unable to migrate: virPortAllocatorSetUsed:299 : internal error: Failed to reserve port 49153

[Michal Privoznik]

On 10/26/20 9:39 AM, Michal Privoznik wrote:
> On 10/12/20 4:46 AM, Vjaceslavs Klimovs wrote:
>> On libvirt 6.8.0 and qemu 5.1.0, when trying to live migrate "error:
>> internal error: Failed to reserve port" error is received and
>> migration does not succeed:
>>
>> virsh # migrate cartridge qemu+tls://ratchet.lan/system --live
>> --persistent --undefinesource --copy-storage-all --verbose
>> error: internal error: Failed to reserve port 49153
>>
>> virsh #
>>
> 
> Sorry for not replying earlier. But this is a clear libvirt bug and I 
> think it's a regression introduced by the following commit:
> 
> https://gitlab.com/libvirt/libvirt/-/commit/e74d627bb3b
> 
> The problem is, if you have two or more disks that need to be copied 
> over to the destination, the @server_started variable is not set after 
> the first iteration of the "for (i = 0; i < vm->def->ndisks; i++)" loop. 
> I think this should be the fix:
> 

Actually, you will need a second patch too. Here's the series:

https://www.redhat.com/archives/libvir-list/2020-October/msg01358.html

Michal