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fix: bug that wiped acns perf acceleration mode due to full put#9779

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santhoshmprabhu wants to merge 3 commits intoAzure:mainfrom
santhoshmprabhu:sanprabhu/fix-acns-perf-full-put
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fix: bug that wiped acns perf acceleration mode due to full put#9779
santhoshmprabhu wants to merge 3 commits intoAzure:mainfrom
santhoshmprabhu:sanprabhu/fix-acns-perf-full-put

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This checklist is used to make sure that common guidelines for a pull request are followed.

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az aks update in aks-preview would do a full put on advanced networking profile. The acceleration mode in the profile wasn't being checked in the current MC, so each time the acceleration mode needed to be set again to prevent being wiped out.

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Copilot AI review requested due to automatic review settings April 14, 2026 04:13
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azure-client-tools-bot-prd bot commented Apr 14, 2026

️✔️Azure CLI Extensions Breaking Change Test
️✔️Non Breaking Changes

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Hi @santhoshmprabhu,
Please write the description of changes which can be perceived by customers into HISTORY.rst.
If you want to release a new extension version, please update the version in setup.py as well.

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yonzhan commented Apr 14, 2026

Thank you for your contribution! We will review the pull request and get back to you soon.

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The git hooks are available for azure-cli and azure-cli-extensions repos. They could help you run required checks before creating the PR.

Please sync the latest code with latest dev branch (for azure-cli) or main branch (for azure-cli-extensions).
After that please run the following commands to enable git hooks:

pip install azdev --upgrade
azdev setup -c <your azure-cli repo path> -r <your azure-cli-extensions repo path>

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Hi @santhoshmprabhu

Release Suggestions

Module: aks-preview

  • Please log updates into to src/aks-preview/HISTORY.rst
  • Update VERSION to 20.0.0b2 in src/aks-preview/setup.py

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Pull request overview

Fixes an az aks update behavior in aks-preview where a full PUT on networkProfile.advancedNetworking could unintentionally wipe the existing ACNS performance acceleration mode when the user didn’t re-specify it.

Changes:

  • Updated get_acns_enablement() to return ACNS enablement including performance (4-tuple).
  • Updated ACNS update logic to preserve the existing advanced_networking.performance when performance acceleration mode isn’t explicitly set during updates.

Comment thread src/aks-preview/azext_aks_preview/managed_cluster_decorator.py
Comment thread src/aks-preview/azext_aks_preview/managed_cluster_decorator.py
@@ -851,15 +851,15 @@ def get_enable_cilium_dataplane(self) -> bool:
return bool(self.raw_param.get('enable_cilium_dataplane'))

def get_acns_enablement(self) -> Tuple[
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Please include a unit test case for this change. It's surprising that modifying the function signature and return value structure didn't break any existing cases.

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The two signatures are exactly the same, we're in the process of removing the with_perf function across GA and extensions.

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Updated UTs.

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Queued live test to validate the change.

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6 participants