Command Update-AzVM

Question

Hi,
could not find really any information about command Update-AzVM. Can someone explain what is that command used for and where or why should it be used? SYNOPSIS: "Updates the state of an Azure virtual machine." but that do not say anything to me.

https://learn.microsoft.com/fi-fi/powershell/module/az.compute/update-azvm?view=azps-5.6.0

Answer 1

Based on my search in the internet it looks like there are some modifications/changes that require an Update-AzVM. I haven't verified that by myself if an Update-AzVM is really required in this cases.

Changing the encryption of a VM's disk:
https://www.c-sharpcorner.com/blogs/azure-vm-failed-to-update-virtual-machine-disks-solved

Disable the BootDiagnostic status of a VM:
https://yungchou.wordpress.com/2020/05/28/disabling-enabling-azure-vm-bootdiagnostic-using-powershell/

I can't figure out what happens exactly behind the scenes if the cmdlet Update-AzVM is used.

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(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)

Regards
Andreas Baumgarten

Answer 2

Hi @bombbe ,

the Update-AzVM cmlet could be used to update an existing VM after modifications of the VM config.
An example is here:
https://learn.microsoft.com/en-us/azure/virtual-machines/windows/tutorial-manage-vm#resize-a-vm

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(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)

Regards
Andreas Baumgarten