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{Compute} az vmss scale: Migrate command to aaz-based implementation#32795

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william051200 wants to merge 6 commits intoAzure:devfrom
william051200:vmss-scale-migration
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{Compute} az vmss scale: Migrate command to aaz-based implementation#32795
william051200 wants to merge 6 commits intoAzure:devfrom
william051200:vmss-scale-migration

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Related command

az vmss scale

Description

Migration from mgmt.compute to aaz-based

Testing Guide

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Copilot AI review requested due to automatic review settings February 13, 2026 08:13
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azure-client-tools-bot-prd bot commented Feb 13, 2026

️✔️AzureCLI-BreakingChangeTest
️✔️Non Breaking Changes

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yonzhan commented Feb 13, 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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Pull request overview

Migrates the az vmss scale command from the legacy azure.mgmt.compute SDK implementation to an AAZ-based implementation, and adjusts command registration to point to the new custom handler.

Changes:

  • Reimplemented scale_vmss to use operations.vmss.VMSSShow + VMSSCreate (AAZ) instead of virtual_machine_scale_sets.get + begin_create_or_update (SDK).
  • Moved vmss scale command registration to the with self.command_group('vmss') block (and removed it from the SDK-based vmss command group).

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File Description
src/azure-cli/azure/cli/command_modules/vm/custom.py Replaces SDK-based VMSS scale logic with AAZ Show + Create flow and capacity update.
src/azure-cli/azure/cli/command_modules/vm/commands.py Re-registers vmss scale to use the custom command entry aligned with the migration.

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vmss['sku']['capacity'] = new_capacity
vmss['no_wait'] = no_wait

VMSSCreate(cli_ctx=cmd.cli_ctx)(command_args=vmss)
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scale_vmss doesn’t return the result/poller from VMSSCreate(...). This changes the command behavior (no output) and will break existing tests that assert on vmss scale output (e.g., extendedLocation). Return the result of VMSSCreate(...) (and/or the LRO poller when --no-wait is used), consistent with update_vmss which returns VMSSCreate(...).

Suggested change
VMSSCreate(cli_ctx=cmd.cli_ctx)(command_args=vmss)
return VMSSCreate(cli_ctx=cmd.cli_ctx)(command_args=vmss)

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Comment on lines +4496 to +4502
from .operations.vmss import VMSSCreate, VMSSShow, convert_show_result_to_snake_case
vmss = VMSSShow(cli_ctx=cmd.cli_ctx)(command_args={
'resource_group': resource_group_name,
'vm_scale_set_name': vm_scale_set_name
})
vmss = convert_show_result_to_snake_case(vmss)

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VMSSCreate requires resource_group and vm_scale_set_name arguments (see aaz latest vmss Create args schema). The dict produced by convert_show_result_to_snake_case(vmss) doesn’t include these keys, so this call will fail with missing required arguments. Please add resource_group=resource_group_name and vm_scale_set_name=vm_scale_set_name to the command_args passed to VMSSCreate (either by setting them on vmss or by constructing a new args dict).

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