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{Compute} Fix vmss extension set bug - #33755

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Julie Zhu (yanzhudd) merged 1 commit into
Azure:devfrom
william051200:fix-set-vmss-extension
Jul 21, 2026
Merged

Julie Zhu (yanzhudd) merged 1 commit into
Azure:devfrom
william051200:fix-set-vmss-extension

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@william051200

@william051200 William (william051200) commented Jul 21, 2026

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Related command

az vmss extension set

Description

Bug: Same type of extension will be parse together in a list causing extension name 'xxx' cannot be used for more than one extension.

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@william051200
William (william051200) requested a review from a team as a code owner July 21, 2026 01:49
Copilot AI review requested due to automatic review settings July 21, 2026 01:49
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Hi William (@william051200),
Since the current milestone time is less than 7 days, this pr will be reviewed in the next milestone.

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Pull request overview

Fixes a bug in the VMSS extension update flow where existing extensions weren’t being properly filtered out, leading to duplicate extensions and the service error extension name 'xxx' cannot be used for more than one extension. This is within the vm command module’s implementation of az vmss extension set.

Changes:

  • Update the extension de-duplication filter to compare against the correct extension field (type) when removing an existing extension before adding the new one.

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Comment on lines 5329 to 5332
extension_profile['extensions'] = \
[x for x in extensions if
x.get('type_properties_type', '').lower() != extension_name.lower() or
x.get('type', '').lower() != extension_name.lower() or
x.get('publisher', '').lower() != publisher.lower()]
@yonzhan

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Compute

@yanzhudd

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/azp run

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4 participants