[Linux-cluster] Working of a two-node cluster
Jatin Davey
jashokda at cisco.com
Fri Apr 24 12:53:16 UTC 2015
Here is my cluster.conf file
************************
<?xml version="1.0"?>
<cluster config_version="4" name="****">
<clusternodes>
<clusternode name="node-103" nodeid="1">
<fence>
<method name="Method01">
<device name="node-103"/>
</method>
</fence>
</clusternode>
<clusternode name="node-105" nodeid="2">
<fence>
<method name="Method02">
<device name="node-105"/>
</method>
</fence>
</clusternode>
</clusternodes>
<cman expected_votes="1" two_node="1"/>
<fencedevices>
<fencedevice agent="fence_ipmilan" auth="password"
ipaddr="x.x.x.x" lanplus="on" login="admin" name="node-103"
passwd="*****" privlvl="ADMINISTRATOR"/>
<fencedevice agent="fence_ipmilan" auth="password"
ipaddr="x.x.x.x" lanplus="on" login="admin" name="node-105"
passwd="******" privlvl="ADMINISTRATOR"/>
</fencedevices>
<fence_daemon post_join_delay="120"/>
<rm>
<resources>
<netfs export="/test" force_unmount="1"
fstype="nfs" host="x.x.x.x" mountpoint="/test/test/test" name="test123"/>
<ip address="x.x.x.x" sleeptime="5"/>
<script file="/xxx/xxx/xxx/xxx/xx.sh"
name="xxxx"/>
</resources>
<failoverdomains>
<failoverdomain name="Failover01"
nofailback="1" ordered="1">
<failoverdomainnode name="node-103"
priority="1"/>
<failoverdomainnode name="node-105"
priority="2"/>
</failoverdomain>
</failoverdomains>
<service domain="Failover01" name="Service01"
recovery="relocate">
<ip ref="x.x.x.x"/>
<netfs ref="test123"/>
<script ref="xxxx"/>
</service>
</rm>
</cluster>
On 4/24/2015 6:01 PM, emmanuel segura wrote:
> please share your cluster config, maybe in this way someone can help you.
>
> 2015-04-24 14:12 GMT+02:00 Jatin Davey <jashokda at cisco.com>:
>> Hi
>>
>> I am using a two node cluster using RHEL 6.5. I have a very fundamental
>> question.
>>
>> For the two node cluster to work , Is it mandatory that both the nodes are
>> "online" and communicating with each other ?
>>
>> What i can see is that if there is communication failure between them then
>> either both the nodes are fenced or the cluster gets into a "stopped" state
>> (Seen from output of clustat command).
>>
>> Apologies if my questions are naive. I am just starting to work with RHEL
>> cluster add-on.
>>
>> Thanks
>> Jatin
>>
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>
>
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