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-check in some hints on how to do the clonevm stuff in kvm

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git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@7269 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
This commit is contained in:
jbjohnso 2010-08-26 20:46:39 +00:00
parent 2e904fa55e
commit 418c08f5a4
1 changed files with 16 additions and 1 deletions
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17
xCAT-server/lib/xcat/plugins/kvm.pm
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@ -200,7 +200,22 @@ sub get_filepath_by_url { #at the end of the day, the libvirt storage api gives
}
}
if ($create) {
if ($create =~ /^clone=/) {
if ($create =~ /^clone=(.*)$/) {
my $src = $1;
my $fmt='raw';
if ($src =~ /\.qcow2$/) {
$fmt='qcow2';
}
my $vol = $poolobj->create_volume("<volume><name>".$desiredname."</name><target><format type='$format'/></target><capacity>100</capacity><backingStore><path>$src</path><format type='$fmt'/></backingStore></volume>");
#ok, this is simply hinting, not the real deal, so to speak
# 1) sys::virt complains if capacity isn't defined. We say '100', knowing full well it will be promptly ignored down the code. This is aggravating
# and warrants recheck with the RHEL6 stack
# 2) create_volume with backingStore is how we do the clone from master (i.e. a thin clone, a la qemu-img create)
# note how backing store is full path, allowing cross-pool clones
# 3) clone_volume is the way to invoke qemu-img convert (i.e. to 'promote' and flatten a vm image to a standalone duplicate volume
# incidentally, promote to master will be relatively expensive compared to the converse operation, as expected
# will have to verify as it is investigated whether this can successfully cross pools (hope so)
# 4) qemu-img was so much more transparent and easy to figure out than this
} else {
my $vol = $poolobj->create_volume("<volume><name>".$desiredname."</name><target><format type='$format'/></target><capacity>".getUnits($create,"G",1)."</capacity><allocation>0</allocation></volume>");
if ($vol) { return $vol->get_path(); }