[pve-devel] [PATCHV3 pve-container 2/4] Add move_volume.

[Wolfgang Link]

Now it is possible to move the volume to an other storage.
This works only when the CT is off, to keep the volume consistent.
---
 src/PVE/API2/LXC.pm | 116 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/PVE/CLI/pct.pm  |   1 +
 2 files changed, 117 insertions(+)

diff --git a/src/PVE/API2/LXC.pm b/src/PVE/API2/LXC.pm
index 0bcadc3..71cf21d 100644
--- a/src/PVE/API2/LXC.pm
+++ b/src/PVE/API2/LXC.pm
@@ -1374,4 +1374,120 @@ __PACKAGE__->register_method({
 	return PVE::LXC::Config->lock_config($vmid, $code);;
     }});
 
+__PACKAGE__->register_method({
+    name => 'move_ct_volume',
+    path => '{vmid}/move_volume',
+    method => 'POST',
+    protected => 1,
+    proxyto => 'node',
+    description => "Move a rootfs-/mp-volume to a different storage",
+    permissions => {
+	description => "You need 'VM.Config.Disk' permissions on /vms/{vmid}, " .
+	    "and 'Datastore.AllocateSpace' permissions on the storage.",
+	check =>
+	[ 'and',
+	  ['perm', '/vms/{vmid}', [ 'VM.Config.Disk' ]],
+	  ['perm', '/storage/{storage}', [ 'Datastore.AllocateSpace' ]],
+	],
+    },
+    parameters => {
+	additionalProperties => 0,
+	properties => {
+	    node => get_standard_option('pve-node'),
+	    vmid => get_standard_option('pve-vmid', { completion => \&PVE::LXC::complete_ctid }),
+	    storage => get_standard_option('pve-storage-id', {
+		description => "Target Storage.",
+		default => 'local',
+		completion => \&PVE::Storage::complete_storage_enabled,
+	    }),
+	    delete => {
+		type => 'boolean',
+		description => "Delete the original volume after successful copy. By default the original disk is kept as unused disk.",
+		optional => 1,
+		default => 0,
+	    },
+	    volume => {
+		type => 'string',
+		description => "Volume which will move.\n Format: [rootfs|mp<x>]",
+
+	    },
+	    digest => {
+		type => 'string',
+		description => 'Prevent changes if current configuration file has different SHA1 digest. This can be used to prevent concurrent modifications.',
+		maxLength => 40,
+		optional => 1,
+	    }
+	},
+    },
+    returns => {
+	type => 'string',
+    },
+    code => sub {
+	my ($param) = @_;
+
+	my $rpcenv = PVE::RPCEnvironment::get();
+
+	my $authuser = $rpcenv->get_user();
+
+	my $node = extract_param($param, 'node');
+
+	my $vmid = extract_param($param, 'vmid');
+
+	my $storage = extract_param($param, 'storage');
+
+	my $volume = extract_param($param, 'volume');
+
+	my $delete = extract_param($param, 'delete');
+
+	my $digest = extract_param($param, 'digest');
+
+	my $code = sub {
+
+	    my $conf = PVE::LXC::Config->load_config($vmid);
+	    PVE::LXC::Config->check_lock($conf);
+
+	    die "can't move volume: $volume if snapshot exists\n"
+		if %{$conf->{snapshots}};
+
+	    PVE::Tools::assert_if_modified($digest, $conf->{digest});
+
+	    die "Move Volume can't be done online.\n" if PVE::LXC::check_running($vmid);
+
+	    PVE::Cluster::log_msg('info', $authuser, "move_volume CT:$vmid Volume:$volume to Storage:$storage");
+	    my $realcmd = sub {
+
+		my $storage_cfg = PVE::Storage::config();
+
+		my $mp;
+		if ($volume eq 'rootfs') {
+		    $mp = PVE::LXC::Config->parse_ct_rootfs($conf->{$volume});
+		} else {
+		    $mp = PVE::LXC::Config->parse_ct_mountpoint($conf->{$volume});
+		}
+
+		my $old_volid =  $mp->{volume};
+
+		eval {
+		    $mp->{volume} = PVE::LXC::copy_volume($mp, $vmid, $vmid, $storage, $storage_cfg, $conf);
+
+		    $conf->{$volume} = PVE::LXC::Config->print_ct_mountpoint($mp, $volume eq 'rootfs');
+		};
+		if (my $err = $@) {
+		    die $err;
+		}
+
+		if ($delete) {
+		    PVE::Storage::vdisk_free($storage_cfg, $old_volid);
+		} else {
+		    my $unused = PVE::LXC::Config->add_unused_volume($conf, $old_volid);
+		    $conf->{$unused} = $old_volid;
+		}
+		PVE::LXC::Config->write_config($vmid, $conf);
+	    };
+
+	    return $rpcenv->fork_worker('move_volume', $vmid, $authuser, $realcmd);
+	};
+
+	return PVE::LXC::Config->lock_config($vmid, $code);
+  }});
 1;
diff --git a/src/PVE/CLI/pct.pm b/src/PVE/CLI/pct.pm
index ca87229..b6b834d 100755
--- a/src/PVE/CLI/pct.pm
+++ b/src/PVE/CLI/pct.pm
@@ -564,6 +564,7 @@ our $cmddef = {
     
     clone => [ "PVE::API2::LXC", 'clone_vm', ['vmid', 'newid'], { node => $nodename }, $upid_exit ],
     migrate => [ "PVE::API2::LXC", 'migrate_vm', ['vmid', 'target'], { node => $nodename }, $upid_exit],
+    move_volume => [ "PVE::API2::LXC", 'move_ct_volume', ['vmid', 'storage', 'volume'], { node => $nodename }, $upid_exit ],
     
     console => [ __PACKAGE__, 'console', ['vmid']],
     enter => [ __PACKAGE__, 'enter', ['vmid']],
-- 
2.1.4