[pve-devel] [PATCH qemu-server/manager/docs v1 0/3] Live-Migration with VNC clipboard

[pve-devel] [PATCH qemu-server/manager/docs v1 0/3] Live-Migration with VNC clipboard

[Markus Frank]

The live-migration feature now works with qemu's upstream commit:
5d56bff11e ("ui/vdagent: add migration support")

https://github.com/qemu/qemu/commit/5d56bff11e3d7fdbbf7fda6c9a8ebd0d6b7a7bac


qemu-server:

Markus Frank (1):
  vga: allow live-migration with clipboard

 src/PVE/API2/Qemu.pm   | 5 -----
 src/PVE/QemuMigrate.pm | 5 -----
 src/PVE/QemuServer.pm  | 2 +-
 3 files changed, 1 insertion(+), 11 deletions(-)


manager:

Markus Frank (1):
  ui: display: remove 'vncMigration' hint

 www/manager6/qemu/DisplayEdit.js | 9 ---------
 1 file changed, 9 deletions(-)


docs:

Markus Frank (1):
  clipboard: remove 'live-migration not possible' note

 qm.adoc | 8 --------
 1 file changed, 8 deletions(-)

-- 
2.47.3



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[pve-devel] [PATCH qemu-server v1 1/3] vga: allow live-migration with clipboard

[Markus Frank]

The live-migration feature now works with qemu's upstream commit:
5d56bff11e ("ui/vdagent: add migration support")

Signed-off-by: Markus Frank <m.frank@proxmox.com>
---
 src/PVE/API2/Qemu.pm   | 5 -----
 src/PVE/QemuMigrate.pm | 5 -----
 src/PVE/QemuServer.pm  | 2 +-
 3 files changed, 1 insertion(+), 11 deletions(-)

diff --git a/src/PVE/API2/Qemu.pm b/src/PVE/API2/Qemu.pm
index 02f5caec..314b6a48 100644
--- a/src/PVE/API2/Qemu.pm
+++ b/src/PVE/API2/Qemu.pm
@@ -5267,11 +5267,6 @@ __PACKAGE__->register_method({
         my ($local_resources, $mapped_resources, $missing_mappings_by_node) =
             PVE::QemuMigrate::Helpers::check_local_resources($vmconf, $res->{running}, 1);
 
-        my $vga = PVE::QemuServer::parse_vga($vmconf->{vga});
-        if ($res->{running} && $vga->{'clipboard'} && $vga->{'clipboard'} eq 'vnc') {
-            push $local_resources->@*, "clipboard=vnc";
-        }
-
         $res->{allowed_nodes} = [];
         $res->{not_allowed_nodes} = {};
 
diff --git a/src/PVE/QemuMigrate.pm b/src/PVE/QemuMigrate.pm
index 6f7fd9f1..4f613ffb 100644
--- a/src/PVE/QemuMigrate.pm
+++ b/src/PVE/QemuMigrate.pm
@@ -293,11 +293,6 @@ sub prepare {
         }
     }
 
-    my $vga = PVE::QemuServer::parse_vga($conf->{vga});
-    if ($running && $vga->{'clipboard'} && $vga->{'clipboard'} eq 'vnc') {
-        die "VMs with 'clipboard' set to 'vnc' are not live migratable!\n";
-    }
-
     my $vollist = PVE::QemuServer::get_vm_volumes($conf);
 
     my $storages = {};
diff --git a/src/PVE/QemuServer.pm b/src/PVE/QemuServer.pm
index 1b9257ef..6d33bec0 100644
--- a/src/PVE/QemuServer.pm
+++ b/src/PVE/QemuServer.pm
@@ -184,7 +184,7 @@ my $vga_fmt = {
     clipboard => {
         description =>
             'Enable a specific clipboard. If not set, depending on the display type the'
-            . ' SPICE one will be added. Migration with VNC clipboard is not yet supported!',
+            . ' SPICE one will be added.',
         type => 'string',
         enum => ['vnc'],
         optional => 1,
-- 
2.47.3



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Re: [pve-devel] [PATCH qemu-server v1 1/3] vga: allow live-migration with clipboard

[Fiona Ebner]

Am 17.11.25 um 5:28 PM schrieb Markus Frank:
> The live-migration feature now works with qemu's upstream commit:
> 5d56bff11e ("ui/vdagent: add migration support")
> 
> Signed-off-by: Markus Frank <m.frank@proxmox.com>
> ---
>  src/PVE/API2/Qemu.pm   | 5 -----
>  src/PVE/QemuMigrate.pm | 5 -----
>  src/PVE/QemuServer.pm  | 2 +-
>  3 files changed, 1 insertion(+), 11 deletions(-)
> 
> diff --git a/src/PVE/API2/Qemu.pm b/src/PVE/API2/Qemu.pm
> index 02f5caec..314b6a48 100644
> --- a/src/PVE/API2/Qemu.pm
> +++ b/src/PVE/API2/Qemu.pm
> @@ -5267,11 +5267,6 @@ __PACKAGE__->register_method({
>          my ($local_resources, $mapped_resources, $missing_mappings_by_node) =
>              PVE::QemuMigrate::Helpers::check_local_resources($vmconf, $res->{running}, 1);
>  
> -        my $vga = PVE::QemuServer::parse_vga($vmconf->{vga});
> -        if ($res->{running} && $vga->{'clipboard'} && $vga->{'clipboard'} eq 'vnc') {
> -            push $local_resources->@*, "clipboard=vnc";
> -        }

