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

Sangeetha Banavathi Srinivasa bsangee at vt.edu
Wed Jun 22 12:40:45 PDT 2016 

I have done that already and re-booted my system.
But I still get the error.

When I did run that command, I got the below error:
WARNING: Can't read module /lib/modules/2.6.32-573.12.1.el6_lustre.x86_64/weak-updates/kernel/fs/lustre/llog_test.ko: No such file or directory
egrep: /lib/modules/2.6.32-573.12.1.el6_lustre.x86_64//weak-updates/kernel/fs/lustre/llog_test.ko: No such file or directory


> On Jun 22, 2016, at 3:38 PM, Patrick Farrell <paf at cray.com> wrote:
> 
> Well, that's not patching the kernel.  It's making the initrd and and updating the boot stuff so your system will boot that kernel.
> 
> But, yes, that should be what you need to do.
> 
> - Patrick
> On 06/22/2016 02:36 PM, Sangeetha Banavathi Srinivasa wrote:
>> When you say install the associated kernel do you mean patching the kernel like below
>> sudo /sbin/new-kernel-pkg --package kernel --mkinitrd  --dracut --depmod --install 2.6.32-573.12.1.el6_lustre.x86_64
>> 
>> I have already done rpm -ivh kernel-2.6.32-573.12.1.el6_lustre.x86_64.rpm
>> 
>> 
>>> On Jun 22, 2016, at 2:51 PM, Patrick Farrell <paf at cray.com <mailto:paf at cray.com>> wrote:
>>> 
>>> 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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>>>>>> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org <http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org>
>>>>> 
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>>>> 
>>> 
>> 
> 

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