[lustre-discuss] Still having problems Lustre 2.8 Centos 7.2

[Mohr Jr, Richard Frank (Rick Mohr)]

Did you check to make sure there are no firewalls running that could be blocking traffic?

--
Rick Mohr
Senior HPC System Administrator
National Institute for Computational Sciences
http://www.nics.tennessee.edu

> On Sep 27, 2016, at 10:12 AM, Phill Harvey-Smith <p.harvey-smith at warwick.ac.uk> wrote:
> 
> Hi all
> 
> I'm still having problems trying to setup lustr 2.8 on Centos 7.2. I think part of the problem is that the documentation at : http://lustre.org/documentation/ seems to be way out of date, when it comes to setting up lustre with zfs.
> 
> Also chapter 9 of the documentation talks about using lnetctl to setup the lustre network, this doesn't seem to exist / have been installed.
> 
> 
> OK, this is what I have done so far.
> 
> Setup two servers, oric and lynx.
> oric will be the mgs/mgt server
> lynx will be the oss server.
> 
> Both now have the correct versions of zfs and the lustre packages installed.
> 
> both servers have a zfs pool called testpool.
> 
> on the mgs I have tried to create the combined mgs/mdt with :
> 
> mkfs.lustre --reformat --fsname=test --mgs --mdt --index=0 --backfstype=zfs      testpool/mgt_test
> 
> That went without hitch, the docs say to try and mount this, however doing so following the documentation will not allow this to be mounted.
> 
> Tom Crowe, suggested that I needed to edit /etc/ldev.conf I have done that and added the line :
> 
> test-mds1 - test-MDT0000 zfs:testpool/mgt_test
> 
> typing service lustre start seems not to return any errors, and there's also nothing in /var/log/messages that seems to indicate failure.
> 
> Now on to the oss lynx :
> 
> Again zfs / lustre packages installed and testpool setup.
> 
> I have tried to make the oss with :
> 
> mkfs.lustre --reformat --ost --fsname=test --mgsnode=137.205.xxx.xxx --index=0 --backfstype=zfs    testpool/test_ost
> 
> Again it returned without an error :
> 
>   Permanent disk data:
> Target:     test:OST0000
> Index:      0
> Lustre FS:  test
> Mount type: zfs
> Flags:      0x62
>              (OST first_time update )
> Persistent mount opts:
> Parameters: mgsnode=137.205.232.200 at tcp
> 
> mkfs_cmd = zfs create -o canmount=off -o xattr=sa testpool/test_ost
> Writing testpool/test_ost properties
>  lustre:version=1
>  lustre:flags=98
>  lustre:index=0
>  lustre:fsname=test
>  lustre:svname=test:OST0000
>  lustre:mgsnode=137.205.232.200 at tcp
> 
> Again /etc/ldev.conf modified and added :
> 
> test test test-OST0000 zfs:testpool/test_ost
> 
> This should have completed the setup however I can't mount the filesystem from a client machine :
> 
> mount -t lustre 137.205.232.179 at tcp0:/test /mnt
> mount.lustre: mount 137.205.232.179 at tcp0:/test at /mnt failed: Input/output error
> Is the MGS running?
> 
> Can anyone help.
> 
> Alternately is there a simple walkthrough of setting lustre up with zfs that I can try to get things going.
> 
> Cheers.
> 
> Phill.
> 
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