[Linux-cluster] IP Resource behavior with Red Hat Cluster

[Parvez Shaikh]

Hi Jakov

Thank you for your response. My two hosts have multiple network
interfaces or ethernet cards. I understood from your email, that the
IP corresponding to "cluster node name" for both hosts, should be in
the same subnet before a cluster could bring virtual IP up. I will
reconfirm if these are in same subnets.

Gratefully yours,
Parvez

On Fri, Dec 24, 2010 at 6:16 PM, Jakov Sosic <jakov.sosic at srce.hr> wrote:
> On 12/24/2010 09:41 AM, Parvez Shaikh wrote:
>> Hi Rajagopal,
>>
>> Thank you for your response
>>
>> I have created a cluster configuration by adding IP resource with
>> value 192.168.25.153 (some value) and created a service which just has
>> IP resource part of it. I have set all requisite configuration such
>> two node, node names, failover,fencing etc.
>>
>> Upon trying to start then service(enable service),it failed -
>>
>> clurgmgrd: [31853]: <debug> 192.168.25.135 is not configured
>>
>> Then manually added this IP to host
>>
>> ifconfig eth0:1 192.168.25.135
>>
>> Then service could start but it gave message -
>>
>> clurgmgrd: [31853]: <debug> 192.168.25.135 already configured
>>
>> So do I have to add virtual interface manually (as above or any other
>> method?) before I could start service with IP resource under it?
>
> How is your network configured? For an IP address to work in a cluster,
> you have to have interfaces on both machines set up, which are in the
> same subnet. For example:
>
> node1 # ifconfig eth0 192.168.25.11 netmask 255.255.255.0
> node2 # ifconfig eth0 192.168.25.12 netmask 255.255.255.0
>
> Then and only then will cluster be able to bring up virtual ip address
> and bind it as secondary on this interface. You can then see it with:
>
> # ip addr show
>
>
> I guess you're trying to bring up IP address from network subnet that is
> not in any way set up on your host. And that is a prerequisite with
> classic IP resource.
>
>
>
>
> --
> Jakov Sosic
> www.srce.hr
>
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