maas grub issue

[Andres Rodriguez]

Hi Daniel,

While I do not know yet what exactly the issue you are facing is, it sounds
like a problem in hardware configuration. In some situations, you need to
make sure your machine is correctly configured in MAAS in order to be
usable. While MAAS does a pretty good job on automatically discovering
information  and making some initial config, there may be corner cases
where the hardware itself (BIOS config) prevent MAAS from working without
doing some configuration.

In this case, it sounds like the BIOS may be configured to boot of from a
different disk than the one MAAS is installing the MBR/GTP on. If that's
the case, you could do one of two things:

   1. You can either configure the machine in MAAS, and change the 'Boot'
   flag to the disk that's the actual boot disk in the BIOS.
   2. Or you can configure your BIOS correctly to make sure the disk that
   maps to /dev/sde is the boot disk.

I'll ask for some more information on the bug report and we can follow the
conversation there if so you wish.

Thanks.

https://bugs.launchpad.net/maas/+bug/1631083

On Thu, Oct 6, 2016 at 11:18 AM, Daniel Bidwell <drbidwell at gmail.com> wrote:

> I have a maas-1.9.4 with servers with 4 2T disks for data storage and a
> 120GB disk on an onboard controller for the system disk.  Maas is
> deploying ubuntu 16.04 on the servers.  Ubuntu 16.04 labels the 120GB
> system disk as /dev/sde, not /dev/sda.  In maas I can define the
> /sdev/sde disk as the system disk.
>
> juju bootstrap deploys the system and installs the OS on /dev/sde1 but
> fails to write the grub record to /dev/sde and leaves the disk
> unbootable.  The system fails over to booting from an ephemeral iscsi
> file system where I can examine the state of the machine.
>
> The disk is formated with a GPT partition table which grub will not
> write to unless I manually create a small partition as partition 1 with
> blocks from 34-2047 and the system partition as partition 2.
>
> This manual step really not acceptable for deploying from juju and
> maas.
>
> How do I get maas to deploy the system in a way that it will boot
> without manual editing?
> --
> Daniel Bidwell <drbidwell at gmail.com>
>
>
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-- 
Andres Rodriguez
Engineering Manager, MAAS
Canonical USA, Inc.
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