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Old 06-09-2021, 11:13 PM   #1
tpolim008
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Registered: Jul 2016
Posts: 28

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Centos 8 update to kernel after reboot VM error


Hello I am running centos 8 after installed the latest updates which installed a new kernel my vms will no longer start. I ran sudo yum upgrade which upgraded my server along with a ton of other packages, one which was my kernel... WHich was kernel-core-4.18.0-305.3.1.el8.x86_64 not sure if this is the cause but knowing a kernel upgrade and cause man issues I suspect it is... needless to say after the required reboot, attempting to start my VM I get the following error


Code:
[root@vhost01-netengsrv01 ~]# virsh start netengsrv01-vm
error: Failed to start domain netengsrv01-vm
error: operation failed: guest CPU doesn't match specification: missing features: ss
can any one offer some help on how to resolve this as I am not seeing much while googling this?
 
Old 06-10-2021, 09:48 AM   #2
tpolim008
LQ Newbie
 
Registered: Jul 2016
Posts: 28

Original Poster
Rep: Reputation: Disabled
Quote:
Originally Posted by tpolim008 View Post
Hello I am running centos 8 after installed the latest updates which installed a new kernel my vms will no longer start. I ran sudo yum upgrade which upgraded my server along with a ton of other packages, one which was my kernel... WHich was kernel-core-4.18.0-305.3.1.el8.x86_64 not sure if this is the cause but knowing a kernel upgrade and cause man issues I suspect it is... needless to say after the required reboot, attempting to start my VM I get the following error


Code:
[root@vhost01-netengsrv01 ~]# virsh start netengsrv01-vm
error: Failed to start domain netengsrv01-vm
error: operation failed: guest CPU doesn't match specification: missing features: ss
can any one offer some help on how to resolve this as I am not seeing much while googling this?
After several hours it turns out this was related to the Kernel upgrade. What ended up happening is that upgrade changed the CPU type for the VM, once I toggled the CPU type back to what it was previous the VM then booted.
 
  


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