Enable dynamic scaling of Kubernetes cluster offerings for KVM

[bernardodemarco]

Description

PR #12975 introduced support for live scaling VMs with fixed service offerings on KVM. However, it did not remove a constraint in the Kubernetes cluster scaling workflow that prevented changing cluster compute offerings while the clusters were running.

This PR removes this leftover constraint, enabling dynamic scaling of Kubernetes cluster offerings.

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Enhancement (improves an existing feature and functionality)
• Cleanup (Code refactoring and cleanup, that may add test cases)
• Build/CI
• Test (unit or integration test code)

Feature/Enhancement Scale or Bug Severity

Feature/Enhancement Scale

• Major
• Minor

Screenshots (if appropriate):

How Has This Been Tested?

• Created a k8s cluster with a compute offering of 2 vCPUs and 4096 MiB of memory (without CPU cap):

  k8s cluster details

  

• Scaled the k8s cluster and upgraded its offering to 2 vCPUs and 4096 MiB of memory (with CPU cap):

  k8s cluster control plane VM XML

  <maxMemory slots='16' unit='KiB'>15327232</maxMemory>
  <memory unit='KiB'>4194304</memory>
  <currentMemory unit='KiB'>4194304</currentMemory>
  <vcpu placement='static' current='2'>8</vcpu>
  <cputune>
      <shares>835</shares>
      <period>10000</period>
      <quota>3300</quota>
  </cputune>

• Scaled the worker nodes compute offering to 3 vCPUs and 4096 MiB of memory (with CPU cap):

  k8s cluster details

  
  k8s cluster worker plane VM XML

  <maxMemory slots='16' unit='KiB'>15327232</maxMemory>
  <memory unit='KiB'>4194304</memory>
  <currentMemory unit='KiB'>4194304</currentMemory>
  <vcpu placement='static' current='3'>8</vcpu>
  <vcpus>
      <vcpu id='0' enabled='yes' hotpluggable='no' order='1'/>
      <vcpu id='1' enabled='yes' hotpluggable='no' order='2'/>
      <vcpu id='2' enabled='yes' hotpluggable='yes' order='3'/>
      <vcpu id='3' enabled='no' hotpluggable='yes'/>
      <vcpu id='4' enabled='no' hotpluggable='yes'/>
      <vcpu id='5' enabled='no' hotpluggable='yes'/>
      <vcpu id='6' enabled='no' hotpluggable='yes'/>
      <vcpu id='7' enabled='no' hotpluggable='yes'/>
  </vcpus>

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 18.10%. Comparing base (21b2025) to head (55ba389).
⚠️ Report is 196 commits behind head on main.

Files with missing lines	Patch %	Lines
...er/actionworkers/KubernetesClusterScaleWorker.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #13226      +/-   ##
============================================
+ Coverage     17.67%   18.10%   +0.42%     
- Complexity    15792    16749     +957     
============================================
  Files          5922     6037     +115     
  Lines        533165   542924    +9759     
  Branches      65208    66482    +1274     
============================================
+ Hits          94242    98292    +4050     
- Misses       428276   433584    +5308     
- Partials      10647    11048     +401     

Flag	Coverage Δ
uitests	3.51% <ø> (-0.18%)	⬇️
unittests	19.26% <0.00%> (+0.51%)	⬆️

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[winterhazel]

@blueorangutan package

[blueorangutan]

@winterhazel a [SL] Jenkins job has been kicked to build packages. It will be bundled with no SystemVM templates. I'll keep you posted as I make progress.

[blueorangutan]

Packaging result [SF]: ✖️ el8 ✖️ el9 ✖️ debian ✖️ suse15. SL-JID 17998