Add a new disk in Virtual Machine Scale Set

Question

Hello,

I have a Virtual Machine Scale Set which has Linux instance running only with the OS disk. This VM was deployed using a Image.

Now, I must added a new Data disk to this instance.

I know it's possible to do it manually in the instance or in the Virtual Machine Scale Set, but I want to know how can I do it in the image, for future instances or in the case of this VM be redeployed. Is it possible to create a image of the currently instance or do I have to generate a new VM from the image, add the new disk and create a new image?

Thank you

Answer 1

Hello @Victor Gomes

Unfortunately you cannot create VM custom image directly from VMSS, but you can use existing custom image that is used by VMSS and modify it.

High Level steps are:

• Create and configure a source VM from VMSS custom image
• Create an Azure Compute Gallery
• Create a specialized image definition
• Create an image version from above VM
• Create a scale set from a specialized image
• Share an image gallery

https://learn.microsoft.com/en-us/azure/virtual-machine-scale-sets/tutorial-use-custom-image-cli

https://learn.microsoft.com/en-us/azure/devtest-labs/devtest-lab-create-custom-image-from-vm-using-portal