Bug 2148837

Description of problem:

[1] Created a VM with below resources.limit.memory and resources.requests.memory.

~~~
# oc get vm rhel7-forward-rook -o yaml |yq -y '.spec.template.spec.domain.resources'
limits:
  memory: 5Gi
requests:
  memory: 4Gi
~~~

The namespace has got Max Limit/Request Ratio for memory set to 2.

~~~
# oc describe limits
Name:       resource-limits
Namespace:  nijin-cnv
Type        Resource  Min  Max  Default Request  Default Limit  Max Limit/Request Ratio
----        --------  ---  ---  ---------------  -------------  -----------------------
Container   cpu       -    2    2                2              -
Container   memory    -    8Gi  4Gi              4Gi            2                          <<<
~~~

[2] Increased the VM memory to 5 Gi from the web UI. 

~~~
Click on VM => Details => Edit CPU | Memory
~~~

This only increased the requests and not the limits.

~~~
# oc get vm rhel7-forward-rook -o yaml|yq -y '.spec.template.spec.domain.resources'
limits:
  memory: 5Gi
requests:
  memory: 5Gi
~~~

VM will start since the ratio is 1 less than maxLimitRequestRatio.


[3] Decreased the VM memory to 2 Gi from web UI and now, the VM startup fails with the error below because the ratio is more than 2:

~~~
Click on VM => Details => Edit CPU | Memory
~~~


~~~
5s          Warning   FailedCreate                 virtualmachineinstance/rhel7-forward-rook              (combined from similar events): Error creating pod: pods "virt-launcher-rhel7-forward-rook-f78gg" is forbidden: memory max limit to request ratio per Container is 2, but provided ratio is 2.342071
~~~

In [2] and [3], there is no option to mention the limits. Also, it doesn't increase the limits automatically in proportion to the increase in requests.


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

OpenShift Virtualization   4.11.0


How reproducible:

100%

Steps to Reproduce:

Please refer above.

Actual results:

Limits are not changed/no options to change the  limits while increasing/decreasing the virtual machine resources from GUI

Expected results:

The customer is expecting to decrease/increase the limits in proportion to the increase/decrease of the requests.


Additional info: