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|
#!/bin/bash
#
# This is a simple backup script using duplicity. It's supposed to serve as a
# starting point and to be adjusted to your system.
#
# Important steps:
# - define a host "backup" in root's .ssh/config
# - read the script and adjust to your needs
set -e
main() {
if [[ $UID != 0 ]]; then
exec sudo "$0" "$@"
fi
TMPDIR="$(mktemp -d "/tmp/${0##*/}.XXXXXX")"
trap "rm -rf '${TMPDIR}'" EXIT TERM
# ensure duplicity keeps its cache at a central location
export HOME=/root
# if you want to encrypt the backups remove --no-encryption in the duplicity call
# and uncomment the lines that contain PASSPHRASE
#PASSPHRASE="randomstringhere"
# these mountpoints will be excluded
excludeMountpoints=(
/tmp/
/sys/
/dev/
/proc/
/run/
/mnt/levant/nfs/
/media/
)
# mountpoints of these types do not need to be excluded
fsWhitelist=(ext4 btrfs)
# first line that matches wins
IFS='' read -r -d '' excludeList <<EOF || true
+ /home/flo/.local/share/Steam/steamapps/common/Counter-Strike Global Offensive/csgo/cfg
- /home/*/.local/share/Steam/steamapps/common/*/*
- /home/*/.cache/*
- /home/*/.claws-mail/imapcache
- /root/.cache/*
- /var/cache/pacman/pkg/*
EOF
exclude_mountpoints
echo "$excludeList" > "$TMPDIR/exclude-list"
# save some data that's useful for restores
local backupDataDir=/root/backup-data/
mkdir -p "$backupDataDir"
fdisk -l > "$backupDataDir/fdisk"
vgdisplay > "$backupDataDir/vgdisplay"
pvdisplay > "$backupDataDir/pvdisplay"
lvdisplay > "$backupDataDir/lvdisplay"
lvdisplay > "$backupDataDir/lvdisplay"
df -a > "$backupDataDir/df"
findmnt -l > "$backupDataDir/findmnt"
# this does not ignore /proc and network mounts so it's not that useful :(
#find / | gzip > /root/full-file-list.txt.gz
local backupdir="$HOSTNAME-backup/full-backup"
backup / "sftp://backup/$backupdir/" --exclude-filelist "$TMPDIR/exclude-list"
ssh backup "touch $backupdir/last-backup-timestamp"
}
backup() {
local src=$1
local dest=$2
shift 2
local -a options=()
if [[ $(date +%u ) == '1' ]]; then
# try to only run full backups on monday (1)
options+=(--full-if-older-than 2D)
else
# force a full backup once in a while
options+=(--full-if-older-than 20D)
fi
#export PASSPHRASE
duplicity \
-v5 \
--numeric-owner \
--volsize 250 \
--allow-source-mismatch \
--asynchronous-upload \
--no-encryption \
"${options[@]}" "$@" "$src" "$dest"
duplicity --force remove-older-than 120D "$dest"
#export PASSPHRASE=""
}
### support functions below ###
##
# usage : in_array( $needle, $haystack )
# return : 0 - found
# 1 - not found
##
in_array() {
local needle=$1; shift
local item
for item in "$@"; do
[[ $item = "$needle" ]] && return 0 # Found
done
return 1 # Not Found
}
# same as in_array except 0 is returned if any item in haystack starts with needle
in_array_startswith() {
local needle=$1; shift
local item
for item in "$@"; do
[[ "$needle" == "$item"* ]] && return 0 # Found
done
return 1 # Not Found
}
exclude_mountpoints() {
local error=0
for fs in "${excludeMountpoints[@]}"; do
if [[ $fs != */ ]]; then
error=1
echo "Error: excludeMountpoints entry doesn't end with /: $fs" >&2
fi
excludeList+="- $fs*"$'\n'
done
while read line; do
local mountpoint=$(echo "$line" | cut -d\ -f2 | sed 's#\040# #g;')
local type=$(echo "$line" | cut -d\ -f3)
if ! in_array $type "${fsWhitelist[@]}"; then
if ! in_array_startswith "$mountpoint/" "${excludeMountpoints[@]}"; then
error=1
echo "Warning: mountpoint not excluded: $mountpoint" >&2
fi
fi
done </etc/mtab
if ((error)); then
exit 1
fi
}
main "$@"
|
