[Linux-cluster] configuring bladecenter fence device

[Parvez Shaikh]

Hi Ben

Thanks a ton for below information. But I have doubt on cluster.conf
file snippet below -

               <clusternode name="node1" votes="1">
                       <fence>
                               <method name="1">
                                       <device blade="2" name="chassis_fence"/>
                               </method>
                       </fence>
               </clusternode>

Here for "node1" device blade is "2". Does it mean node1 is blade[2]
from AMM perspective? So in order to fence out node1 fence_bladecenter
would turn off blade[2]?

Thanks

On Thu, Jan 6, 2011 at 9:36 PM, Ben Turner <bturner at redhat.com> wrote:
> To address:
>
> As per my understanding, IP address is IP address of management module
> of IBM blade center, login/password represent credentials to access
> the same.
>
>>> Correct.
>
> However did not get the parameter 'Blade'. How does it play role in
> fencing?
>
>>> If I recall correctly the blade= is the identifier used to identify the blade in the AMM.  I can't remember if it is a number of a slot or a user defined name.  It corresponds to
>
> # fence_bladecenter -h
>
>   -n, --plug=<id>                Physical plug number on device or
>                                        name of virtual machine
> If the fencing code:
>
>        "port" : {
>                "getopt" : "n:",
>                "longopt" : "plug",
>                "help" : "-n, --plug=<id>                Physical plug number on device or\n" +
>                "                                        name of virtual machine",
>                "required" : "1",
>                "shortdesc" : "Physical plug number or name of virtual machine",
>                "order" : 1 },
>
> To test this try running:
>
> /sbin/fence_bladecenter -a <ip or hostname of bladecenter> -l <login> -p <passwd> -n <blade number of the blade you want to fence> -o status -v
>
> An example cluster.conf looks like:
>
>                <clusternode name="node1" votes="1">
>                        <fence>
>                                <method name="1">
>                                        <device blade="2" name="chassis_fence"/>
>                                </method>
>                        </fence>
>                </clusternode>
>                <clusternode name="node2" votes="1">
>                        <fence>
>                                <method name="1">
>                                        <device blade="3" name="chassis_fence"/>
>                                </method>
>                        </fence>
>
>       <fencedevices>
>                <fencedevice agent="fence_bladecenter" ipaddr="XXX.XXX.1.143" login="rchs_fence" name="chassis_fence"
> passwd="XXXXXXX"/>
>        </fencedevices>
>
> -Ben
>
>
>
>
> ----- Original Message -----
>> Hi all,
>>
>> >From RHCS documentation, I could see that bladecenter is one of the
>> fence devices -
>> http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/Cluster_Administration/ap-fence-device-param-CA.html
>>
>> Table B.9. IBM Blade Center
>> Field Description
>> Name A name for the IBM BladeCenter device connected to the cluster.
>> IP Address The IP address assigned to the device.
>> Login The login name used to access the device.
>> Password The password used to authenticate the connection to the
>> device.
>> Password Script (optional) The script that supplies a password for
>> access to the fence device. Using this supersedes the Password
>> parameter.
>> Blade The blade of the device.
>> Use SSH (Rhel 5.4 and later) Indicates that system will use SSH to
>> access the device.
>>
>> As per my understanding, IP address is IP address of management module
>> of IBM blade center, login/password represent credentials to access
>> the same.
>>
>> However did not get the parameter 'Blade'. How does it play role in
>> fencing?
>>
>> In a situation where there are two blades - Blade-1 and Blade-2 and
>> if Blade-1 goes down(hardware node failure), Blade-2 should fence out
>> Blade-1, in that situation fenced on Blade-2 should power off(?)
>> blade-2 using fence_bladecenter, so how should below sniplet of
>> cluster.conf file should look like? -
>>
>>
>> <clusternodes>
>> <clusternode name="blade1" nodeid="1" votes="1">
>> <fence>
>> <method name="1">
>> <device blade="?????"
>> name="BLADECENTER"/>
>> </method>
>> </fence>
>> </clusternode>
>> <clusternode name="blade2" nodeid="2" votes="1">
>> <fence>
>> <method name="1">
>> <device blade="????"
>> name="BLADECENTER"/>
>> </method>
>> </fence>
>> </clusternode>
>> </clusternodes>
>>
>> In which situation fence_bladecenter would be used to power on the
>> blade?
>>
>> Your gratefully
>>
>> --
>> Linux-cluster mailing list
>> Linux-cluster at redhat.com
>> https://www.redhat.com/mailman/listinfo/linux-cluster
>
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