Created attachment 1939992 [details]
vm with memory conflict

Description of problem:
When using instance type and setting "spec.template.spec.domain.resources.requests.memory" we get a "VM field conflicts" error. this prevents the use of other parameters of InstanceType that require those fields such as: "guestMappingPassthrough", "IOThreadsPolicy"

EDIT: this bug will used to follow adding `guestMappingPassthrough` to the list of blocked instance type attributes

Version-Release number of selected component (if applicable):
4.13

How reproducible:
100%

Steps to Reproduce:
1. Create an InstanceType with "guestMappingPassthrough" + "IOThreadsPolicy"
2. Create a VM with the InstanceType

Actual results:
When trying to set "spec.template.spec.domain.resources.requests.memory":

HTTP response body: b'{"kind":"Status","apiVersion":"v1","metadata":{},"status":"Failure","message":"admission webhook \\"virtualmachine-validator.kubevirt.io
" denied the request: VM field conflicts with selected Instancetype","reason":"Invalid","details":{"causes":[

{"reason":"FieldValueInvalid","message":"VM field conflicts with selected Instancetype","field":"spec.template.spec.domain.resources.requests.memory"}

]},"code":422}\n'

When trying to set "guestMappingPassthrough" + "IOThreadsPolicy":

HTTP response body: b'{"kind":"Status","apiVersion":"v1","metadata":{},"status":"Failure","message":"admission webhook \\"virtualmachine-validator.kubevirt.io
" denied the request: spec.template.spec.domain.resources.requests.memory \'0\' must be equal to or larger than page size spec.template.spec.domain.hugepages.size \'1Gi\', spec.template.spec.domain.cpu.dedicatedCpuPlacement must be set to true when NUMA topology strategy is set in spec.template.spec.domain.cpu.numa.guestMappingPassthrough, Invalid IOThreadsPolicy (demi-io-thread-policy)","reason":"Invalid","details":{"causes":[

{"reason":"FieldValueInvalid","message":"spec.template.spec.domain.resources.requests.memory \'0\' must be equal to or larger than page size spec.template.spec.domain.hugepages.size \'1Gi\'","field":"spec.template.spec.domain.resources.requests.memory"}

,

{"reason":"FieldValueInvalid","message":"spec.template.spec.domain.cpu.dedicatedCpuPlacement must be set to true when NUMA topology strategy is set in spec.template.spec.domain.cpu.numa.guestMappingPassthrough","field":"spec.template.spec.domain.cpu.numa.guestMappingPassthrough"}

,

{"reason":"FieldValueInvalid","message":"Invalid IOThreadsPolicy (demi-io-thread-policy)","field":"spec.template.spec.domain.ioThreadsPolicy"}

]},"code":422}\n

Expected results:
VM is created

Additional info: