[pve-devel] [PATCH manager v6 3/5] bulk migrate: include checks for live-migratable local resources

[Fiona Ebner]

Am 07.03.25 um 14:30 schrieb Fiona Ebner:
> Am 13.02.25 um 14:17 schrieb Dominik Csapak:
>> those should be able to migrate even for online vms. If the mapping does
>> not exist on the target node, that will be caught further down anyway.
>>
>> Signed-off-by: Dominik Csapak <d.csapak at proxmox.com>
>> ---
>> no changes in v6
>>  PVE/API2/Nodes.pm | 13 +++++++++++--
>>  1 file changed, 11 insertions(+), 2 deletions(-)
>>
>> diff --git a/PVE/API2/Nodes.pm b/PVE/API2/Nodes.pm
>> index f504e1b1..f5484280 100644
>> --- a/PVE/API2/Nodes.pm
>> +++ b/PVE/API2/Nodes.pm
>> @@ -2331,9 +2331,18 @@ my $create_migrate_worker = sub {
>>  	    $invalidConditions .= join(', ', map { $_->{volid} } @{$preconditions->{local_disks}});
>>  	}
>>  
>> +	# for a live migration all local_resources must be marked as live-migratable
>>  	if ($online && scalar($preconditions->{local_resources}->@*)) {
>> -	    $invalidConditions .= "\n  Has local resources: ";
>> -	    $invalidConditions .= join(', ', @{$preconditions->{local_resources}});
>> +	    my $resource_not_live = [];
>> +	    for my $resource ($preconditions->{local_resources}->@*) {
>> +		next if $preconditions->{'mapped-resource-info'}->{$resource}->{'live-migration'};
>> +		push $resource_not_live->@*, $resource;
>> +	    }
>> +
>> +	    if (scalar($resource_not_live->@*)) {
>> +		$invalidConditions .= "\n  Has local resources not marked as live migratable: ";
>> +		$invalidConditions .= join(', ', $resource_not_live->@*);
>> +	    }
>>  	}
>>  
>>  	if (my $not_allowed_nodes = $preconditions->{not_allowed_nodes}) {
> 
> Should we rather not add those to the "local_resources" result in the
> first place? I.e. in check_local_resources() we know whether it's a live
> migration or not based on the $state argument.
> 
> And towards the end of that function we could...
> 
>> 	if ($k =~ m/^hostpci/) {
>> 	    my $entry = parse_property_string('pve-qm-hostpci', $conf->{$k});
>> 	    if (my $name = $entry->{mapping}) {
>> 		$add_missing_mapping->('pci', $k, $name);
>> 		my $mapped_device = { name => $name };
>> 		$mapped_device->{'live-migration'} = 1
>> 		    if $pci_map->{ids}->{$name}->{'live-migration-capable'};
>> 		$mapped_res->{$k} = $mapped_device;
>> 	    }
>> 	}
>> 	# sockets are safe: they will recreated be on the target side post-migrate
>> 	next if $k =~ m/^serial/ && ($conf->{$k} eq 'socket');
> 
> ...do "next if live-migration" and not even add it.

Or rather, next if !missing mapping && (!$state or live-migration). I.e.
also not adding them for offline migration to the local resources in the
first place. AFAIU, local_resources/loc_res was intended to be the
current blockers for the offline or online migration at hand. Can we go
back and align the behavior to that meaning? Currently, we add mapped
devices even if they are not blockers. Do we already rely too much on that?

> 
>> 	push @loc_res, $k if $k =~ m/^(usb|hostpci|serial|parallel)\d+$/;
>