StepBee commented on issue #6807:
URL: https://github.com/apache/cloudstack/issues/6807#issuecomment-1286900761
An update after further testing - i think the issue came with the update to
Cloudstack Version 4.17.0.1
I found out i can create a VM with a custom offering and 2 vCPU
`virsh dumpxml <vmid>` shows:
` <vcpu placement='static' current='2'>16</vcpu>
<cputune>
<shares>800</shares>
</cputune>`
While the VM is running, i can scale the VM with the custom service offering
to 4 vCPU, reboot the VM from the operating system (not cloudstack!) and the OS
is seeing the 4 vCPUs and is running fine.
`virsh dumpxml <vmid>` shows:
` <vcpu placement='static' current='4'>16</vcpu>
<vcpus>
<vcpu id='0' enabled='yes' hotpluggable='no' order='1'/>
<vcpu id='1' enabled='yes' hotpluggable='no' order='2'/>
<vcpu id='2' enabled='yes' hotpluggable='yes' order='3'/>
<vcpu id='3' enabled='yes' hotpluggable='yes' order='4'/>
<vcpu id='4' enabled='no' hotpluggable='yes'/>
<vcpu id='5' enabled='no' hotpluggable='yes'/>
<vcpu id='6' enabled='no' hotpluggable='yes'/>
<vcpu id='7' enabled='no' hotpluggable='yes'/>
<vcpu id='8' enabled='no' hotpluggable='yes'/>
<vcpu id='9' enabled='no' hotpluggable='yes'/>
<vcpu id='10' enabled='no' hotpluggable='yes'/>
<vcpu id='11' enabled='no' hotpluggable='yes'/>
<vcpu id='12' enabled='no' hotpluggable='yes'/>
<vcpu id='13' enabled='no' hotpluggable='yes'/>
<vcpu id='14' enabled='no' hotpluggable='yes'/>
<vcpu id='15' enabled='no' hotpluggable='yes'/>
</vcpus>
<cputune>
<shares>1600</shares>
</cputune>`
When i stop the VM from cloudstack and try to start the VM via cloudstack
again, it fails with the mentioned error.
Today i looked at a VM, which was created before the update to 4.17.0.1,
using exactly the same custom service offering and using 8 vCPUs:
`virsh dumpxml <other-vmid>` shows
` <vcpu placement='static'>8</vcpu>
<cputune>
<shares>4000</shares>
</cputune>`
There seems to be a difference in 4.17.0.1 in the way the XML for qemu is
generated for VMs based on custom contrained service offerings, mainly listing
all vcpus in a <vcpus> tag, which seems to conflict with qemu ?
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