[lustre-discuss] Problems setting up lustre 2.8

[Christopher J. Morrone]

On 09/13/2016 07:38 AM, Phill Harvey-Smith wrote:
> On 13/09/2016 14:59, Crowe, Tom wrote:
>> Your mkfs.lustre will look something like this:
>>
>> mkfs.lustre ‹ost --mgsnode=NID_OF_MGS --fsname=FS_NAME
>> --index=DECIMAL_NUM
>> ‹backfstype=zfs --network=NET_TYPE testpool/ost-name-here
>>
>> The last argument, is the zfs vdev device you want mkfs.lustre to create
>> for you.
> 
> Right getting a bit further now,
> 
> [root at oric x86_64]# mkfs.lustre --fsname=test --mgs --mdt --index=0
> --backfstype=zfs testpool/mgt_test
> 
>    Permanent disk data:
> Target:     test:MDT0000
> Index:      0
> Lustre FS:  test
> Mount type: zfs
> Flags:      0x65
>               (MDT MGS first_time update )
> Persistent mount opts:
> Parameters:
> 
> mkfs_cmd = zfs create -o canmount=off -o xattr=sa testpool/mgt_test
> Writing testpool/mgt_test properties
>   lustre:version=1
>   lustre:flags=101
>   lustre:index=0
>   lustre:fsname=test
>   lustre:svname=test:MDT0000
> 
> So it looks like the MDT/MGS is being created on the zfs pool, however
> step 3 says to try and mount this, but I get :
> 
> [root at oric x86_64]# mount -t lustre testpool/mgt_test /mgt_mds
> mount.lustre: mount testpool/mgt_test at /mgt_mds failed: No such device
> Are the lustre modules loaded?
> Check /etc/modprobe.conf and /proc/filesystems
> 
> Yes the modules are loaded, and lustre appears in /proc/filesystems.

Some suggestions:

Run "dmesg" and see what errors were reported.

Run "zfs list" to see what zfs datasets are actually created.

Chris