[pve-devel] [PATCH v2 qemu-server 1/2] migrate: handle storage not selected manually in storage config

[Tim Marx]

e.g. local storage was considered not allowed for offline migration
even if it is available on all nodes, this should now be fixed as it
is now considered available on all nodes if a local storage isn't
restricted to a specific subset of the available nodes. The user is
responseable to make sure that the datacenter storage config reflects
the actual setup, so there is no additional check for local storages
which aren't available on all nodes if they are not explicitly marked
at datacenter level.

Signed-off-by: Tim Marx <t.marx at proxmox.com>
---
 PVE/API2/Qemu.pm  | 22 +++++++++++++++++-----
 PVE/QemuServer.pm | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 50 insertions(+), 5 deletions(-)

diff --git a/PVE/API2/Qemu.pm b/PVE/API2/Qemu.pm
index c9b2f67..1c4e07b 100644
--- a/PVE/API2/Qemu.pm
+++ b/PVE/API2/Qemu.pm
@@ -3163,7 +3163,12 @@ __PACKAGE__->register_method({
 	    allowed_nodes => {
 		type => 'array',
 		optional => 1,
-		description => "List nodes allowed for offline migration with same local storage as source node, only passed if VM is offline"
+		description => "List nodes allowed for offline migration, only passed if VM is offline"
+	    },
+	    not_allowed_nodes => {
+		type => 'object',
+		optional => 1,
+		description => "List not allowed nodes with additional informations, only passed if VM is offline"
 	    },
 	    local_disks => {
 		type => 'array',
@@ -3204,11 +3209,18 @@ __PACKAGE__->register_method({
 	# if vm is not running, return target nodes where local storage is available
 	# for offline migration
 	if (!$res->{running}) {
-	    my $shared_nodes = PVE::QemuServer::shared_nodes($vmconf, $storecfg);
-
-	    delete $shared_nodes->{$localnode} if $shared_nodes->{$localnode};
+	    $res->{allowed_nodes} = [];
+	    my $checked_nodes = PVE::QemuServer::check_local_storage_availability($vmconf, $storecfg);
+
+	    delete $checked_nodes->{$localnode} if $checked_nodes->{$localnode};
+	    foreach my $node (keys %$checked_nodes) {
+		if (!defined $checked_nodes->{$node}->{not_available_storages}){
+		    push @{$res->{allowed_nodes}}, $node;
+		    delete $checked_nodes->{$node};
+		}

-	    $res->{allowed_nodes} = [ keys %$shared_nodes ];
+	    }
+	    $res->{not_allowed_nodes} = $checked_nodes;
 	}


diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index fbfc3fb..1f3234f 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -2924,6 +2924,39 @@ sub shared_nodes {
     return $nodehash
 }

+sub check_local_storage_availability {
+    my ($conf, $storecfg) = @_;
+
+    my $nodelist = PVE::Cluster::get_nodelist();
+    my $nodehash = { map { $_ => {} } @$nodelist };
+
+    foreach_drive($conf, sub {
+	my ($ds, $drive) = @_;
+
+	my $volid = $drive->{file};
+	return if !$volid;
+
+	my ($storeid, $volname) = PVE::Storage::parse_volume_id($volid, 1);
+	if ($storeid) {
+	    my $scfg = PVE::Storage::storage_config($storecfg, $storeid);
+
+	    if ($scfg->{disable}) {
+		foreach my $node (keys %$nodehash) {
+		    push @{$nodehash->{$node}->{not_available_storages}}, $storeid;
+		}
+	    } elsif (my $avail = $scfg->{nodes}) {
+		foreach my $node (keys %$nodehash) {
+		    if (!$avail->{$node}) {
+			push @{$nodehash->{$node}->{not_available_storages}}, $storeid;
+		    }
+		}
+	    }
+	}
+    });
+
+    return $nodehash
+}
+
 sub check_cmdline {
     my ($pidfile, $pid) = @_;

--
2.11.0