How to update a generalized disk in Azure VM

Question

I am facing an issue where I am unable to upgrade the disk size of my generalized VM through the Azure portal. The portal does not show me the update option under the disk section. I have tried using az-cli, but I am encountering permission issues and conflicts where the user does not have the required rights to resize the disk. Can someone provide guidance on how to resize a generalized disk in Azure VM using az-cli?

Additional Information:

• Azure VM is being used.
• The issue is related to disk resizing.
• The desired outcome is to resize the disk on a generalized VM.
• Permission and conflict errors are being encountered when using az-cli.
• Operating system is Ubuntu or application versions were mentioned in the input.
• No documentation or steps taken to resolve the issue were mentioned in the input.

Answer 1

Hello @devidinesh7890@gmail.com

You can use the Azure CLI to resize the disk on a generalized VM. First, you need to deallocate the VM with the command

az vm deallocate --resource-group <resource-group-name> --name <vm-name>.

Then, you can update the disk size with the command

az disk update --resource-group <resource-group-name> --name <disk-name> --size-gb <new-size>.

After that, you can start the VM with the command az vm start --resource-group <resource-group-name> --name <vm-name>.

After that, you can start the VM with the command az vm start --resource-group <resource-group-name> --name <vm-name>.

Ref: https://learn.microsoft.com/en-us/azure/virtual-machines/resize-vm?tabs=cli

https://askubuntu.com/questions/1253516/properly-resize-an-azure-vm-disk

https://learn.microsoft.com/en-us/azure/virtual-machines/linux/expand-disks?tabs=ubuntu

If you are using Ubuntu, you can expand the root partition of the OS disk and filesystems automatically by cloud-init.

To resize an Azure VM disk, you need to have the "Contributor" or "Virtual Machine Contributor" role assigned to your account. If you don't have these roles, you won't be able to resize the disk. Specifically, you need to have the "Microsoft.Compute/disks/write" permission on the disk resource. If you are encountering permission issues, you may need to check your role assignments and ensure that you have the necessary permissions.<sup>

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