[Linux-cluster] Fencing agents

["Sævaldur Arnar Gunnarsson [Hugsmiðjan]"]

I'm sorry, that was my mistake, the machine does in fact power back up.

Adam Manthei wrote:
> On Thu, Aug 04, 2005 at 11:00:47AM +0000, "Sævaldur Arnar Gunnarsson [Hugsmiðjan]" wrote:
> 
>>Well .. when I manually run the fence_drac.pl perl script and supply it 
>>with the ip of the DRAC (-a 192.168.100.173) login name (-l root) 
>>DRAC/MC module name (-m Server-1) and the password (-p dummypassword) 
>>the machine in question (Server-1) powers down and doesn't power back on.
> 
> 
> Interesting... :(
>  
> 
>>How do I implement this in cluster.xml (specify the ip/login/pass/module 
>>name) 
> 
> 
> Typically, the parameters are suppose to be in the manpage for the agent.
> If they are not, then it should be considered a bug.  I think this will work
> for, but I've not tested the bellow config, so it might not be error free :)
> 
>    <fencedevices>
>       <fencedevice name="dracula"
>          agent="fence_drac" 
>          login="root" 
>          passwd="dummypassword"
>          ipaddr="192.168.100.173" 
>          action="reboot" />
>    </fencedevices>
> 
>    <clusternodes>
>       <clusternode name="servername">
>          <method name="1">
>             <device name="dracula" module="Server-1"/>
>          </method>
>       </clusternode>
>    </clusternodes>
> 
>>and shouldn't it power back up afterwards ?
> 
> 
> The default action is suppose to be "reboot" as in the machine should come
> back online.  I don't know why it isn't.  If you continue to have problems,
> try enabling the debugging output from the command line:
> 
> fence_drac -a 192.168.100.173 -l root -p dummypassword -m Server-1 \
> 	-D /tmp/drac.log -v
> 
> Keep us posted.
> -Adam
> 
> 
>>JACOB_LIBERMAN at Dell.com wrote:
>>
>>>The 1855 has a built in ERA controller. You can modify the fencing agents 
>>>to either send "racadm serveraction powercycle" or install the PERL telent 
>>>module and create your own fencing script. The former option requires that 
>>>the rac management software be installed on the host. I havent tested this 
>>>with the 1855 btw.
>>>
>>>http://sources.redhat.com/cgi-bin/cvsweb.cgi/cluster/fence/agents/drac/?cvsroot=cluster
>>>
>>>The fence_drac agent out on the CVS should work for you. If you cant get 
>>>it working, let me know, and ill see if I can dig up an 1855 in the lab.
>>>
>>>Thanks, jacob
>>>
>>>
>>>
>>>>-----Original Message-----
>>>>From: linux-cluster-bounces at redhat.com 
>>>>[mailto:linux-cluster-bounces at redhat.com] On Behalf Of 
>>>>"Sævaldur Arnar Gunnarsson [Hugsmiðjan]"
>>>>Sent: Wednesday, August 03, 2005 6:59 AM
>>>>To: linux-cluster at redhat.com
>>>>Subject: [Linux-cluster] Fencing agents
>>>>
>>>>I'm implementing a shared storage between multiple (2 at the 
>>>>moment) Blade machines (Dell PowerEdge 1855) running RHEL4 ES 
>>>>connected to a EMC AX100 through FC.
>>>>
>>>>The SAN has two FC ports so the need for a FC Switch has not 
>>>>yet come however we will add other Blades in the coming months.
>>>>The one thing I haven't got figured out with GFS and the 
>>>>Cluster-Suite is the whole idea about fencing.
>>>>
>>>>We have a working setup using Centos rebuilds of the 
>>>>Cluster-Suite and GFS (http://rpm.karan.org/el4/csgfs/) which 
>>>>we are not planning to use in the final implementation where 
>>>>we plan to use the official GFS packages from Red Hat.
>>>>The fencing agents in that setup is manual fencing.
>>>>
>>>>Both machines have the file system mounted and there appears 
>>>>to be no problems.
>>>>
>>>>What does "automatic" fencing have to offer that the manual 
>>>>fencing lacks.
>>>>If we decide to buy the FC switch right away is it recomended 
>>>>that we buy one of the ones that have fencing agent available 
>>>>for the Cluster-Suite ?
>>>>
>>>>If can't get our hands on supported FC switchs can we do 
>>>>fencing in another manner than throught a FC switch ?
>>>>
>>>>
>>>>
>>>>
>>>>-- 
>>>>Sævaldur Gunnarsson :: Hugsmiðjan
>>>>
>>>>--
>>>>Linux-cluster mailing list
>>>>Linux-cluster at redhat.com
>>>>http://www.redhat.com/mailman/listinfo/linux-cluster
>>>>
>>>
>>>
>>>--
>>>Linux-cluster mailing list
>>>Linux-cluster at redhat.com
>>>http://www.redhat.com/mailman/listinfo/linux-cluster
>>
>>
>>-- 
>>Sævaldur Gunnarsson :: Hugsmiðjan
>>
>>--
>>Linux-cluster mailing list
>>Linux-cluster at redhat.com
>>http://www.redhat.com/mailman/listinfo/linux-cluster
> 
> 


-- 
Sævaldur Gunnarsson :: Hugsmiðjan