[pve-devel] [PATCH 7/8] add clone_disks

[Alexandre Derumier]

qm create --clonefrom vmid --snapname snap

Signed-off-by: Alexandre Derumier <aderumier at odiso.com>
---
 PVE/API2/Qemu.pm |   89 ++++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 86 insertions(+), 3 deletions(-)

diff --git a/PVE/API2/Qemu.pm b/PVE/API2/Qemu.pm
index d2dba3c..548987f 100644
--- a/PVE/API2/Qemu.pm
+++ b/PVE/API2/Qemu.pm
@@ -78,6 +78,7 @@ my $create_disks = sub {
 	    die "no storage ID specified (and no default storage)\n" if !$storeid;
 	    my $defformat = PVE::Storage::storage_default_format($storecfg, $storeid);
 	    my $fmt = $disk->{format} || $defformat;
+
 	    my $volid = PVE::Storage::vdisk_alloc($storecfg, $storeid, $vmid,
 						  $fmt, undef, $size*1024*1024);
 	    $disk->{file} = $volid;
@@ -132,6 +133,48 @@ my $create_disks = sub {
     return $vollist;
 };
 
+my $clone_disks = sub {
+    my ($rpcenv, $authuser, $conf, $storecfg, $vmid, $pool, $settings, $snap) = @_;
+
+    my $vollist = [];
+
+    my $res = {};
+    PVE::QemuServer::foreach_drive($settings, sub {
+	my ($ds, $disk) = @_;
+
+	my $volid = $disk->{file};
+	if (!$volid || $volid eq 'none' || $volid eq 'cdrom') {
+	    $res->{$ds} = $settings->{$ds};
+	} else{
+	    my $voliddst = PVE::Storage::volume_clone($storecfg, $volid, $snap, $vmid);
+
+	    $disk->{file} = $voliddst;
+	    $disk->{size} = PVE::Storage::volume_size_info($storecfg, $voliddst, 1);
+
+	    push @$vollist, $voliddst;
+	    delete $disk->{format}; # no longer needed
+	    $res->{$ds} = PVE::QemuServer::print_drive($vmid, $disk);
+	}
+    });
+
+    # free allocated images on error
+    if (my $err = $@) {
+	syslog('err', "VM $vmid creating disks failed");
+	foreach my $volid (@$vollist) {
+	    eval { PVE::Storage::vdisk_free($storecfg, $volid); };
+	    warn $@ if $@;
+	}
+	die $err;
+    }
+
+    # modify vm config if everything went well
+    foreach my $ds (keys %$res) {
+	$conf->{$ds} = $res->{$ds};
+    }
+
+    return $vollist;
+};
+
 my $check_vm_modify_config_perm = sub {
     my ($rpcenv, $authuser, $vmid, $pool, $key_list) = @_;
 
@@ -256,6 +299,15 @@ __PACKAGE__->register_method({
 		    type => 'string', format => 'pve-poolid',
 		    description => "Add the VM to the specified pool.",
 		},
+                clonefrom => get_standard_option('pve-vmid', {
+                    description => "Template Vmid.",
+                    optional => 1,
+                }),
+                snapname => get_standard_option('pve-snapshot-name', {
+                    description => "Template Snapshot Name.",
+                    optional => 1,
+                }),
+
 	    }),
     },
     returns => {
@@ -282,6 +334,10 @@ __PACKAGE__->register_method({
 	
 	my $pool = extract_param($param, 'pool');
 
+	my $clonefrom = extract_param($param, 'clonefrom');
+
+	my $snapname = extract_param($param, 'snapname');
+
 	my $filename = PVE::QemuServer::config_file($vmid);
 
 	my $storecfg = PVE::Storage::config();
@@ -375,12 +431,39 @@ __PACKAGE__->register_method({
 
 		my $vollist = [];
 
-		my $conf = $param;
+		if($clonefrom){
 
-		eval {
+		    my $parentconf = PVE::QemuServer::load_config($clonefrom);
+
+		    if($snapname){
+			die "You can't clone. vmid $clonefrom snap $snapname is not a template" if !defined($parentconf->{snapshots}->{$snapname}->{template});
+			$param = $parentconf->{snapshots}->{$snapname};
+			delete $param->{snaptime};
+
+		    }else{
+			die "You can't clone. vmid $clonefrom is not a template" if !defined($parentconf->{template});
+		    	$param = $parentconf;
+		        delete $param->{parent};
+		        delete $param->{snapshots};
+		    }
 
-		    $vollist = &$create_disks($rpcenv, $authuser, $conf, $storecfg, $vmid, $pool, $param, $storage);
+		    foreach my $opt (keys %$param) {
+			if ($opt =~ m/^net(\d+)$/) {
+			    # add macaddr
+			    my $net = PVE::QemuServer::parse_net($param->{$opt});
+			    $net->{macaddr} =  PVE::Tools::random_ether_addr();
+			    $param->{$opt} = PVE::QemuServer::print_net($net);
+			}
+		    }
+		}
 
+		my $conf = $param;
+		eval {
+		    if($clonefrom){
+			$vollist = &$clone_disks($rpcenv, $authuser, $conf, $storecfg, $vmid, $pool, $param, $snapname);
+		    }else{
+			$vollist = &$create_disks($rpcenv, $authuser, $conf, $storecfg, $vmid, $pool, $param, $storage);
+		    }
 		    # try to be smart about bootdisk
 		    my @disks = PVE::QemuServer::disknames();
 		    my $firstdisk;
-- 
1.7.10.4