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

[Michael Watters]

Did you disable SELinux?  One issue I ran into is that lustre file 
systems will not mount when SELinux is on.  Even setting to permissive 
mode is not enough.


On 09/27/2016 10:12 AM, Phill Harvey-Smith 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 http://lustre.org/documentation/ seems to be way out of date, when it 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.
>
> _______________________________________________
> lustre-discuss mailing list
> lustre-discuss at lists.lustre.org
> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org