[lustre-discuss] Can't get zfs OST to mount on a freshly built server

[Bob Ball]

There were no answers to this, from anyone, so it appears this is not 
solved?

So, I proceeded to follow the directions here
https://wiki.hpdd.intel.com/pages/viewpage.action?pageId=8126821
using the stock redhat 2.6.32-504.16.2 kernel and what appears to be 
Lustre 2.7.52 sources.  Some mods to this were needed, but I built the 
kernel, and then successfully built Lustre rpms including the zfs and 
spl modules for version 0.6.4.

BUT, when I boot the kernel following the directions to create the 
initramfs, problems.  The /boot/grub/grub.conf is clearly read, I can 
choose between the stock kernel and the lustre kernel, but when it 
leaves the grub prompts.... nothing.  The console just sits without 
echoing any of the bootup sequence, with only an underscore occasionally 
flashing.  I am left with no choice but to reboot back to the stock kernel.

The volumes with the exception of /boot are all lvm, and the 
/var/log/dracut.log indicates that lvm is included in the initramfs 
image, but the lvm volumes just don't seem to be accessed, just /boot 
that is ext4.  I am at a loss about what to do next, and would really 
appreciate some advice from someone about what to do here.

Many thanks,
bob


On 5/13/2015 10:16 AM, Bob Ball wrote:
> OK, so, I am seeing EXACTLY the issue reported at the end of LU-6452 8 
> minutes after it was closed by Andreas Dilger.
> https://jira.hpdd.intel.com/browse/LU-6452
>
> There is no response.  Is there a solution?
>
> This is Lustre 2.7.0 with (now) zfs 0.6.4.1-1, which was current when 
> the server was built.  I see a number of recent Emails about updates 
> to Lustre sources against this zfs version, but is there a solution 
> for the standard set of 2.7.0 Lustre rpms?  Or any solution that will 
> get me un-stuck?
>
> [root at umdist01 ~]# cat /etc/redhat-release
> Scientific Linux release 6.6 (Carbon)
> [root at umdist01 ~]# uname -r
> 2.6.32-504.8.1.el6_lustre.x86_64
>
> I note that my first OSS server, initially built in March against zfs 
> 0.6.3-1, seems to be happy and definitely does not exhibit this 
> issue.  That server has now also updated to 0.6.4.1, and I am loathe 
> to reboot it now (up for 40 days) for fear of losing access to all of 
> its stored files.  Perhaps I should downgrade to the earlier zfs and 
> cut off automatic zfs updates from that repo?
>
> Thanks,
> bob
>
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