nfs mount locally exported directories in a Red HAt Cluster (v3)?

[evdhn at advalvas.be]

>>>>In a Red Hat HA Cluster (v3), how can you nfs mount a directory
>>>> exported
>>>>by a cluster service that is currently local to the cluster member?
>>>>I keep getting permission denied errors.  It works fine when I move the
>>>>cluster service to the other cluster member.  The firewall has been
>>>>stoppped, just to make sure it wasn't part of the problem.
>>>
>>>Make sure you have portmapper and nfslock running on both the client and
>>>server.  That's the most common problem.
>>>----------------------------------------------------------------------
>>>- Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
>>>----------------------------------------------------------------------
>>
>> Thanks for your answer Rick, but apparently I explained poorly.
>>
>> This is a two-member cluster with hostnames arneb and nihal and services
>> lepusbb and lepustl.
>> When service lepusbb runs on arneb, I cannot nfs mount its device on
>> arneb
>> using the service name.  I.e.
>> # mount -t nfs lepusbb:/usr/local/lepus-bb /usr/local/bb
>> does not work on arneb, but it does work on nihal.
>> Similarly, I can mount lepustl:/usr/local/lepus-tl on arneb but not on
>> nihal.
>>
>> I meanwhile found that
>> # mount -t nfs arneb:/usr/local/lepus-bb /usr/local/bb
>> does work, so I'm currently using that as a workaround, but obviously,
>> when a failover would occur while the devices are locally mounted, my
>> scripts wil be in trouble.
>>
>> And yes, portmapper and nfslock are running:
>> # ps auxw | egrep -e lock -e portm | grep -v grep
>> rpc       3109  0.0  0.0  1672  608 ?        S    10:36   0:00 portmap
>> root      3314  0.0  0.0     0    0 ?        SW   10:36   0:00 [lockd]
>> root      3453  0.0  0.0  3064 3064 ?        S<L  10:36   0:00
>> /usr/sbin/clulockd
>
> First, are you sure the device is being exported by arneb and that arneb
> is permitted to mount it?  A "showmount -e arneb" will show what's being
> exported and who's allowed to look at it.
>
> I'm not familiar with RH's HA (high availability) structure so I can't
> speak to the details, but generally it's something along those lines.
> ----------------------------------------------------------------------
> - Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
> ----------------------------------------------------------------------

It must be a RH HA thing then.

# showmount -e arneb
Export list for arneb:
/usr/local/lepus-bb                          arneb,nihal
/usr/local/lepus-bb/server                   gienah,albireo,sair,ruchba
/usr/local/lepus-bb/content                  gienah,albireo,sair,ruchba
/usr/local/lepus-bb/sessions                 gienah,albireo,sair,ruchba
/usr/local/lepus-bb/course_image_main_images gienah,albireo,sair,ruchba

Even when I specify that all nodes ("*") should have access, it still
won't work. :-(

emma


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