Description of problem: I installed OpenShift Virtualization 4.8.1 and created different VMs with different specs. I used different numbers for cpu core field. However, Kubevirt doesn't change the requested cpu amount in virt-launcher spec. It was always 100m. Version-Release number of selected component (if applicable): 4.8.1 Actual results: All virt-launcher pods contains the same amount of cpu. 100m Expected results: It should be proportional to VM spec as explained here: http://kubevirt.io/user-guide/operations/node_overcommit/#node-cpu-allocation-ratio Additional info: HCO is not setting cpuAllocationRatio in Kubevirt and it is empty by default.
Tried to reproduce this: a) Explicitly set the "cpuAllocationRatio" value via the JSON Annotation Patch. ]$ oc annotate --overwrite -n openshift-cnv hyperconverged kubevirt-hyperconverged kubevirt.kubevirt.io/jsonpatch='[{ "op": "add", "path": "/spec/configuration/developerConfiguration/cpuAllocationRatio", "value": 20 }]' b) Value appears set correctly ]$ oc get kubevirt kubevirt-kubevirt-hyperconverged -n openshift-cnv -o yaml | grep -A 5 "configuration:" configuration: developerConfiguration: cpuAllocationRatio: 20 diskVerification: memoryLimit: 2G featureGates: c) I had set the "cores" count under "cpu" as 6 ]$ oc get vmi vm22-rhel84-ocs -o yaml | grep -A 5 "cpu:" cpu: cores: 6 sockets: 1 threads: 1 --- d) virt-launcher pod shows "cpu: 100m" ]$ oc get pod virt-launcher-vm22-rhel84-ocs-sv46l -o yaml | grep "cpu:" cpu: 100m POD CPU request = number of vCPUs * 1/cpuAllocationRatio Probably the expected value should have been 6/20 = 330m or 300m , IIUC --- e) Logged into the VM and checked for the nproc value. It is indeed 6. [cloud-user@vm22-rhel84-ocs ~]$ nproc 6
comment1 stuff was reproduced on CNV-4.9.0.
I've posted https://github.com/kubevirt/kubevirt/pull/6374 to fix this.
With the following: [kbidarka@localhost ocs]$ oc get vmi vm-rhel84-ocs -o yaml | grep -A 5 "cpu:" -- cpu: cores: 6 sockets: 1 threads: 1 --- [kbidarka@localhost ocs]$ oc get pod virt-launcher-vm-rhel84-ocs-xkphg -o yaml | grep "cpu:" f:cpu: {} cpu: 300m [kbidarka@localhost ocs]$ oc get kubevirt kubevirt-kubevirt-hyperconverged -n openshift-cnv -o yaml | grep -A 5 "configuration:" -- configuration: developerConfiguration: cpuAllocationRatio: 20 diskVerification: memoryLimit: 2G featureGates: --- With default value of "cpuAllocationRatio" as 10 [kbidarka@localhost ocs]$ oc get pod virt-launcher-vm-rhel84-ocs-g9kx7 -o yaml | grep "cpu:" f:cpu: {} cpu: 600m --- VERIFIED with virt-operator-container-v4.9.1-4
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (OpenShift Virtualization 4.9.1 Images), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2021:5091