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
|
#!/bin/bash
set -e
trap '' 2 # Disable Ctrl+C
cd "$(dirname "$0")"
img_cdrom="$HOME/KVM/iso/ubuntu-14.04.5-server-amd64.iso"
img_disk="./ubuntu-travis.qcow2"
img_size="10G"
[ ! -f "$img_cdrom" ] && echo "ERROR: '$img_cdrom' doesn't exist." && exit 1
par=(
-serial none
-parallel none
-enable-kvm
-name "Travis"
-cpu host,kvm=off
-smp sockets=1,cores=4,threads=1
-m 4096
-device intel-hda,id=sound0,bus=pci.0
-device hda-duplex
-rtc base=localtime
-net nic,macaddr=00:1d:cb:f0:27:3f,model=virtio,id=net0
-net bridge,id=bridge0,br=kvm0
-device ide-cd,drive=cd1,id=cdrom1,unit=0,bus=ide.0
-drive if=none,id=cd1,media=cdrom,file="$img_cdrom"
-drive if=virtio,id=disk0,format=qcow2,media=disk,file="$img_disk"
-boot once=c,menu=off # boot from hdd
-vga qxl
)
# mount -t 9p apt /mnt/apt/ -o trans=virtio,version=9p2000.L,posixacl,msize=104857600,cache=loose
[ -d "apt/trusty" ] && par+=(-virtfs local,mount_tag=apt,path="$PWD/apt/trusty",security_model=none)
img_reset() {
qemu-img create -f qcow2 -b "${img_disk%.*}-clean.qcow2" "$img_disk"
}
img_compress() {
if [ -d mnt ]; then echo "Directory 'mnt' already exists." ; exit 1; fi
sudo modprobe nbd max_part=63
sudo qemu-nbd -c /dev/nbd0 "${img_disk%.*}-clean.qcow2"
mkdir mnt
sudo mount /dev/nbd0p1 mnt/
sudo fstrim -v mnt/
sudo umount mnt/
rmdir mnt
echo -n " zeroing unused space "
sudo zerofree -v /dev/nbd0p1
sudo qemu-nbd -d /dev/nbd0
sudo modprobe -r nbd
mv "${img_disk%.*}-clean.qcow2" "${img_disk%.*}.old.qcow2"
echo "compressing ${img_disk%.*}-clean.qcow2"
qemu-img convert -O qcow2 "${img_disk%.*}.old.qcow2" "${img_disk%.*}-clean.qcow2"
rm "${img_disk%.*}.old.qcow2"
}
img_mount() {
sudo modprobe nbd max_part=63
sudo qemu-nbd -c /dev/nbd0 "$img_disk"
mkdir mnt
sudo mount /dev/nbd0p1 mnt/
echo "exit this shell to unmount image"
(cd mnt && bash -login)
sudo umount mnt/
rmdir mnt
sudo qemu-nbd -d /dev/nbd0
sudo modprobe -r nbd
}
img_merge() {
echo "creating merged image..."
qemu-img convert -O qcow2 "$img_disk" "${img_disk%.*}.new.qcow2"
mv "${img_disk%.*}.new.qcow2" "${img_disk%.*}-clean.qcow2"
img_reset
}
[ ! -f "${img_disk%.*}-clean.qcow2" ] && ( echo "creating $img_size base disk image..." ; qemu-img create -f qcow2 "${img_disk%.*}-clean.qcow2" $img_size ; img_reset )
[ "$1" == "reset" ] && img_reset
[ "$1" == "compress" ] && img_compress
[ "$1" == "mount" ] && img_mount
[ "$1" == "merge" ] && img_merge
[ "$1" == "help" ] && echo "$0 [reset|compress|mount|merge|video|help]"
[ "$1" == "video" ] && ( par+=(-monitor stdio) ; /usr/bin/qemu-system-x86_64 "${par[@]}" "${@:2}" )
[ "$1" == "" ] && (
par+=(-monitor none -nographic)
(
echo '*** virtual machine is booting in background ***'
/usr/bin/qemu-system-x86_64 "${par[@]}" "$@" &>/dev/null
echo -e '\n*** virtual machine terminated ***'
) &
)
|
