[RULE] Deploy VMSS across availability zones with VMSS Flex

[jeanchg]

Existing rule

No response

Suggested rule

As per APRL recommendation, when creating VMSS, implement availability zones as a protection measure for your applications and data against the rare event of datacenter failure.

Resource Type microsoft.compute/virtualmachinescalesets Property with expected value _arraylength(zones) > 1

Pillar

Reliability

Additional context

Reliability Hub Create a Virtual Machine Scale Set that uses Availability Zones Update scale set to add availability zones

[jeanchg]

This rule will be used to test against the AVM Bicep VMSS module. @rahalan

[BernieWhite]

@jeanchg The documentation is unclear on the point of flexible vs uniform in your title.

Are we saying this is only a recommendation if the orchestration mode is Flexible?

[BenjaminEngeset]

I can create the rule, but awaiting for alignment before constructing the rule body.

[jeanchg]

checking with @rahalan , will update shortly

[BenjaminEngeset]

Any update @jeanchg?

[rahalan]

@BernieWhite @BenjaminEngeset @jeanchg I see no reason, why this should only apply for flexible. I would suggest to recommend it for uniform as well.