[Linux-cluster] Two node NFS cluster serving multiple networks

[Randy Brown]

FYI -   everything worked as I expected.  I put a second interface in 
each host and configured it for another network.  Then, I configured the 
resources for this 2nd network and created a separate service 
specifically for the resources on this network.  So I have a service for 
nfs exports to our 91.0 network and another for exports to our 20.0 
network.  Using different nfs client resources, I can mount rw on one 
network and ro on the other, for example.  I figured it would work this 
way, but I hadn't tested it yet.  I must admit I sweating a bit until I 
actually saw it work.

Thanks,

Randy

Brian Kroth wrote:
> OK, poorly thought out example.
>
> FYI, in heartbeat you can specify which interface to use for the
> service IP, though like rgmanager, you generally don't have to:
>
> http://www.linux-ha.org/HeartbeatResourceAgent/IPaddr2
> http://www.linux-ha.org/v2/Examples/Simple
>
> Alex Kompel <barbos at gmail.com> 2008-03-12 10:39:
>   
>> You will still need some way to tell the system through which
>> interface you want to route outgoing packets for each target.
>> You can achieve the same with greater ease by splitting the network in
>>  2 subnets and assigning each to a single interface.
>> It all depends on the problem you are trying to solve. If you want
>> redundancy - use active-passive bonding, you want throughput - use
>> active-active bonding (if your switch supports link aggregation), if
>> you want security and isolation - use separate subnets.
>>
>> -Alex
>>
>> 2008/3/12 Brian Kroth <bpkroth at wisc.edu>:
>>     
>>> This is a hypothetical, but what if you have two interfaces on the same
>>>  network and want to force one service IP to one interface and the other
>>>  to a different interface?  I think what everyone is wondering is how
>>>  much control one has over the service IP placement.
>>>
>>>  Thanks,
>>>  Brian
>>>
>>>  Finnur Örn Guðmundsson - TM Software <fog at t.is> 2008-03-12 14:36:
>>>
>>>
>>>       
>>>> Hi,
>>>>         
>>>  >
>>>  > I see no reason why you could not have 3 diffrent interfaces, each connected to the networks you are trying to serve the NFS requests to/from. RG Manager will add the floating interfaces to the "correct" interface, that is, if your floating ip is 1.2.3.4 and you have a interface with the IP address 1.2.3.3 he will add the IP to that interface.
>>>  >
>>>  >
>>>  > Bgrds,
>>>  > Finnur
>>>  >
>>>  > -----Original Message-----
>>>  > From: linux-cluster-bounces at redhat.com [mailto:linux-cluster-bounces at redhat.com] On Behalf Of gordan at bobich.net
>>>  > Sent: 12. mars 2008 14:10
>>>  > To: linux clustering
>>>  > Subject: Re: [Linux-cluster] Two node NFS cluster serving multiple networks
>>>  >
>>>  > Sounds very similar to what I'm trying to achieve (see the other thread
>>>  > about binding failover resources to interfaces). I've not seen a response
>>>  > yet, so I'm most curious to see if you'll get any.
>>>  >
>>>  > Gordan
>>>  >
>>>  > On Wed, 12 Mar 2008, Randy Brown wrote:
>>>  >
>>>  > > I am using a two node cluster with Centos 5 with up to date patches.  We have
>>>  > > three different networks to which I would like to serve nfs mounts from this
>>>  > > cluster.  Can this even be done?  I have interfaces available for each
>>>  > > network in each node?
>>>  >
>>>  > --
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