recepies/ganeti/restore-to-zfs-vol.sh

#!/bin/sh -e 

pool=workshop

size=60G
vol_opt="-b 4k -s"
#vol_opt="-b 4k -s -o compression=lz4"

if [ -z "$1" ] ; then
        zfs list -r $pool/block
        echo
        test ! -z "/mnt/*" && df -h /mnt/* | grep -v aufs
        echo
        du -hcs /$pool/ganeti/export/* | cut -d/ -f1,5
        exit 1
else
        instance=$1
fi

umount /mnt/$instance || true
zfs destroy $pool/block/$instance || true

zfs create -V $size $vol_opt $pool/block/$instance

test -d /mnt/$instance || mkdir /mnt/$instance

wait_for() {
        echo -n "waiting for $1 " 
        while [ ! -e $1 ] ; do
                echo -n .
                sleep 1
        done
        echo " found"
}

wait_for /dev/zvol/$pool/block/$instance

label=`echo $instance | cut -d. -f1`
echo "label $label = $instance"

time mkfs.ext4 -m 0 -L $label /dev/zvol/$pool/block/$instance 

wait_for /dev/disk/by-label/$label

mount /dev/disk/by-label/$label /mnt/$instance/
cd /mnt/$instance/
dump=`ls /$pool/ganeti/export/$instance/*.disk0*.snap`
ls -alh $dump
zpool iostat 2 | tee /dev/shm/$instance &
pid_iostat=$!
( while true; do zfs list $pool/block/$instance ; sleep 10 ; done ) &
pid_list=$! 
time restore rf $dump
kill $pid_iostat
kill $pid_list

wc -l /dev/shm/$instance
df -h /mnt/$instance
1	dpavlin	320	#!/bin/sh -e
2
3			pool=workshop
4
5			size=60G
6	dpavlin	321	vol_opt="-b 4k -s"
7			#vol_opt="-b 4k -s -o compression=lz4"
8	dpavlin	320
9			if [ -z "$1" ] ; then
10			zfs list -r $pool/block
11			echo
12	dpavlin	321	test ! -z "/mnt/" && df -h /mnt/ \| grep -v aufs
13	dpavlin	320	echo
14			du -hcs /$pool/ganeti/export/* \| cut -d/ -f1,5
15			exit 1
16			else
17			instance=$1
18			fi
19
20			umount /mnt/$instance \|\| true
21			zfs destroy $pool/block/$instance \|\| true
22
23	dpavlin	321	zfs create -V $size $vol_opt $pool/block/$instance
24	dpavlin	320
25			test -d /mnt/$instance \|\| mkdir /mnt/$instance
26
27			wait_for() {
28			echo -n "waiting for $1 "
29			while [ ! -e $1 ] ; do
30			echo -n .
31			sleep 1
32			done
33			echo " found"
34			}
35
36			wait_for /dev/zvol/$pool/block/$instance
37
38			label=`echo $instance \| cut -d. -f1`
39			echo "label $label = $instance"
40
41			time mkfs.ext4 -m 0 -L $label /dev/zvol/$pool/block/$instance
42
43			wait_for /dev/disk/by-label/$label
44
45			mount /dev/disk/by-label/$label /mnt/$instance/
46			cd /mnt/$instance/
47			dump=`ls /$pool/ganeti/export/$instance/.disk0.snap`
48			ls -alh $dump
49			zpool iostat 2 \| tee /dev/shm/$instance &
50			pid_iostat=$!
51			( while true; do zfs list $pool/block/$instance ; sleep 10 ; done ) &
52			pid_list=$!
53			time restore rf $dump
54			kill $pid_iostat
55			kill $pid_list
56
57			wc -l /dev/shm/$instance
58			df -h /mnt/$instance