How to create the Managed disk VM from Snapshot disk using Azure Portal

by udhayakumar · March 25, 2018

Image reference and managed disk conceptuals.
https://blogs.msdn.microsoft.com/igorpag/2017/03/14/azure-managed-disks-deep-dive-lessons-learned-and-benefits/

I recently gone through process of creating the Managed disk VM from Azure Portal using the existing running VM using snapshot disk.

Nothing is changed from Azure OLD portal process of creating vm .In past where i have to create copy of the disk and Marked the disk as Linux Disk or Windows Disk for creating the vm from ASM portal and it was easy to provision. Now Azure enhancement of ARM resource provider provides the same functionality to create the vm using managed VM using the snapshot disk ( disk is actually the copy of running/working vm os disk copy) from the new Azure portal.

I have below option to use for linux VM creation using managed OS Linux disk since Windows Sysprep generalization mandatory requirement considerations and to avoid the false identity in the windows network environment.

Here I have approached to create the RHEL VM where i can delete the common identities of the os issues and no impact to the existing servers identities which can be done manually like the deleting DNS resolv, similar identity username, ip and hostname. You use the WAAGENT –deprovision process for achieve where you can run the original VM and copy vm parallely without an issue in the network.

Below options works great with RHEL gallery image vm snapshot disk.

Note: In centos gallery image vm you need mandate of providing the IMAGE PLAN information to create the vm according to the current release.

How to create the VM from Snapshot disk from New Azure portal.

Primarily your disk is in managed disk considerations. Please proceed with following creation steps.

1. Create the Original VM snapshot disk from Portal.
Select the Original VM and go to the Disk to Create the snapshot disk as mentioned below.

2. Create the Disk from the created Snapshot disk from Portal using following link.
https://portal.azure.com/#create/Microsoft.ManagedDisk-ARM

3. Go to the “Disks” services from Portal on “Allservices” as mentioned below.

4. Check your disk name created from snapshot services which you followed on step2 process.
5. Then choose the Create VM option from disk services and provide all required for new VM provisioning process.

6. Post successfull creation you run the WAAGENT –DEPROVISION to remove the old identities of original VM and now you have sucessfully completed the vm creation from Azure Portal.