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Make kubevirt's CPU allocation ratio configurable - #905

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Timofei Larkin (lllamnyp) merged 1 commit into
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feat/configurable-cpu-allocation-ratio
Apr 30, 2025
Merged

Make kubevirt's CPU allocation ratio configurable#905
Timofei Larkin (lllamnyp) merged 1 commit into
mainfrom
feat/configurable-cpu-allocation-ratio

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@lllamnyp

@lllamnyp Timofei Larkin (lllamnyp) commented Apr 29, 2025 •
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Kubevirt's default cpu-to-vcpu ration is 1:10, which might be a bit extreme for some users. This patch introduces a new key in the Cozystack configmap, "cpu-allocation-ratio" where admins of Cozystack can specify an alternative value, if needed.

Summary by CodeRabbit

  • New Features
    • Added support for optionally configuring a CPU allocation ratio for KubeVirt deployments when the relevant setting is provided.
  • Chores
    • Improved configuration flexibility for KubeVirt by allowing dynamic injection of CPU allocation settings.

@lllamnyp
Make kubevirt's CPU allocation ratio configurable
6106a9f 
Kubevirt's default cpu-to-vcpu ration is 1:10, which might be a bit
extreme for some users. This patch introduces a new key in the Cozystack
configmap, "cpu-allocation-ratio" where admins of Cozystack can specify
an alternative value, if needed.

Signed-off-by: Timofei Larkin <lllamnyp@gmail.com>
@coderabbitai

coderabbitai Bot commented Apr 29, 2025 •
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Walkthrough

A conditional mechanism was introduced to propagate a cpuAllocationRatio value from a configuration source into the KubeVirt Helm release and its custom resource manifest. The system now checks for a cpu-allocation-ratio key in the cozystack ConfigMap and, if present, includes this value in both the Helm chart values and the KubeVirt CR's developerConfiguration. No changes were made to exported or public entity declarations, and the update is limited to YAML configuration and templating logic.

Changes

File(s) Change Summary
packages/core/platform/bundles/paas-full.yaml Added a conditional block to inject cpuAllocationRatio from cozystack ConfigMap into the Helm release values for KubeVirt.
packages/system/kubevirt/templates/kubevirt-cr.yaml Updated the KubeVirt CR template to conditionally include the cpuAllocationRatio field if the value is set.

Sequence Diagram(s)

sequenceDiagram
    participant ConfigMap (cozystack)
    participant Helm Release (kubevirt)
    participant KubeVirt CR

    ConfigMap-->>Helm Release: Provide cpu-allocation-ratio (if exists)
    Helm Release-->>KubeVirt CR: Inject cpuAllocationRatio into developerConfiguration (if set)
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Poem

In YAML fields where configs grow,
A ratio for CPUs now may show.
If cozystack whispers the magic key,
KubeVirt will set it, as quick as can be.
Rabbits hop, templates bloom,
Conditional logic finds its room! 🐇✨

📜 Recent review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 108fc64 and 6106a9f.

📒 Files selected for processing (2)
  • packages/core/platform/bundles/paas-full.yaml (1 hunks)
  • packages/system/kubevirt/templates/kubevirt-cr.yaml (1 hunks)
🧰 Additional context used
🪛 YAMLlint (1.35.1)
packages/system/kubevirt/templates/kubevirt-cr.yaml

[warning] 14-14: wrong indentation: expected 4 but found 6

(indentation)

[error] 13-13: syntax error: expected the node content, but found '-'

(syntax)

⏰ Context from checks skipped due to timeout of 90000ms (1)
  • GitHub Check: Build and Test
🔇 Additional comments (2)
packages/core/platform/bundles/paas-full.yaml (1)

137-141: Simplify and ensure valid YAML indentation for the cpuAllocationRatio block
The new block correctly reads cpu-allocation-ratio from the ConfigMap and conditionally injects it into values. To reduce boilerplate and avoid potential indentation pitfalls, you can use a with directive and eliminate the temporary variable. For example:

-  {{- $cpuAllocationRatio := index $cozyConfig.data "cpu-allocation-ratio" }}
-  {{- if $cpuAllocationRatio }}
-  values:
-    cpuAllocationRatio: {{ $cpuAllocationRatio }}
-  {{- end }}
+  {{- with index $cozyConfig.data "cpu-allocation-ratio" }}
+  values:
+    cpuAllocationRatio: {{ . }}
+  {{- end }}

This also shrinks the code and aligns the block under the existing release fields.
[ suggest_optional_refactor ] [ request_verification ]

To verify correct rendering and indentation, run:

yamllint -d "{extends: default}" packages/core/platform/bundles/paas-full.yaml
helm template cozystack packages/core/platform/bundles/paas-full.yaml
packages/system/kubevirt/templates/kubevirt-cr.yaml (1)

13-15: Approve conditional injection of cpuAllocationRatio
The Helm template correctly includes the cpuAllocationRatio field under developerConfiguration only when .Values.cpuAllocationRatio is set. This aligns with chart best practices and matches your changes in the bundle.
Ignore the YAMLLint warnings here—they’re false positives caused by Helm templating directives.
[ approve_code_changes ] [ skip ]

🧰 Tools
🪛 YAMLlint (1.35.1)

[warning] 14-14: wrong indentation: expected 4 but found 6

(indentation)

[error] 13-13: syntax error: expected the node content, but found '-'

(syntax)

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kvaps
Andrei Kvapil (kvaps) approved these changes Apr 29, 2025
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@kvaps Andrei Kvapil (kvaps) left a comment

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LGTM

@lllamnyp
Timofei Larkin (lllamnyp) deleted the feat/configurable-cpu-allocation-ratio branch April 30, 2025 06:53
Timofei Larkin (lllamnyp) added a commit that referenced this pull request May 20, 2025
@lllamnyp
Make kubevirt's CPU allocation ratio configurable (#905)
627d9f1 
Kubevirt's default cpu-to-vcpu ration is 1:10, which might be a bit
extreme for some users. This patch introduces a new key in the Cozystack
configmap, "cpu-allocation-ratio" where admins of Cozystack can specify
an alternative value, if needed.

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **New Features**
- Added support for optionally configuring a CPU allocation ratio for
KubeVirt deployments when the relevant setting is provided.
- **Chores**
- Improved configuration flexibility for KubeVirt by allowing dynamic
injection of CPU allocation settings.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

(cherry picked from commit c482289)
Signed-off-by: Timofei Larkin <lllamnyp@gmail.com>
@lllamnyp Timofei Larkin (lllamnyp) mentioned this pull request May 20, 2025
Closed
This was referenced May 28, 2025
Merged
Merged
@NickVolynkin Nick Volynkin (NickVolynkin) mentioned this pull request Jun 24, 2025
Closed
Nick Volynkin (NickVolynkin) added a commit to cozystack/website that referenced this pull request Jun 25, 2025
@NickVolynkin
[docs] Add reference for cpu-allocation-ratio
9f3394d 
Update for cozystack/cozystack#905

Signed-off-by: Nick Volynkin <nick.volynkin@gmail.com>
@NickVolynkin Nick Volynkin (NickVolynkin) mentioned this pull request Jun 25, 2025
Merged
Nick Volynkin (NickVolynkin) added a commit to cozystack/website that referenced this pull request Jun 25, 2025
@NickVolynkin
[docs] Add reference for cpu-allocation-ratio
8412e17 
Update for cozystack/cozystack#905

Signed-off-by: Nick Volynkin <nick.volynkin@gmail.com>
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@kvaps Andrei Kvapil (kvaps) kvaps approved these changes
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@klinch0 klinch0 klinch0 approved these changes
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