I suppose this depends on having machine version >= 10.1, or? (In any
case QEMU binary version >= 10.1 but that is implied by machine version
>= 10.1)

> -
>          $res->{allowed_nodes} = [];
>          $res->{not_allowed_nodes} = {};
> 


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Re: [pve-devel] [PATCH qemu-server v1 1/3] vga: allow live-migration with clipboard

[Fiona Ebner]

Am 17.11.25 um 5:41 PM schrieb Fiona Ebner:
> Am 17.11.25 um 5:28 PM schrieb Markus Frank:
>> The live-migration feature now works with qemu's upstream commit:
>> 5d56bff11e ("ui/vdagent: add migration support")
>>
>> Signed-off-by: Markus Frank <m.frank@proxmox.com>
>> ---
>>  src/PVE/API2/Qemu.pm   | 5 -----
>>  src/PVE/QemuMigrate.pm | 5 -----
>>  src/PVE/QemuServer.pm  | 2 +-
>>  3 files changed, 1 insertion(+), 11 deletions(-)
>>
>> diff --git a/src/PVE/API2/Qemu.pm b/src/PVE/API2/Qemu.pm
>> index 02f5caec..314b6a48 100644
>> --- a/src/PVE/API2/Qemu.pm
>> +++ b/src/PVE/API2/Qemu.pm
>> @@ -5267,11 +5267,6 @@ __PACKAGE__->register_method({
>>          my ($local_resources, $mapped_resources, $missing_mappings_by_node) =
>>              PVE::QemuMigrate::Helpers::check_local_resources($vmconf, $res->{running}, 1);
>>  
>> -        my $vga = PVE::QemuServer::parse_vga($vmconf->{vga});
>> -        if ($res->{running} && $vga->{'clipboard'} && $vga->{'clipboard'} eq 'vnc') {
>> -            push $local_resources->@*, "clipboard=vnc";
>> -        }
> 
> I suppose this depends on having machine version >= 10.1, or? (In any
> case QEMU binary version >= 10.1 but that is implied by machine version >= 10.1)
Sorry, there was an accidental quote here by '>' ending up at the
beginning of the line ;)


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Re: [pve-devel] [PATCH qemu-server v1 1/3] vga: allow live-migration with clipboard

[Markus Frank]

On 2025-11-17 17:43, Fiona Ebner wrote:
> Am 17.11.25 um 5:41 PM schrieb Fiona Ebner:
>> Am 17.11.25 um 5:28 PM schrieb Markus Frank:
>>> The live-migration feature now works with qemu's upstream commit:
>>> 5d56bff11e ("ui/vdagent: add migration support")
>>>
>>> Signed-off-by: Markus Frank <m.frank@proxmox.com>
>>> ---
>>>   src/PVE/API2/Qemu.pm   | 5 -----
>>>   src/PVE/QemuMigrate.pm | 5 -----
>>>   src/PVE/QemuServer.pm  | 2 +-
>>>   3 files changed, 1 insertion(+), 11 deletions(-)
>>>
>>> diff --git a/src/PVE/API2/Qemu.pm b/src/PVE/API2/Qemu.pm
>>> index 02f5caec..314b6a48 100644
>>> --- a/src/PVE/API2/Qemu.pm
>>> +++ b/src/PVE/API2/Qemu.pm
>>> @@ -5267,11 +5267,6 @@ __PACKAGE__->register_method({
>>>           my ($local_resources, $mapped_resources, $missing_mappings_by_node) =
>>>               PVE::QemuMigrate::Helpers::check_local_resources($vmconf, $res->{running}, 1);
>>>   
>>> -        my $vga = PVE::QemuServer::parse_vga($vmconf->{vga});
>>> -        if ($res->{running} && $vga->{'clipboard'} && $vga->{'clipboard'} eq 'vnc') {
>>> -            push $local_resources->@*, "clipboard=vnc";
>>> -        }
>>
>> I suppose this depends on having machine version >= 10.1, or? (In any
>> case QEMU binary version >= 10.1 but that is implied by machine version >= 10.1)

Yes, it needs QEMU version >= 10.1. However, when I set the machine version to < 10.1
(tested with version 6.2), the migration still works fine and the clipboard still functions on the other node.
It seems that the machine version is unrelated here.

I suppose it would be better to check the QEMU version using get_running_qemu_version, wouldn't it?


