[SOLVED] Re: Crunched my KVM VM...

[pseud]

Hello, I rather absent mindedly shut down my host with a VM running...
On attempting to boot that VM, it now fails with the error:
"unsupported configuration: only supports passthrough accessmode"
Using my least favourite search engine, that string produced zero results - which seems unusual.

Does anyone know of any possible fixes - or, should I just bin the VM and start again (it's only a weeks work after all...)

Thanks
Morgan

[TrevorH]

If you have sufficient space in /var/lib/libvirt/images then a host shutdown with running guests should save them to disk and resume them on reboot. That has always just worked out of the box for me with no changes.

Is this an x86_64 system? I am pretty sure the error is coming because of the cpu information you have given in your guest xml. What is the output from virsh dumpxml $vm ?

[pseud]

If you have sufficient space in /var/lib/libvirt/images then a host shutdown with running guests should save them to disk and resume them on reboot. That has always just worked out of the box for me with no changes

That's what I hoped - loads of space:

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# df
...
/dev/mapper/cl_frontserver-var_lib_libvirt  51396076 2703080  48692996   6% /var/lib/libvirt

Is this an x86_64 system?

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# uname -m
x86_64

What is the output from virsh dumpxml $vm ?

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# virsh dumpxml VortexBox25
<domain type='kvm'>
  <name>VortexBox25</name>
  <uuid>ad26c3fd-fa86-4a8f-bf4b-19cc7baa8c26</uuid>
  <metadata>
    <libosinfo:libosinfo xmlns:libosinfo="http://libosinfo.org/xmlns/libvirt/domain/1.0">
      <libosinfo:os id="http://fedoraproject.org/fedora/unknown"/>
    </libosinfo:libosinfo>
  </metadata>
  <memory unit='KiB'>2097152</memory>
  <currentMemory unit='KiB'>2097152</currentMemory>
  <vcpu placement='static'>2</vcpu>
  <os>
    <type arch='x86_64' machine='pc-i440fx-rhel7.6.0'>hvm</type>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
    <apic/>
  </features>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <devices>
    <emulator>/usr/libexec/qemu-kvm</emulator>
    <disk type='volume' device='disk'>
      <driver name='qemu' type='qcow2' cache='none'/>
      <source pool='default' volume='VortexBox25-sda'/>
      <target dev='vda' bus='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </disk>
    <disk type='block' device='disk'>
      <driver name='qemu' type='raw'/>
      <source dev='/dev/disk/by-id/ata-WDC_WD7500AYYS-01RCA0_WD-WCAPT0416563'/>
      <target dev='vdc' bus='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
    </disk>
    <disk type='file' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <target dev='hda' bus='ide'/>
      <readonly/>
      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
    </disk>
    <controller type='usb' index='0' model='piix3-uhci'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
    </controller>
    <controller type='pci' index='0' model='pci-root'/>
    <controller type='ide' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
    </controller>
    <filesystem type='mount' accessmode='mapped'>
      <driver type='handle' wrpolicy='immediate'/>
      <source dir='/run/media/kodi/Backup_good/home_Music'/>
      <target dir='/storage/music'/>
      <readonly/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
    </filesystem>
    <interface type='bridge'>
      <mac address='52:54:00:ba:c9:62'/>
      <source bridge='nm-bridge1'/>
      <model type='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </interface>
    <serial type='pty'>
      <target type='isa-serial' port='0'>
        <model name='isa-serial'/>
      </target>
    </serial>
    <console type='pty'>
      <target type='serial' port='0'/>
    </console>
    <input type='tablet' bus='usb'>
      <address type='usb' bus='0' port='1'/>
    </input>
    <input type='mouse' bus='ps2'/>
    <input type='keyboard' bus='ps2'/>
    <graphics type='vnc' port='-1' autoport='yes'>
      <listen type='address'/>
    </graphics>
    <video>
      <model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1' primary='yes'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </video>
    <memballoon model='virtio'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </memballoon>
    <rng model='virtio'>
      <backend model='random'>/dev/urandom</backend>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
    </rng>
    <panic model='isa'>
      <address type='isa' iobase='0x505'/>
    </panic>
  </devices>
</domain>

I don't think I changed anything after shutting down the host...
HAH! Fixed it - how nice to talk things through... Obviously I'd made a change to be applied on reboot...
Deleted:

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    <filesystem type='mount' accessmode='mapped'>
      <driver type='handle' wrpolicy='immediate'/>
      <source dir='/run/media/kodi/Backup_good/home_Music'/>
      <target dir='/storage/music'/>
      <readonly/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
    </filesystem>

Running now.