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as I'm not sure if I've had enough coffee, I'd like to consult here before opening a ticket. Yesterday we had planned maintenance, and one of the things done was to move the Management OS interfaces of all our Hyper-V hosts to our management VLAN. Until now they were in the VLAN were (most) of our VM's actually belong. The Veeam server was still in that production LAN, as that's were the hosts reside, and therefore no need to route all traffic through the firewalls (offhost never worked well for us). I opened ALL protocols (UDP, TCP, ICMP and all others) from the Veeam server to the Hyper-V hosts, and vice versa. I know about the firewall requirements, but for now I just allowed all.
Still, I now got messages like:
22-10-2018 06:22:14 :: Unable to allocate processing resources. Error: Unable to find Hyper-V hosts where VM '<VM GUIS>' is registered
However, in the job themselves, I could see the VM's just fine, application aware tests worked fine, the hosts themselves were accessible and 'rescannable' without issues, repositories were available. I just could not find any communications issue, as, well everything was opened up.
In the end I ended up moving the Veeam host to the management VLAN as well, which was an open point anyway now the Hyper-V hosts had moved, and after that everything works as expected again. However, I still wonder why I was getting these issues. Anyone with some insights?
- Product Manager
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- Full Name: Mike Resseler
- Location: Belgium
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- Full Name: Janne Mustonen
The fix was easy, I just had to reboot the Veeam-server. I think it may have been sufficient just to restart Veeam services, but I did install Windows Updates, so reboot was necessary anyways.
I believe that Veeam has some sort of cache of the Hyper-V Hosts and VM's, and this gets cleared on service/server restart. But I'm only guessing here..
- Veeam Software
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- Full Name: Alexander Fogelson
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