[lustre-discuss] MDS Config Help: Are the lustre modules loaded?

[Patrick Farrell]

The kernel version is found with uname -r or cat /proc/version.

That needs to match the kernel version in the Lustre RPMs.  (The version 
string is the 2.6.32-573.12.1.el6_lustre) part.

In fact, it looks like you've got Lustre server RPMs, given the _lustre 
in the name of the kernel.  That means you need to install the 
associated kernel.

- Patrick

On 06/22/2016 01:43 PM, Sangeetha Banavathi Srinivasa wrote:
> Patrick,
>
> The CentOS version on the machines is 6.8
>
> [lustre at hulk2 ~]$ cat /etc/redhat-release
> CentOS release 6.8 (Final)
>
>
> The kernel version that I have installed is what I found along with 
> the lustre RPMs
> [lustre at amaranth3 ~]$ uname -r
> 2.6.32-573.12.1.el6_lustre.x86_64
>
>
> And I am trying to install lustre 2.8.
>
> Should the CentOS release version be 2.7??
>
>
>
>> On Jun 22, 2016, at 2:17 PM, Patrick Farrell <paf at cray.com 
>> <mailto:paf at cray.com>> wrote:
>>
>> Well, it says to check dmesg...  Though that will just list the 
>> symbols.  In general, this usually means you've got a mismatch 
>> between the version of the kernel (or OFED) Lustre is built against 
>> and your version of either the kernel or OFED.  Given the number and 
>> locations of the mismatches, I'm guessing it's the kernel.
>>
>> So, compare your kernel version and your Lustre RPMs.
>>
>> Regards,
>> - Patrick
>> On 06/22/2016 12:47 PM, Sangeetha Banavathi Srinivasa wrote:
>>> When I try modprobe lustre, I see the below errors:
>>> [*05:44:03*] *root at hulk2**lustre #*modprobe lustre
>>> WARNING: Error inserting obdclass 
>>> (/lib/modules/2.6.32-573.12.1.el6_lustre.x86_64/extra/kernel/fs/lustre/obdclass.ko): 
>>> Unknown symbol in module, or unknown parameter (see dmesg)
>>> WARNING: Error inserting ptlrpc 
>>> (/lib/modules/2.6.32-573.12.1.el6_lustre.x86_64/extra/kernel/fs/lustre/ptlrpc.ko): 
>>> Unknown symbol in module, or unknown parameter (see dmesg)
>>> WARNING: Error inserting fld 
>>> (/lib/modules/2.6.32-573.12.1.el6_lustre.x86_64/extra/kernel/fs/lustre/fld.ko): 
>>> Unknown symbol in module, or unknown parameter (see dmesg)
>>> WARNING: Error inserting lmv 
>>> (/lib/modules/2.6.32-573.12.1.el6_lustre.x86_64/extra/kernel/fs/lustre/lmv.ko): 
>>> Unknown symbol in module, or unknown parameter (see dmesg)
>>> WARNING: Error inserting fid 
>>> (/lib/modules/2.6.32-573.12.1.el6_lustre.x86_64/extra/kernel/fs/lustre/fid.ko): 
>>> Unknown symbol in module, or unknown parameter (see dmesg)
>>> WARNING: Error inserting mdc 
>>> (/lib/modules/2.6.32-573.12.1.el6_lustre.x86_64/extra/kernel/fs/lustre/mdc.ko): 
>>> Unknown symbol in module, or unknown parameter (see dmesg)
>>> WARNING: Error inserting lov 
>>> (/lib/modules/2.6.32-573.12.1.el6_lustre.x86_64/extra/kernel/fs/lustre/lov.ko): 
>>> Unknown symbol in module, or unknown parameter (see dmesg)
>>> FATAL: Error inserting lustre 
>>> (/lib/modules/2.6.32-573.12.1.el6_lustre.x86_64/extra/kernel/fs/lustre/lustre.ko): 
>>> Unknown symbol in module, or unknown parameter (see dmesg)
>>>
>>>> On Jun 22, 2016, at 1:44 PM, Sangeetha Banavathi Srinivasa 
>>>> <bsangee at vt.edu <mailto:bsangee at vt.edu>> wrote:
>>>>
>>>> Hi,
>>>>
>>>> Below are the steps I executed in configuring MDS.
>>>>
>>>> 1. mkfs.lustre --fsname lustre --mdt --mgs /dev/vg00/mdt
>>>>
>>>> 2. mkdir /mdt
>>>>
>>>> 3. mount -t lustre /dev/vg00/mdt /mdt
>>>>
>>>> I see the below error after step 3:
>>>>
>>>> mount.lustre: mount /dev/mapper/vg00-mdt1 at /mdt failed: No such 
>>>> device
>>>> Are the lustre modules loaded?
>>>> Check /etc/modprobe.conf and /proc/filesystems
>>>> [root at amaranth3 lustre]#
>>>>
>>>>
>>>> I tried modprobe lustre and retried mounting but it resulted in the 
>>>> same error.  Any help will be appreciated.
>>>>
>>>>
>>>> For your info, the lustre modules that I have installed are:
>>>> [root at amaranth3 lustre]# rpm -qa |grep lustre
>>>> lustre-osd-ldiskfs-mount-2.8.0-2.6.32_573.12.1.el6_lustre.x86_64.x86_64
>>>> lustre-tests-2.8.0-2.6.32_573.12.1.el6_lustre.x86_64.x86_64
>>>> lustre-modules-2.8.0-2.6.32_573.12.1.el6_lustre.x86_64.x86_64
>>>> lustre-osd-ldiskfs-2.8.0-2.6.32_573.12.1.el6_lustre.x86_64.x86_64
>>>> lustre-iokit-2.8.0-2.6.32_573.12.1.el6_lustre.x86_64.x86_64
>>>> kernel-2.6.32-573.12.1.el6_lustre.x86_64
>>>> lustre-2.8.0-2.6.32_573.12.1.el6_lustre.x86_64.x86_64
>>>>
>>>> [root at amaranth3 lustre]# rpm -qa |grep e2fs
>>>> e2fsprogs-libs-1.42.13.wc5-7.el6.x86_64
>>>> e2fsprogs-1.42.13.wc5-7.el6.x86_64
>>>>
>>>> [root at amaranth3 lustre]# rpm -qa |grep libss
>>>> libss-1.42.13.wc5-7.el6.x86_64
>>>>
>>>> root at amaranth3 lustre]# rpm -qa |grep libcom
>>>> libcom_err-1.42.13.wc5-7.el6.x86_64
>>>>
>>>>
>>>> [root at amaranth3 lustre]# uname -a
>>>> Linux amaranth3 2.6.32-573.12.1.el6_lustre.x86_64 #1 SMP Tue Feb 23 
>>>> 22:41:09 PST 2016 x86_64 x86_64 x86_64 GNU/Linux
>>>> [root at amaranth3 lustre]#
>>>>
>>>>
>>>>
>>>> Thanks,
>>>> Sangeetha
>>>
>>>
>>>
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>>
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