Fix operations on automatic clusters

[wenxuan0923]

…sters that have hosted system components enabled.
Automatic cluster with hosted system components enabled may have empty agentpool profiles. Fix the related code for update/upgrade operations.

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[yonzhan]

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[Copilot]

Pull Request Overview

This PR fixes a NoneType error that occurs when performing operations on automatic AKS clusters with hosted system components enabled. These clusters may not have agent pool profiles, so the code needs to handle None or empty agent_pool_profiles gracefully.

Key changes:

• Added defensive checks for empty/None agent_pool_profiles across multiple functions
• Moved validation logic to execute only when operations actually require agent pool profiles
• Added a new update_agentpool_profile method with special handling for automatic clusters

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
setup.py	Bumped version to 19.0.0b10
HISTORY.rst	Added release notes for version 19.0.0b10
managed_cluster_decorator.py	Added update_agentpool_profile method and moved validation checks to be conditional
custom.py	Added defensive checks and guards for empty agent_pool_profiles in multiple functions

Comments suppressed due to low confidence (1)

src/aks-preview/azext_aks_preview/custom.py:1575

• The len() call will fail with a TypeError if instance.agent_pool_profiles is None. This check should use (instance.agent_pool_profiles or []) like the iteration on line 1581, or validate that agent_pool_profiles is not None before calling len().

    if len(instance.agent_pool_profiles) > 1 and nodepool_name == "":

[zhoxing-ms]

Could you add some test cases for this PR change?

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[wenxuan0923]

@zhoxing-ms yes I have added unit tests for the change, thank you!

[azclibot]

[Release] Update index.json for extension [ aks-preview-19.0.0b15 ] : https://dev.azure.com/msazure/One/_build/results?buildId=143195860&view=results