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cloudbase / windows-imaging-tools

Tools to automate the creation of a Windows image for OpenStack, supporting KVM, Hyper-V, ESXi and more.
Apache License 2.0
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Mixed CPU infrastructure issues #361

Closed T0schi closed 3 years ago

T0schi commented 3 years ago

Hello community, since we upgraded our OpenStack environmet to Ussurri, we are facing more and more issues with our mixed CPU infrastructure ( Intel and AMD). We are creating our Windows images with the imaging tools on a bare metal host with Intel CPU´s. The creation is running fine, the image import to OpenStack also. But when a new instance is spawned and is placed on an AMD host, the VM always runs into a Bluescreen image After a migration ( even to another AMD host) the VM is booting without any problems.

Now i am struggling where to start searching for the issue. I haven´t found huge changes on Nova in the Ussuri release notes. Out settings [libvirt] inject_partition = -2 inject_password = False inject_key = False virt_type = kvm cpu_mode = custom cpu_model = Skylake-Server-IBRS cpu_model_extra_flags = null

As the VM´s are running fine after the migration, i assume that only come CPU flags / Metadata missing, which are set during the migration.

Is there a way to have or include a "CPU pre check" in the created images or is it an issue only related to Nova which has to be addressed there?

ader1990 commented 3 years ago

Hello,

I think setting this flag to false might work: https://github.com/cloudbase/windows-openstack-imaging-tools/blob/master/Config.psm1#L130

[sysprep]
persist_drivers_install=false

Thank you, Adrian Vladu

T0schi commented 3 years ago

Hi Adrian, thank you for the hint but changing this setting result in Bluescreens on every Boot on a AMD host, even after a migration (on Intel hosts everything is running fine). I´ve checked it with several Windows versions. Any other idea? If not, i think we have to test it with "cpu_mode = host-model" in nova.