feat(aks-preview): add cluster FIPS flag

[ttruongatl]

---

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

Related command

az aks create
az aks update

General Guidelines

• Have you run azdev style aks-preview locally? (pip install azdev required)
• Have you run python scripts/ci/test_index.py -q locally? (pip install wheel==0.30.0 required)
• My extension version conforms to the Extension version schema

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• My extension description/summary conforms to the Extension Summary Guidelines.

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Summary

Adds preview --enable-fips support for az aks create and az aks update, including Kubernetes version validation, node pool FIPS enforcement, help text, and tests. This intentionally avoids manually bumping the generated AKS SDK/API version; enableFIPS is sent through the existing model extra REST-property path until the SDK is regenerated.

Tests

• PYTHONPATH=src/aks-preview python -m pytest src/aks-preview/azext_aks_preview/tests/latest/test_managed_cluster_decorator.py::AKSPreviewManagedClusterContextTestCase::test_get_enable_fips src/aks-preview/azext_aks_preview/tests/latest/test_managed_cluster_decorator.py::AKSPreviewManagedClusterCreateDecoratorTestCase::test_set_up_enable_fips src/aks-preview/azext_aks_preview/tests/latest/test_managed_cluster_decorator.py::AKSPreviewManagedClusterUpdateDecoratorTestCase::test_update_enable_fips -q
• python -m pytest src/aks-preview/azext_aks_preview/tests/latest/test_managed_cluster_decorator.py -q -k 'enable_fips or get_kubernetes_version'
• PYTHONPATH=src/aks-preview python -m pytest src/aks-preview/azext_aks_preview/tests/latest/test_aks_commands.py::AzureKubernetesServiceScenarioTest::test_aks_create_with_cluster_fips src/aks-preview/azext_aks_preview/tests/latest/test_aks_commands.py::AzureKubernetesServiceScenarioTest::test_aks_update_with_cluster_fips -q (live-only tests collected/skipped locally)
• PYTHONPATH=src/aks-preview python -m compileall -q src/aks-preview/azext_aks_preview
• git diff --check

[azure-client-tools-bot-prd]

Validation for Breaking Change Starting...

Thanks for your contribution!

[azure-client-tools-bot-prd]

Hi @ttruongatl,
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.

[yonzhan]

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

[github-actions]

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[github-actions]

• For more info about extension versioning, please refer to Extension version schema

[Copilot]

Pull request overview

Adds a new preview flag --enable-fips to the aks-preview extension to enable cluster-wide FIPS mode for az aks create and az aks update, including CLI parameter wiring, help text, request shaping in managed cluster decorators, and unit/live-only tests.

Changes:

• Introduces --enable-fips (preview) for az aks create and az aks update and wires it through params + custom command signatures.
• Implements cluster-level FIPS handling in managed cluster create/update decorators, including Kubernetes version gating (1.34+) and node pool enforcement behavior.
• Adds unit tests for context/decorator behavior and live-only scenario tests for create/update.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/aks-preview/HISTORY.rst	Documents the new preview flag and its requirements.
src/aks-preview/azext_aks_preview/managed_cluster_decorator.py	Adds context getter/validation and create/update decorator logic to set cluster/nodepool FIPS flags.
src/aks-preview/azext_aks_preview/custom.py	Extends aks_create/aks_update signatures to accept enable_fips and pass through raw parameters.
src/aks-preview/azext_aks_preview/_params.py	Registers --enable-fips as a preview argument for create/update.
src/aks-preview/azext_aks_preview/_help.py	Adds help entries describing cluster-level FIPS behavior and constraints.
src/aks-preview/azext_aks_preview/tests/latest/test_managed_cluster_decorator.py	Adds unit tests for context + decorator create/update behavior for cluster FIPS.
src/aks-preview/azext_aks_preview/tests/latest/test_aks_commands.py	Adds live-only scenario tests for create/update with cluster-level FIPS.