blob: 8b7d9c3c77dfbbbfd9837f77d9edb77617da4d74 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
#!/bin/bash
#
# This is a simple backup script using borg. 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
# - You can override variables from main() as well as the pre_backup() and post_backup() functions in
# $XDG_CONFIG_HOME/backup-sh-conf.sh or /etc/backup-sh-conf.sh
# - As root run `borg init -v --encryption=keyfile backup:borg-$(hostname)`
# - If you want, increase the max_segment_size in
# ssh://backup/borg-$HOSTNAME/config from the default 5MiB
#
# Copyright ©2014-2017 Florian Pritz <bluewind@xinu.at>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# See gpl-3.0.txt for full license text.
set -e
main() {
if [[ $UID != 0 ]]; then
exec sudo "$0" "$@"
fi
TMPDIR="$(mktemp -d "/tmp/${0##*/}.XXXXXX")"
trap "rm -rf '${TMPDIR}'" EXIT TERM
# The backup repository used by borg
borg_repo="backup:borg-$HOSTNAME"
# These mountpoints will be excluded. Mountpoints not listed in either this
# or the includeMountpoints variable below will throw an error
excludeMountpoints=(
/tmp
/sys
/dev
/proc
/run
/media
)
# These mountpoints will be included
includeMountpoints=(
/
/boot
/home
/mnt/data
)
# List of patterns that should be excluded. This supports shell globbing as
# well as regex pattern. Refer to man borg for details.
IFS='' read -r -d '' excludeList <<-EOF || true
sh:/home/*/.cache/*
sh:/root/.cache/*
sh:/var/cache/pacman/pkg/*
EOF
for configfile in "${XDG_CONFIG_HOME:-$HOME/.config}/backup-sh-conf.sh" /etc/backup-sh-conf.sh; do
if [[ -e "$configfile" ]]; then
source "$configfile"
fi
done
exclude_mountpoints
echo "$excludeList" > "$TMPDIR/exclude-list-borg"
run_if_exists pre_backup
backup_borg / "$borg_repo"
run_if_exists post_backup
}
# This is called before creating the backup
pre_backup() {
# save some data that's useful for restores
local backupDataDir=/root/backup-data/
mkdir -p "$backupDataDir"
fdisk -l > "$backupDataDir/fdisk"
vgdisplay > "$backupDataDir/vgdisplay"
pvdisplay > "$backupDataDir/pvdisplay"
lvdisplay > "$backupDataDir/lvdisplay"
df -a > "$backupDataDir/df"
findmnt -l > "$backupDataDir/findmnt"
# If you wish to use snapshots, create them here
return
}
# This is called after backup creation
post_backup() {
# If you need to perform any cleanup do so here
return
}
backup_borg() {
local src=$1
local dst=$2
local -a options=(
--verbose
--numeric-owner
--compression lz4
--exclude-from "$TMPDIR/exclude-list-borg"
)
if tty -s; then
options+=(--progress --stats)
fi
borg create "${options[@]}" "$dst::backup-$(date "+%Y%m%d-%H%M%S")" "$src"
borg prune --keep-within 7d --keep-daily 7 --keep-weekly 12 --keep-monthly 12 --keep-yearly 3 -v "$dst"
}
### support functions below ###
run_if_exists() {
if declare -F $1 &> /dev/null; then
$1 "${@:2}"
fi
}
##
# 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 "${excludeMountpoints[@]}"; do
excludeList+="sh:$fs/*"$'\n'
done
while read line; do
local mountpoint=$(echo "$line" | cut -d\ -f2 | sed 's#\040# #g;')
if ! in_array "$mountpoint" "${includeMountpoints[@]}"; then
if ! in_array_startswith "$mountpoint/" "${excludeMountpoints[@]/%//}"; then
error=1
echo "Warning: mountpoint not excluded or included: $mountpoint" >&2
fi
fi
done </etc/mtab
if ((error)); then
exit 1
fi
}
main "$@"
|
