rzerres/dsnap-sync
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inital readme

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James Barnett
2016-10-01 07:46:12 -05:00
parent 371797ee9e
commit 53e666b364
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README.md Normal file
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# snap-sync
## About
This bash script sends incremental snapshots to another drive for backing up
data. Plug in and mountany btrfs-formatted device you want your system to be
backed up to (like a USB drive). When you run the script you will be prompted
to select a mounted btrfs device.
The script iterates through all snapper configurations. For each configuration
it creates a new local snapshot. If you have never synced to the specified
device you will be prompted to enter a directory on the device where the backup
snapshots will go. Additionally you are show the location of the backed up
snapshot. If you have performed a backup to this device before, only the changes
since the last backup have to be sent.
snapper is required.
## Example output
Selected a mounted BTRFS device to backup to.
1) 43cedfb6-8775-43be-8abc-ee63bb92e10e (/)
2) 43cedfb6-8775-43be-8abc-ee63bb92e10e (/.snapshots)
3) 43cedfb6-8775-43be-8abc-ee63bb92e10e (/home)
4) 7360922b-c916-4d9f-a670-67fe0b91143c (/run/media/wes/backup)
0) Exit
Enter a number: 4
You selected the disk with UUID 7360922b-c916-4d9f-a670-67fe0b91143c.
At 'home' configuration
Backup location: /run/media/wes/backup/acer-c720/home/1097/
Continue (y/n)? y
At subvol /home/.snapshots/1097/snapshot
At 'root' configuration
Backup location: /run/media/wes/backup/acer-c720/root/2288/
Continue (y/n)? y
At subvol //.snapshots/2288/snapshot
Done!

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backup
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# snapshot created on your system since that will be used to determine the # snapshot created on your system since that will be used to determine the
# difference for the next incremental snapshot. # difference for the next incremental snapshot.
# Can set the backup directory here, or in the snapper configuration file with
# EXT_BACKUP_LOCATION
declare -r description="latest incremental backup"
# You can set a snapper configuration to be excluded by setting EXT_BACKUP="no"
# in its snapper configuration file.
#--------------------------------------------------------
# Don't modify anything below here
set -e set -e
declare -r description="latest incremental backup"
if [[ $EUID -ne 0 ]]; then if [[ $EUID -ne 0 ]]; then
printf "Script must be run as root.\n" printf "Script must be run as root.\n"
exit exit
@@ -108,7 +100,7 @@ for x in $SNAPPER_CONFIGS; do
if [[ -z "$old_number" ]]; then if [[ -z "$old_number" ]]; then
btrfs send "$new_snapshot" | btrfs receive "$backup_location" btrfs send "$new_snapshot" | btrfs receive "$backup_location" &>/dev/null
else else
@@ -128,6 +120,4 @@ for x in $SNAPPER_CONFIGS; do
done done
date > "$HOME"/.lastbackup
printf "Done!\n" printf "Done!\n"