[Linux-cluster] redhat cluster and resource agent

[gilberto migliavacca]

Thanks for helping me.
now the configuration seems ok;
but I have another problem, I'll open a new thred

gilberto



Rafael Micó Miranda wrote:
> Hi Gilberto,
> 
> What you need to specify where to run each service is the Failover
> Domain of each service.
> 
> Some info:
> 
> http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5.4/html/Cluster_Administration/s1-config-failover-domain-CA.html
> http://sources.redhat.com/cluster/wiki/FailoverDomains
> 
> You have 4 different services, so I would use 2 or 4 different Failover
> Domains to achieve your objective, depending on the availability of
> running each of your services in your cluster nodes.
> 
> First you will need to define de Failover Domains:
> 
> Failover Domain X
> Restricted domain: yes
> Ordered: yes
> Node A - Priority 1
> Node B - Priority 2
> 
> And so on.
> 
> Then you'll need to set the Failover Domain for each of the services,
> for example:
> Service 1 -> FailoverDomain1
> Service 2 -> FailoverDomain2
> Service 3 -> FailoverDomain3
> Service 4 -> FailoverDomain4
> 
> This can be all done with system-config-cluster, but using a resource
> made by yourself into cluster.conf will give you some errors.
> 
> It should be similar to this:
> 
> <rm>
> 	<failoverdomains>
> 		<failoverdomain name="failoverdomain1" ordered="1"
> restricted="1"><failoverdomainnode name="ulises"
> priority="1"/><failoverdomainnode name="aquiles"
> priority="2"/></failoverdomain>
> 		<failoverdomain name="failoverdomain2" ordered="1"
> restricted="1"><failoverdomainnode name="caligula"
> priority="1"/><failoverdomainnode name="ulises"
> priority="2"/></failoverdomain>
> 	</failoverdomains>
> 	<resources>
> [I think you need your definition of your myapp resources here]
> 	<myapp name="res11" myapp_home="/opt/myapp_11" shutdown_wait="0"/>
> [...and so on]
> 	</resources>
> [and then start the definition of your services]
> 	<service autostart="0" exclusive="0" name="srv11">
>              <myapp ref="res11"/>
> 	</service>
> [... and so on]
> </rm>
> 
> Another question is: is your script usable by CMAN?
> 
> I hope this helps. Cheers,
> 
> Rafael
> 
> El lun, 07-12-2009 a las 18:41 +0100, gilberto migliavacca escribió:
>> Hi
>>
>> I'm a newbie in the red hat cluster configuration and
>> I don't know if this is the right mailing list for my
>> question.
>>
>> I have to use my own resource agent script and I have
>> to say to the cluster that the related service must be
>> run just on single server.
>>
>> I other words I want to drive 2 nodes with 4 instances
>> of the same application (2 instances per node).
>>
>> the infostructure is somehting like:
>>
>> node_1
>> /opt/myapp_11/bin/myapp.sh
>> /opt/myapp_12/bin/myapp.sh
>> node_2
>> /opt/myapp_21/bin/myapp.sh
>> /opt/myapp_22/bin/myapp.sh
>>
>>
>> My idea is to create 4 services in the /etc/cluster/cluster.conf
>> but I don't know how to related the service with a
>> given machine and a related path on the given machine
>>
>>
>> for my understanding I think I cannot use the Conga GUI (neither
>> the system-config-cluster) and I have to edit manually the
>> /etc/cluster/cluster.conf
>>
>> could anyone help to write the XML section in the <rm> tag?
>>
>> something like
>>
>> <rm>
>>      <service autostart="0" exclusive="0" name="srv11">
>>              <myapp name="res11"
>>                    myapp_home="/opt/myapp_11"
>>                    shutdown_wait="0"/>
>>      </service>
>>      <service autostart="0" exclusive="0" name="srv12">
>>              <myapp name="res12"
>>                    myapp_home="/opt/myapp_12"
>>                    shutdown_wait="0"/>
>>      </service>
>>      <service autostart="0" exclusive="0" name="srv21">
>>              <myapp name="res21"
>>                    myapp_home="/opt/myapp_21"
>>                    shutdown_wait="0"/>
>>      </service>
>>      <service autostart="0" exclusive="0" name="srv22">
>>              <myapp name="res22"
>>                    myapp_home="/opt/myapp_22"
>>                    shutdown_wait="0"/>
>>      </service>
>> </rm>
>>
>>
>> As you can see I don't know how to specify the node
>>
>> thanks in advance
>>
>> gilberto
>>
>> --
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