[rhelv6-list] KVM issues post RHEL6-1->6.2 update

[Robin Price II]

On 12/08/2011 04:31 AM, Ben wrote:
> My questions are:
>
> 1) Is it a bad idea to patch the host's libvirtd while guests are running?
> 2) Should libvirtd have killed the guests like that?
> 3) With this update to KVM/qemu/libvird are "address type='pci'" now
> unnecessary and removable from /etc/libvirt/qemu/<domain>.xml files as
> PCI IDs are now dynamically assigned?

Ben,

Sorry to hear your upgrade was a PITA.  :(

1) With any patching or upgrading for a KVM host or non-KVM host should 
be done in a maintenance window.  I normally stop all of my guests 
before I fully upgrade my host KVM.  I did this yesterday.  All guests 
were off and then I brought up my host machine to RHEL6.2.  From there I 
brought up my RHEL6.1 guest to RHEL6.2.

2) I am not sure what the results would be if I was to upgrade all the 
packages with running guests.  Sounds like your scenario is what would 
happen.  Have you ever upgraded Firefox while running the older instance 
and never relaunching the browser?  I have done this before and Firefox 
starts acting crazy.  I now close the browser, update (patch) FF and 
relaunch.  I would expect libvirtd it act in a similar fashion towards 
it's running guests.

3) Not sure?  I didn't notice.  FWIW, here is some snips from my guests 
XML configurations:

[root at x200 ~]# virsh dumpxml RHEL5 | grep address
       <address type='pci' domain='0x0000' bus='0x00' slot='0x05' 
function='0x0'/>
       <mac address='52:54:00:5f:41:cf'/>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x03' 
function='0x0'/>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x04' 
function='0x0'/>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x02' 
function='0x0'/>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x06' 
function='0x0'/>

[root at x200 ~]# virsh dumpxml RHEL6 | grep address
       <address type='pci' domain='0x0000' bus='0x00' slot='0x05' 
function='0x0'/>
       <mac address='52:54:00:a2:b0:a2'/>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x03' 
function='0x0'/>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x04' 
function='0x0'/>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x02' 
function='0x0'/>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x06' 
function='0x0'/>


HTHs,

~rp

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