Azure: make it possible to boot without initrd

[Marcelo Cerri]

SRU Justification:

Impact: currently it's not possible to boot Azure instances without an initrd. The flexibility of booting an instance without an initrd is important to reduce boot time.

Fix: Make the modules hv_vmbus and hv_storvsc built-in in the Azure kernel.

Testcase:
- Edit the grub.cfg file and remove the initrd entry.
- Change the root= parameter to use the partition path instead of the partion UUID (the initramfs is usually responsible for fetching those information about disks and partitions).
- If necessary, add rootfstype=ext4 to the kernel parameters.
- After rebooting the system should be available.

NOTE: This report is to track changes made to the azure custom kernel which cannot be correctly represented in launchpad.

[Marcelo Cerri (mhcerri)]

https://lists.ubuntu.com/archives/kernel-team/2017-May/084064.html

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1690136

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Marcelo Cerri (mhcerri)]

https://lists.ubuntu.com/archives/kernel-team/2017-August/086324.html
https://lists.ubuntu.com/archives/kernel-team/2017-August/086324.html