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Don't try to detect backing LVM volume is snapshot is disabled

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tags/virt-backup-0.2.22-1
Daniel Berteaud 6 years ago
parent 49564a10d0
commit f641d7b636
1 changed files with 24 additions and 24 deletions
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      virt-backup

48
virt-backup
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@ -410,33 +410,33 @@ sub prepare_backup{
}
# If the disk is a file
elsif ($disk->{type} eq 'file'){
# Try to find the mount point, and the backing device
my @df = `df -PT $source`;
my ($dev, undef, undef, undef, undef, undef, $mount) = split /\s+/, $df[1];
# Ok, we now have the backing device which probably looks like /dev/mapper/vg-lv
# We cannot pass this arg to lvcreate to take a snapshot, we need to detect Volume Group
# name and Logical Volume name
my $lvm = '';
if ($opts{lvm} eq '' and $dev =~ m!^/dev/!){
my (undef, $lv, $vg) = split (/\s+/, `$opts{lvs} --noheadings -o lv_name,vg_name $dev </dev/null`);
$lvm = '/dev/'. $vg . '/' . $lv;
}
# The backing device can be detected, but can also be overwritten with --lvm=/dev/vg/lv
# This can be usefull for example when you use GlusterFS. Df will return something like
# localhost:/vmstore as the device, but this GlusterFS volume might be backed by an LVM
# volume, in which case, you can pass it as an argument to the script
elsif ($opts{lvm} ne '' && -e "$opts{lvm}"){
$lvm = $opts{lvm};
}
else{
die "Couldn't detect the backing device for $source. You should pass it as argument like --lvm=/dev/vg/lv\n\n";
}
my $mp = $lvm;
$mp =~ s!/!_!g;
$mp = "$backupdir.mount/$mp/";
my $file = $source;
# Try to snapshot this device
if ( $opts{snapshot} ){
# Try to find the mount point, and the backing device
my @df = `df -PT $source`;
my ($dev, undef, undef, undef, undef, undef, $mount) = split /\s+/, $df[1];
# Ok, we now have the backing device which probably looks like /dev/mapper/vg-lv
# We cannot pass this arg to lvcreate to take a snapshot, we need to detect Volume Group
# name and Logical Volume name
my $lvm = '';
if ($opts{lvm} eq '' and $dev =~ m!^/dev/!){
my (undef, $lv, $vg) = split (/\s+/, `$opts{lvs} --noheadings -o lv_name,vg_name $dev </dev/null`);
$lvm = '/dev/'. $vg . '/' . $lv;
}
# The backing device can be detected, but can also be overwritten with --lvm=/dev/vg/lv
# This can be usefull for example when you use GlusterFS. Df will return something like
# localhost:/vmstore as the device, but this GlusterFS volume might be backed by an LVM
# volume, in which case, you can pass it as an argument to the script
elsif ($opts{lvm} ne '' && -e "$opts{lvm}"){
$lvm = $opts{lvm};
}
else{
die "Couldn't detect the backing device for $source. You should pass it as argument like --lvm=/dev/vg/lv\n\n";
}
my $mp = $lvm;
$mp =~ s|/|_|g;
$mp = "$backupdir.mount/$mp/";
# Maybe the LVM is already snapshoted and mounted for a previous disk ?
my $is_mounted = 0;
if (open MOUNT, "<$backupdir.meta/mount"){

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