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Description of problem:
Azure stores the instance ID with an incorrect byte ordering for the first parts. We have a host update that is causing a byte swap, and if the VM is rebooted after, the customer cannot login into their VM. A fix has been approved. We would like this fix to be patched into the current cloud-init packages for 7 and 8. This only impacts Gen2 hyperV images, but these will be updated with cloud-init end of Jan.

The fix is here:
https://github.com/canonical/cloud-init/pull/84

You cannot reproduce without a gen2 VM running on a host, and have a host update.

Dan, thanks for the heads-up. I will clone this BZ to rhel-8 as well.

We'll need to discuss timing and options. I'll follow-up in email.