[Linux-cluster] Can i use 2 nodes from a cluster?

[fosiul alam]

Hi
Thanks, yes that what i always thought that if i want to use load balance
then i will use hardware firewall + 2/3 hardware server, clustering is not
for load balance. I only used clustering for high availability like MySQL
its only that some one made me confused and i thought i was missing
something so had to make sure.

Thanks
Regards




On 22 October 2013 17:23, Marcelo Roccasalva <roccas at gmail.com> wrote:

> On Tue, Oct 22, 2013 at 9:41 AM, fosiul alam <expertalert at gmail.com>
> wrote:
> > Hi
> >
> > I am trying to build a redhat cluster with 4 nodes for High Availability
> and
> > load balancing.
> >
> > example :
> >
> > node1,node2,node3,node4 for apache service + Centralized Storage.
> >
> > now when those 4 nodes are connecting into cluster, i can only use 1
> node at
> > a time and when 1 node goes down then it shift all services into node2 .
> >
> > but can i not use all 4 nodes a  time ??
> >
> > example, i have a hardware load balancer, From this  can i not pass the
> http
> > trafiq to all 4 nodes ??
> >
> > if not then how can i have load balanced between these 4 nodes ??
>
> You need a failoverdomain nofailback restricted for every node, and a
> service for apache on every node, Untested relevant part of
> cluster.conf:
>
>  <rm>
>                 <resources>
>                         <script file="/etc/init.d/httpd" name="httpd"/>
>                 </resources>
>                 <failoverdomains>
>                         <failoverdomain name="only_node1"
> nofailback="1" restricted="1">
>                                 <failoverdomainnode name="node1"/>
>                         </failoverdomain>
>                         <failoverdomain name="only_node2"
> nofailback="1" restricted="1">
>                                 <failoverdomainnode name="node2"/>
>                         </failoverdomain>
> ...
>                 </failoverdomains>
>                 <service domain="only_node1" name="apache1"
> recovery="restart">
>                         <script ref="httpd"/>
>                 </service>
>                 <service domain="only_node2" name="apache2"
> recovery="restart">
>                         <script ref="httpd"/>
>                 </service>
> ...
> </rm>
>
> Anyway, if you need the same services running in every node, you don't
> need a cluster ;-)
>
> Regards,
>
> --
> Marcelo
>
> ¿No será acaso que esta vida moderna está teniendo más de moderna que de
> vida?" (Mafalda)
>
> --
> Linux-cluster mailing list
> Linux-cluster at redhat.com
> https://www.redhat.com/mailman/listinfo/linux-cluster
>
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