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Re: [pve-devel] [PATCH qemu-server v1 1/3] vga: allow live-migration with clipboard

[Fiona Ebner]

Am 19.11.25 um 3:17 PM schrieb Markus Frank:
> On 2025-11-17 17:43, Fiona Ebner wrote:
>> Am 17.11.25 um 5:41 PM schrieb Fiona Ebner:
>>> Am 17.11.25 um 5:28 PM schrieb Markus Frank:
>>>> The live-migration feature now works with qemu's upstream commit:
>>>> 5d56bff11e ("ui/vdagent: add migration support")
>>>>
>>>> Signed-off-by: Markus Frank <m.frank@proxmox.com>
>>>> ---
>>>>   src/PVE/API2/Qemu.pm   | 5 -----
>>>>   src/PVE/QemuMigrate.pm | 5 -----
>>>>   src/PVE/QemuServer.pm  | 2 +-
>>>>   3 files changed, 1 insertion(+), 11 deletions(-)
>>>>
>>>> diff --git a/src/PVE/API2/Qemu.pm b/src/PVE/API2/Qemu.pm
>>>> index 02f5caec..314b6a48 100644
>>>> --- a/src/PVE/API2/Qemu.pm
>>>> +++ b/src/PVE/API2/Qemu.pm
>>>> @@ -5267,11 +5267,6 @@ __PACKAGE__->register_method({
>>>>           my ($local_resources, $mapped_resources,
>>>> $missing_mappings_by_node) =
>>>>              
>>>> PVE::QemuMigrate::Helpers::check_local_resources($vmconf, $res-
>>>> >{running}, 1);
>>>>   -        my $vga = PVE::QemuServer::parse_vga($vmconf->{vga});
>>>> -        if ($res->{running} && $vga->{'clipboard'} && $vga-
>>>> >{'clipboard'} eq 'vnc') {
>>>> -            push $local_resources->@*, "clipboard=vnc";
>>>> -        }
>>>
>>> I suppose this depends on having machine version >= 10.1, or? (In any
>>> case QEMU binary version >= 10.1 but that is implied by machine
>>> version >= 10.1)
> 
> Yes, it needs QEMU version >= 10.1. However, when I set the machine
> version to < 10.1
> (tested with version 6.2), the migration still works fine and the
> clipboard still functions on the other node.
> It seems that the machine version is unrelated here.
> 
> I suppose it would be better to check the QEMU version using
> get_running_qemu_version, wouldn't it?

But what if the target node has an older binary version? It won't
understand the new data in the migration stream, right? Such changes to
the migration stream should always be protected by machine version AFAIK
and it smells like a bug in QEMU if it isn't protected like that in QEMU
internally.

Could you test what happens when the target is an older binary?


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[pve-devel] [PATCH manager v1 2/3] ui: display: remove 'vncMigration' hint

[Markus Frank]

The live-migration feature now works with qemu's upstream commit:
5d56bff11e ("ui/vdagent: add migration support")

Signed-off-by: Markus Frank <m.frank@proxmox.com>
---
 www/manager6/qemu/DisplayEdit.js | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/www/manager6/qemu/DisplayEdit.js b/www/manager6/qemu/DisplayEdit.js
index ab07fd31..cd5f7abf 100644
--- a/www/manager6/qemu/DisplayEdit.js
+++ b/www/manager6/qemu/DisplayEdit.js
@@ -136,15 +136,6 @@ Ext.define('PVE.qemu.DisplayInputPanel', {
                 hidden: '{hideVNCHint}',
             },
         },
-        {
-            xtype: 'displayfield',
-            name: 'vncMigration',
-            userCls: 'pmx-hint',
-            value: gettext('You cannot live-migrate while using the VNC clipboard.'),
-            bind: {
-                hidden: '{hideVNCHint}',
-            },
-        },
         {
             xtype: 'displayfield',
             name: 'defaultHint',
-- 
2.47.3



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[pve-devel] [PATCH docs v1 3/3] clipboard: remove 'live-migration not possible' note

[Markus Frank]

The live-migration feature now works with qemu's upstream commit:
5d56bff11e ("ui/vdagent: add migration support")

Signed-off-by: Markus Frank <m.frank@proxmox.com>
---
 qm.adoc | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/qm.adoc b/qm.adoc
index eb6ab4d..9bd2c3e 100644
--- a/qm.adoc
+++ b/qm.adoc
@@ -1030,14 +1030,6 @@ SPICE, virtio or virgl, you'll need to choose which clipboard to use.
 This is because the default *SPICE* clipboard will be replaced by the
 *VNC* clipboard, if `clipboard` is set to `vnc`.
 
-// TODO: Change NOTE below when live-migration patch is packaged in pve-qemu:
-// https://lists.gnu.org/archive/html/qemu-devel/2025-05/msg05656.html
-NOTE: In order to enable the VNC clipboard, QEMU is configured to use the
-qemu-vdagent device.
-https://lists.gnu.org/archive/html/qemu-devel/2021-08/msg05393.html[Currently,
-the qemu-vdagent device does not support live migration.] This means that a VM
-with an enabled VNC clipboard cannot be live-migrated at the moment.
-
 [[qm_usb_passthrough]]
 USB Passthrough
 ~~~~~~~~~~~~~~~
-- 
2.47.3



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