-
Notifications
You must be signed in to change notification settings - Fork 4
/
backup.sh
144 lines (128 loc) · 4.7 KB
/
backup.sh
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
#!/bin/bash
set -e #当命令以非零状态退出时，则退出shell
Color_End="\033[0m"
Color_Red="\033[31m"
Color_Green="\033[32m"
if [ `id -un` != "root" ];then
echo -e "$Color_Red权限不足，退出脚本！ $Color_End"
exit 1
fi
#安装必要的软件安装包
echo -e "$Color_Green安装必要的软件...$Color_End"
apt-get install -qq -y dosfstools dump parted kpartx rsync
apt-get clean
# 设置文件存放目录
BACKUP_DIR=`pwd`
BACK_UP_DIR=$BACKUP_DIR/raspi-backup
FILE=$BACK_UP_DIR/raspi-backup.img #备份后的img文件名
mkdir $BACK_UP_DIR
#创建镜像img文件
echo -e "$Color_Green创建img文件...$Color_End"
ROOT=`df -P | grep /dev/root | awk '{print $3}'` #获取 ROOT的文件大小
MMCBLK0P1=`df -P | grep /dev/mmcblk0p1 | awk '{print $2}'` #获取主目录的文件大小
ALL=`echo $ROOT $MMCBLK0P1 | awk '{print int(($1+$2)*1.2)}'` #生成一个比原文件大1.2倍的IMG文件
echo "预计生成文件大小：$(($ALL/1024))MB"
echo "root 大小是 $(($ROOT/1024))MB"
echo "boot 大小是 $(($MMCBLK0P1/1024))MB"
echo "文件路径是 $FILE"
dd if=/dev/zero of=$FILE bs=1K count=$ALL status=progress
#格式化分区
echo -e "$Color_Green格式化root和boot...$Color_End"
P1_START=`fdisk -l /dev/mmcblk0 | grep /dev/mmcblk0p1 | awk '{print $2}'`
P1_END=`fdisk -l /dev/mmcblk0 | grep /dev/mmcblk0p1 | awk '{print $3}'`
P2_START=`fdisk -l /dev/mmcblk0 | grep /dev/mmcblk0p2 | awk '{print $2}'`
echo "boot扇区: $P1_START - $P1_END "
echo "root扇区: :$P2_START - end"
parted $FILE --script -- mklabel msdos
parted $FILE --script -- mkpart primary fat32 ${P1_START}s ${P1_END}s
parted $FILE --script -- mkpart primary ext4 ${P2_START}s -1
parted $FILE --script -- quit
# mount
echo -e "$Color_Green挂载分区...$Color_End"
loopdevice_dst=`losetup -f --show $FILE`
echo "loop分区在 $loopdevice_dst"
PART_BOOT="/dev/dm-0"
PART_ROOT="/dev/dm-1"
sleep 1
device_dst=`kpartx -va $loopdevice_dst | sed -E 's/.*(loop[0-9])p.*/\1/g' | head -1`
sleep 1
device_dst="/dev/mapper/${device_dst}"
sleep 1
mkfs.vfat ${device_dst}p1 -n boot
sleep 1
mkfs.ext4 ${device_dst}p2 -L rootfs
sleep 1
# 复制文件到img
echo -e "$Color_Green复制文件到img...$Color_End"
echo "备份分区 /dev/boot"
dst_boot_path=$BACK_UP_DIR/dst_boot
mkdir $dst_boot_path
mount -t vfat ${device_dst}p1 $dst_boot_path
cp -rfp /boot/* $dst_boot_path
echo "备份boot完成"
echo "备份分区 /dev/root"
dst_root_path=$BACK_UP_DIR/dst_root
mkdir $dst_root_path
sleep 1
mount -t ext4 ${device_dst}p2 $dst_root_path
cd $dst_root_path
chmod 777 $dst_root_path/
#通过rsync复制根目录文件到IMG镜像中，排除了一些不需要同步的文件
rsync -ax \
--info=progress2 \
--no-inc-recursive \
--exclude="$FILE" \
--exclude=$BACK_UP_DIR \
--exclude=$BACKUP_DIR/$0 \
--exclude=/sys/* \
--exclude=/proc/* \
--exclude=/tmp/* / $dst_root_path/
echo "备份root完成"
# 设置自动扩展空间
echo -e "$Color_Green设置自动扩展空间 ...$Color_End"
sed -i 's/exit 0/sudo bash \/expand-rootfs.sh \&/' $dst_root_path/etc/rc.local
echo "exit 0" >> $dst_root_path/etc/rc.local
cat > $dst_root_path/expand-rootfs.sh << EOF
#!/bin/bash
sed -i '/sudo bash \/expand-rootfs.sh &/d' /etc/rc.local
rm "\`pwd\`/\$0"
echo -e "\033[33m两秒后扩展分区空间！\033[0m"
sleep 2
raspi-config --expand-rootfs
echo -e "\033[33my一秒后重启系统！\033[0m"
sleep 1
reboot
EOF
#返回目录 $BACKUP_DIR
cd $BACKUP_DIR
sync
#替换PARTUUID 这步非常重要，liunx启动时会对PARTUUID有特定的指定，备份的时候是把旧的也同步过来，需要根据新的IMG文件来更新PARTUUID
echo -e "$Color_Green替换PARTUUID ...$Color_End"
opartuuidb=`blkid -o export /dev/mmcblk0p1 | grep PARTUUID`
opartuuidr=`blkid -o export /dev/mmcblk0p2| grep PARTUUID`
npartuuidb=`blkid -o export ${device_dst}p1 | grep PARTUUID`
npartuuidr=`blkid -o export ${device_dst}p2 | grep PARTUUID`
echo "BOOT uuid $opartuuidb 替换为 $npartuuidb"
echo "ROOT uuid $opartuuidr 替换为 $npartuuidr"
sed -i "s/$opartuuidr/$npartuuidr/g" $dst_boot_path/cmdline.txt
sed -i "s/$opartuuidb/$npartuuidb/g" $dst_root_path/etc/fstab
sed -i "s/$opartuuidr/$npartuuidr/g" $dst_root_path/etc/fstab
#清理释放装载的文件夹
echo -e "$Color_Green清理释放装载的文件夹...$Color_End"
echo "dst_boot_path: $dst_boot_path"
echo "dst_root_path : $dst_root_path"
echo "device_dst: ${device_dst}"
echo "loopdevice_dst: $loopdevice_dst "
umount $dst_boot_path
umount $dst_root_path
kpartx -d ${device_dst}p1
kpartx -d ${device_dst}p2
kpartx -d $loopdevice_dst
losetup -d $loopdevice_dst
rm -rf $dst_boot_path
rm -rf $dst_root_path
chmod 766 $FILE
mv $FILE $BACKUP_DIR
rm -rf $BACK_UP_DIR
echo -e "$Color_Green备份完成。$Color_End"
exit 0