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-Implement VM rebase after clone to master

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-Put some notes about prereq resolution and vmclone in two TODO places (denoted by VMCLONE)


git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@7296 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
This commit is contained in:
jbjohnso
2010-08-28 14:42:45 +00:00
parent e51c984380
commit 6bf308338e
1 changed files with 43 additions and 2 deletions
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45
xCAT-server/lib/xcat/plugins/kvm.pm
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@@ -763,6 +763,7 @@ sub migrate {
s/=.*//;
get_storage_pool_by_url($_,$desthypconn,$targ);
}
#TODO: VMCLONE if vm.master is set, got to vmmaster.storage for that master and add it to prereq resolution here
}
my $sock = IO::Socket::INET->new(Proto=>'udp');
my $ipa=inet_aton($node);
@@ -857,6 +858,7 @@ sub makedom {
s/=.*//;
get_storage_pool_by_url($_);
}
#TODO: VMCLONE if vm.master is set, got to vmmaster.storage for that master and add it to prereq resolution here
}
$xml = $confdata->{kvmnodedata}->{$node}->[0]->{xml};
my $newxml = fixbootorder($node,$xml);
@@ -1063,6 +1065,22 @@ sub rinv {
invstorage($domain);
invnics($domain);
}
sub get_pool_for_volume {
#attempts to get pool for a volume, returns false on failure
#TODO: build and use a total map of source paths to volume names. Then we could do more than just ones that end in uuid..
my $vol = shift;
my $file = $vol->get_path();
$file =~ m!/([^/]*)/($node\..*)\z!;
my $pooluuid=$1;
my $volname=$2;
my $pool;
my $vollocation=$file;
eval {
$pool = $hypconn->get_storage_pool_by_uuid($pooluuid);
};
return $pool;
}
sub invstorage {
my $domain = shift;
my @disks = $domain->findnodes('/domain/devices/disk');
@@ -1446,6 +1464,7 @@ sub clonevm {
my $xml;
if ($dom) {
$xml = $dom->get_xml_description();
$detach=1; #can't rebase if vm is on
} else {
$xml = $confdata->{kvmnodedata}->{$node}->[0]->{xml};
}
@@ -1504,10 +1523,12 @@ sub clonevm {
foreach (keys %volclonemap) {
my $sourcevol = $volclonemap{$_}->[0];
my $targname = $volclonemap{$_}->[1];
my $format;
$targname =~ /([^\.]*)$/;
$format=$1;
my $newvol;
my %sourceinfo = %{$sourcevol->get_info()};
my $targxml = "<volume><name>$targname</name><target><format type='$1'/></target><capacity>".$sourceinfo{capacity}."</capacity></volume>";
my $targxml = "<volume><name>$targname</name><target><format type='$format'/></target><capacity>".$sourceinfo{capacity}."</capacity></volume>";
xCAT::SvrUtils::sendmsg("Cloning ".$sourcevol->get_name()." (currently is ".($sourceinfo{allocation}/1048576)." MB and has a capacity of ".($sourceinfo{capacity}/1048576)."MB)",$callback,$node);
eval {
$newvol =$poolobj->clone_volume($targxml,$sourcevol);
@@ -1515,7 +1536,27 @@ sub clonevm {
if ($newvol) {
%sourceinfo = %{$newvol->get_info()};
xCAT::SvrUtils::sendmsg("Cloning of ".$sourcevol->get_name()." complete (clone uses ".($sourceinfo{allocation}/1048576)." for a disk size of ".($sourceinfo{capacity}/1048576)."MB)",$callback,$node);
#TODO: rebase $sourcevol to have a backingStore of $newvol
unless ($detach) {
my $rebasepath = $sourcevol->get_path();
my $rebasename = $sourcevol->get_name();
my $rebasepool = get_pool_for_volume($sourcevol);
unless ($rebasepool) {
xCAT::SvrUtils::sendmsg([1,"Skipping rebase of $rebasename, unable to find correct storage pool"],$callback,$node);
next;
}
xCAT::SvrUtils::sendmsg("Rebasing $rebasename from master",$callback,$node);
$sourcevol->delete();
my $newbasexml="<volume><name>$rebasename</name><target><format type='$format'/></target><capacity>".$sourceinfo{capacity}."</capacity><backingStore><path>".$newvol->get_path()."</path><format type='$format'/></backingStore></volume>";
my $newbasevol;
eval {
$newbasevol = $rebasepool->create_volume($newbasexml);
};
if ($newbasevol) {
xCAT::SvrUtils::sendmsg("Rebased $rebasename from master",$callback,$node);
} else {
xCAT::SvrUtils::sendmsg([1,"Critical failure, rebasing process failed halfway through, source VM trashed"],$callback,$node);
}
}
} else {
xCAT::SvrUtils::sendmsg([1,"Cloning of ".$sourcevol->get_name()." failed due to ". $@],$callback,$node);
return;