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Try to auto detect thin volumes

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tags/virt-backup-0.2.12-1
Daniel Berteaud 9 years ago
parent bddbe716a7
commit 126d8bac8b
1 changed files with 6 additions and 5 deletions
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      virt-backup

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virt-backup
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@ -48,8 +48,8 @@ $opts{backupdir} = '/var/lib/libvirt/backup';
# in the backup dir of the VM, but in some situations, you want to put it elsewhere # in the backup dir of the VM, but in some situations, you want to put it elsewhere
$opts{lockdir} = ''; $opts{lockdir} = '';
# Size of LVM snapshots (which will be used to backup VM with minimum downtime # Size of LVM snapshots (which will be used to backup VM with minimum downtime
# if the VM is backed by LVM). If size is set to 0, virt-backup will assume # if the VM is backed by LVM). If the LVM volume is thinly provisionned (thinp)
# the volume is thinly provisioned and will create a thin snapshot # this parameter will be ignored
$opts{snapsize} = '5G'; $opts{snapsize} = '5G';
# If we should also dump the VM state (dump the memory, equivalent of virsh save) # If we should also dump the VM state (dump the memory, equivalent of virsh save)
$opts{state} = 0; $opts{state} = 0;
@ -673,8 +673,7 @@ sub usage{
"dumped in the backup dir. That's why you should use a fast support for the backup dir (fast disks, RAID0 " . "dumped in the backup dir. That's why you should use a fast support for the backup dir (fast disks, RAID0 " .
"or RAID10)\n\n" . "or RAID10)\n\n" .
"\t--snapsize=<snapsize>: The amount of space to use for snapshots. Use the same format as -L option of lvcreate. " . "\t--snapsize=<snapsize>: The amount of space to use for snapshots. Use the same format as -L option of lvcreate. " .
"eg: --snapsize=15G. Default is 5G. If you specify a size of 0, virt-backup will assume the volume is thinly provisioned " . "eg: --snapsize=15G. Default is 5G. For thinly provisionned volumes, this will be ignored\n\n" .
"and will create a thin snapshot\n\n" .
"\t--compress[=[gzip|bzip2|pbzip2|lzop|xz|lzip|plzip]]: On the fly compress the disks images during the dump. If you " . "\t--compress[=[gzip|bzip2|pbzip2|lzop|xz|lzip|plzip]]: On the fly compress the disks images during the dump. If you " .
"don't specify a compression algo, gzip will be used. For the convert action, the compression uses " . "don't specify a compression algo, gzip will be used. For the convert action, the compression uses " .
"the internal qcow2 compression feature, and so, it ignores the compression format.\n\n" . "the internal qcow2 compression feature, and so, it ignores the compression format.\n\n" .
@ -832,8 +831,10 @@ sub create_snapshot{
$lock =~ s/\//\-/g; $lock =~ s/\//\-/g;
$lock = $opts{backupdir} . '/' . $lock . '.lock'; $lock = $opts{backupdir} . '/' . $lock . '.lock';
my $cmd = "$opts{lvcreate} -s -n " . $blk . $suffix; my $cmd = "$opts{lvcreate} -s -n " . $blk . $suffix;
my ($pool) = split (/\s+/, `$lvs --noheadings -o pool_lv $blk </dev/null`);
# passing snapsize = 0 means don't allocate a fixed size, which will try to create a thin snapshot # passing snapsize = 0 means don't allocate a fixed size, which will try to create a thin snapshot
if ($opts{snapsize} ne '0'){ # we can also rely on thin detection
if ($opts{snapsize} ne '0' || !defined $pool){
$cmd .= " -L $opts{snapsize}"; $cmd .= " -L $opts{snapsize}";
} }
else{ else{

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