[Bug 1918265] Re: Random boot failure with Ubuntu 20.04 / grub 2.04 and Hyper-V 2012r2

2021-12-09 Thread Lucas Navarezi
Hello everyone,

apparently Debian 11 (5.10.0-9-amd64) solved these issues.
We currently have some VMs running the OS.
I tested with a cronjob to reboot one vm every 5 minutes and it didn't exhibit 
the 0x1E on event viewer and neither shut itself off.

If anyone can test and confirm this, 
maybe we can compare the differences between kernels, packages etc.

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Title:
  Random boot failure with Ubuntu 20.04 / grub 2.04 and Hyper-V 2012r2

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[Bug 1918265] Re: Random boot failure with Ubuntu 20.04 / grub 2.04 and Hyper-V 2012r2

2021-09-30 Thread Lucas Navarezi
We are currently facing the same problems with Linux Virtual Machines
running Ubuntu 18.04 and 20.04, both LTS releases.

Upon examining the Event Viewer on one of the Hosts machines, there's a
critical error message:

Event ID: 18602
Source: Hyper-V-Worker

 has encountered a fatal error and a memory dump has been
generated. The guest operating system reported that it failed with the
following error code: 0x1E. If the problem persists, contact Product
Support for the guest operating system. (Virtual machine ID -
---)

These are some fixes we have tried so far:
   - Install linux-azure packages and kernel;
   - Enable Secure boot on Guest Machine;
   - Scan the disk for corruption;
   - Try different kernels.

We couldn't try other fixes like Updating the Hyper-V Server to 2019 or
disabling secure boot on Host machines, the reason being that we have
around 200 VMs across 8 Hosts.

Current configuration:
   - 2 Clusters;
   - 4 Hosts per cluster;
   - All hosts are running Hyper-V 2016.

Unfortunately, we are not the only ones with the issue, the bug also
affects Debian and RHEL distros:

https://access.redhat.com/solutions/4796261
https://docs.microsoft.com/en-us/answers/questions/530961/windows-server-2016-hyper-v-boot-error-w-virtual-s.html

These ones are the same:
https://docs.microsoft.com/en-us/answers/questions/52937/failure-to-boot-on-red-hat-enterprise-linux-rhel-o.html
https://social.technet.microsoft.com/Forums/en-US/1da1f987-52f0-4304-84f1-2c0ab52f3586/failure-to-boot-on-red-hat-enterprise-linux-rhel-or-centos-8-using-hyperv-2016?forum=linuxintegrationservices
https://social.technet.microsoft.com/Forums/en-US/3c48c962-a28d-44bb-bd80-5b7a902404d8/failure-to-boot-on-red-hat-enterprise-linux-rhel-or-centos-8-using-hyperv-2016?forum=winserverhyperv
https://www.reddit.com/r/HyperV/comments/hx2cps/failure_to_boot_on_red_hat_enterprise_linux_rhel/

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Title:
  Random boot failure with Ubuntu 20.04 / grub 2.04 and Hyper-V 2012r2

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