=-c -v=5 -a=5 -o=4000 -m=1000]
OneBackup[/etc/backsnap.d/local.conf, Pc[sudo ]:/home (manjaro19.home) flags=-c -v=5 -a=5 -o=4000 -m=1000]
OneBackup[/etc/backsnap.d/laptop.conf, Pc[root@notebook]:/ (notebook) flags=null]
OneBackup[/etc/backsnap.d/laptop.conf, Pc[root@notebook]:/home (notebook.home) flags=null]
OneBackup[/etc/backsnap.d/0_server.conf, Pc[root@server]:/ (server) flags=-c -v=5 -a=5 -o=3000 -m=1000]
OneBackup[/etc/backsnap.d/0_server.conf, Pc[root@server]:/home (server.home) flags=-c -v=5 -a=5 -o=3000 -m=1000]
OneBackup[/etc/backsnap.d/0_server.conf, Pc[root@server]:/srv (server.srv) flags=-c -v=5 -a=5 -o=3000 -m=1000]
OneBackup[/etc/backsnap.d/timeshift.conf, Pc[root@timeshift]:/ (timeshift) flags=-c -v=5 -a=5 -o=3000 -m=1000]
OneBackup[/etc/backsnap.d/timeshift.conf, Pc[root@timeshift]:/home (timeshift.home) flags=-c -v=5 -a=5 -o=3000 -m=1000]
2 ==>
BackSnap is made for making backups of btrfs snapshots on linux

Usage:
------
/usr/local/bin/backsnap [OPTIONS]

 -h --help           show usage
 -x --version        show date and version
 -d --dryrun         do not do anything ;-)
 -v --verbose        be more verbose (-v=9)
 -s --singlesnapshot backup exactly one snapshot
 -g --gui            enable gui (works only with sudo)
 -a --auto           auto-close gui when ready
 -c --compressed     use protokoll version2 for send/receive (if possible)
 -i --init           init /etc/backsnap.d/local.conf (only with -g)
 -o --deleteold      mark old backups for deletion in gui (-o=500)
 -m --keepminimum    mark all but minimum backups for deletion in gui (-m=250)  
 
 -o,-m,        need  manual confirmation in the gui to delete marked snapshots
 -i            needs gui to confirm uuid of backup-medium
  
 For sources see@ https://github.com/andreaskielkopf/BackSnap and inside this file
 For help go to   https://forum.manjaro.org/t/howto-hilfsprogramm-fur-backup-btrfs-snapshots-mit-send-recieve

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Sontag, 23. Juni 2024 14:46

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Sonntag, 29. Oktober 2023 17:01