Support ARM64/aarch64

[lareeth]

When enable Azure DevOps to use a VMSS pool configured with an ARM64 image, the deployment fails due to the following error

The current CPU architecture is not supported. Deployment agent requires x64 architecture.

vsts-azurevm-extension/ExtensionHandler/Linux/src/AzureRM.py

Lines 165 to 171 in f1b3ace

	def validate_os():
	os_version = handler_utility.get_os_version()
	if(os_version['IsX64'] != True):
	code = RMExtensionStatus.rm_extension_status['UnSupportedOS']
	message = 'The current CPU architecture is not supported. Deployment agent requires x64 architecture.'
	raise RMExtensionStatus.new_handler_terminating_error(code, message)

What's the reason for the limitation, and are there plans to support ARM64 deployments?

I have also tried replacing the image that gets passed into the deployment

{
...
  "agentDownloadUrl": "https://vstsagentpackage.azureedge.net/agent/3.225.0/vsts-agent-linux-arm64-3.225.0.tar.gz",
...
}

But it appears the extensions throws the error before it tries to run the agent

[timarcher]

This would be extremely useful to have working for my projects as well. Use case is to build arm64 docker images that can be deployed through Azure IoT to Jetsons and raspberry pi's. Having vmss support would ease management of the build server.

[stfnzl]

Yes please, we are really looking forward for this to be fixed!

[MarianSWA]

How is this still being ignored when it's 2024 and ARM is everywhere?? We've been wanting to switch to ADO for more than 2 years now and this is the one single blocker! I expected that after all this time this would already be ready to use but every time I come back to check I am once again disappointed that it's still being ignored.

[stefanegg]

Same here; out-of-the-box support for ARM64 would be highly appreciated

[vinodMS]

+1 on this, can we please get this moving please.

[arcilli]

Any updates on this one?

[lareeth]

I would suggest emailing opensource@microsoft.com with something to the effect of

Dear Microsoft Open Source,

Please can you provide some support in prioritising a feature request for Azure DevOps, this feature request provides support for VMSS pools using ARM64 architecture. This is a important feature especially with Azure's support for ARM64 based instances, and the announcement of Server 2025 supporting ARM64.

Please can you respond to the feature request: 
Issue: https://github.com/microsoft/vsts-azurevm-extension/issues/230
Pull Request: https://github.com/microsoft/vsts-azurevm-extension/pull/232

Regards,

<Name>

[kaiyuanlim]

Hi,

Can we have this fixed?
We are moving our pipeline from Jenkins to AzureDevops and the current workaround to make this work is not that great.

[lareeth]

@LukashevichDanik @tkasparek @simonasaitta Can you explain why this issue, which has a PR to fix it already raised, is being ingored by the team? You just fixed a python issue 3 days ago.

[jgalliers]

@lareeth @kaiyuanlim @MarianSWA I have been participating in a private preview of a new Microsoft-Managed Agent Pool. I'm informed it will enter public preview in a few weeks' time (or thereabouts).

From my experiences thus far it will address most if not all of the current issues around ARM builds on Azure DevOps. Essentially you are able to specify an arbitrary VM SKU to run in your pool, along with the various scaling settings you would see. It's a blend of VMSS customisation with the Azure DevOps Agent onboard.

We have been able to successfully complete ARM-based builds and are very happy with the results. Hopefully you will soon have the ability to verify yourselves.

[stefankaufmann]

It is end of the year now and I just ran into this issue.

Manually creating ARM based VMs and installing the agent just works and I don't understand why this simple fix has not been implemented yet.

Update:
I managed to work around this issue by adding the extension with the fixes from #232 to an image. Now when a vm is created from that image, the modified extension is loaded and everything works find and we can use ARM based Scale Sets as Agent Pools in Azure DevOps

[kaiyuanlim]

Any updates?