On Tue, Oct 22, 2013 at 9:41 AM, fosiul alam <expertalert@xxxxxxxxx> 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)
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