I only have a Home Assistant Virtual Machine running on my server with unRAID v6.9.2 and libvirt v6.5.0. 

 

It's been working fine for the most parts. However, after waking up this morning, I found out that the virtual machine disappeared. I checked the webGUI and saw in the Virtual Machines tab a big yellow banner that said "Libvirt Service failed to start". I know that I should have taken a screenshot of the page before proceeding but I forgot to log it down.

 

I turned off and on the virtual machine support in the settings menu but nothing changed. I then checked the logs and it was clean, no error messages whatsoever. The last approach I took was to reboot the whole system. I rebooted it, started up the array, re-enabled VM support in the menu and now it's working fine. Checking the logs, there is an entry in it that is suspiciously foreboding. 

2021-10-01 02:21:44.048+0000: 12337: info : libvirt version: 6.5.0
2021-10-01 02:21:44.048+0000: 12337: info : hostname: Babel
2021-10-01 02:21:44.048+0000: 12337: warning : networkNetworkObjTaint:5292 : Network name='default' uuid=a67b7b9b-bef4-488b-b243-c9e5f391a3b1 is tainted: hook-script
2021-10-01 02:21:44.923+0000: 12337: warning : qemuDomainObjTaint:6075 : Domain id=1 name='HomeAssistant' uuid=78b2f542-3fd7-039d-f5a5-7866d93e49d6 is tainted: high-privileges
2021-10-01 02:21:44.923+0000: 12337: warning : qemuDomainObjTaint:6075 : Domain id=1 name='HomeAssistant' uuid=78b2f542-3fd7-039d-f5a5-7866d93e49d6 is tainted: host-cpu
2021-10-01 02:21:45.764+0000: 12321: error : virNetSocketReadWire:1826 : End of file while reading data: Input/output error

 

It raises an EoF error message. The first guess I have is that it might have something to do with the fact that my libvirt.img file is hosted on my cache drive but then I would also expect a similar issue with my docker containers which are also running on the same cache drive, which is not the case! I'm posting this here in hope that someone out there may shed some light on this issue.

I am wondering is this was ever resolved?  I now get the below error in my libvirt logs myself.

virNetSocketReadWire:1803 : End of file while reading data: Input/output error

Also wondering if this was resolved. Same problem. 😕