david/scripts
david/scripts
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Started rewrite of btrfs-snapshots.sh

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david 2023-10-28 20:10:53 +02:00
parent 704340d796
commit d268b96a4c
2 changed files with 97 additions and 18 deletions
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9
README.md
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@ -18,15 +18,16 @@ More:
> This script is my very simple take on how to perform restic backups.
First you need to download the script from this Git repository. I usually just put it in root's home.
### Install
```bash
# Download
sudo curl -o /root/restic_backup.sh https://git.socialnerds.org/david/scripts/raw/branch/main/restic_backup.sh
sudo chmod +x /root/restic_backup.sh
sudo su; cd
git clone https://git.socialnerds.org/david/scripts.git
ln -s /root/scripts/restic-backup.sh /usr/local/bin/restic-backup
```
In the config section at the top of the script you can change various options to your liking.
```bash
# **** CONFIG ****

106
btrfs-snapshots.sh
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@ -1,28 +1,102 @@
#!/bin/bash
#!/usr/bin/env bash
# this will take read-only btrfs snapshots and make it available in /srv/snapshots
# Information
## ## ## ## ## ## ## ## ## ## ## ## ## ##
## ##
## btrfs-snapshots.sh ##
## ##
## Take read-only snapshots of BTRFS ##
## subvolumes ##
## ##
## ## ## ## ## ## ## ## ## ## ## ## ## ##
##
## Information
## (don't touch unless you are me)
##
NAME="btrfs-snapshots.sh"
VERSION="0.2.0"
AUTHOR="david@socialnerds.org"
LICENSE="MIT"
DESCRIPTION="$NAME (v$VERSION) takes snapshots of BTRFS volumes. It is written by $AUTHOR and published unter the $LICENSE license."
DESCRIPTION="Take read-only snapshots of BTRFS subvolumes."
WEBSITE="https://git.socialnerds.org/david/scripts"
CHANGELOG=("[2023-10-26][v0.2.0] Complete rewrite"
"[2021-01-01][v0.1.0] Initial version")
##
## Configuration
##
EXECUTABLE="$(basename $0)"
LIBRARIES="lib.sh"
DEPENDENCIES="basename dirname readlink ln mkdir rm ls date btrfs"
REQUIRE_ROOT=1
# variables
SUBVOLUMES="/"
DESTINATION_ROOT=/srv/snapshots
TIMESTAMP=$(date +%Y%m%d%H%M) #add %S if you want sub-minute snapshots
PREFIX="snapshot-"
NAME="$PREFIX$TIMESTAMP"
MAX_SNAPSHOTS=28 #how many snapshots should be kept?
# preflight checks
if [ $(whoami) != "root" ]; then
echo "error: you need to be root"
PREFIX="snapshot-"
TIMESTAMP=$(date +%Y%m%d%H%M) #add %S if you want sub-minute snapshots
NAME="$PREFIX$TIMESTAMP"
# How many snapshots should be kept?
MAX_SNAPSHOTS=32
##
## Functions
##
# Print help information
function print_help() {
printf "%s\n\n%s\n%b\n\n%s\n %-15s %s\n %-15s %s\n %-15s %s\n %-15s %s\n" \
"$DESCRIPTION" "Usage:" "$LIB_BOLD$EXECUTABLE <options> <subvolume>$LIB_CLEAR" "Options:" \
"-h, --help" "Print help screen and exit" \
"-i, --info" "Print script information and exit" \
"-v, --verbose" "More verbose output" \
"-q, --quiet" "No output except errors (overrides -v)"
}
##
## Preflight
##
# Load BASH libraries
SCRIPT_PATH=$(readlink -f "$0")
SCRIPT_DIR=$(dirname "$SCRIPT_PATH")
for LIBRARY in $LIBRARIES; do
if [[ -r "$SCRIPT_DIR/$LIBRARY" ]]; then
#echo "Loading library file [$SCRIPT_DIR/$LIBRARY]"
source "$SCRIPT_DIR/$LIBRARY"
else
echo "Error: Cannot load library file [$SCRIPT_DIR/$LIBRARY]"
exit 1
fi
done
# Check for root privileges
if ! lib_amiroot && [[ $REQUIRE_ROOT -eq 1 ]]; then
lib_print "!You need to have root privileges"
exit 1
fi
# Check for dependencies
MISSING_COMMANDS=$(lib_missing_commands $DEPENDENCIES)
if [[ -n "$MISSING_COMMANDS" ]]; then
lib_print "!One or more commands missing [$MISSING_COMMANDS]"
lib_print "Try installing them with your package manager"
exit 1
fi
##
## Liftoff
##
exit 0
# take the snapshots
for SUBVOLUME in $SUBVOLUMES; do
if [ -z ${SUBVOLUME#/} ]; then
@ -46,7 +120,7 @@ for SUBVOLUME in $SUBVOLUMES; do
fi
done
# prune old snapshots
# Delete old snapshots
SNAPSHOTS=$(ls -r $SNAPSHOT_PATH | grep $PREFIX)
i=0
for SNAPSHOT in $SNAPSHOTS; do
@ -57,5 +131,9 @@ for SNAPSHOT in $SNAPSHOTS; do
i=$((i+1))
done
# end script successfully
##
## Here be dragons
##
exit 0