[Pacemaker] AP9606 fencing device

[Pavlos Parissis]

On 27 October 2010 14:09, Vadym Chepkov <vchepkov at gmail.com> wrote:
>
[...snip...]

>> > Hold on a sec, are you using clone on AP7901? Does it support multiple
>> > connections? Mine it doesn't.
>>
>> Then it's useless regardless clone or not, you have to have multiple
>> instances, because server can't reliable fence itself, right?
>>
>>
>
> My understanding is/was that I need to have one resource running on 1 of
the
> 3 nodes in the cluster and if a fence event has to be triggered then
> pacemaker will send to it to the one stonith resource. I am planning to
test
> that the coming days.[1]
> Am I right? if not then I have to buy a different PDU! :-(
>
> My understanding is you have to have a fencing device for each of your
> hosts. Are you sure one connection limitation applies for SNMP? Most
likely
> it's only for tcp sessions - ssh/http ?

Valid point Vadym, SNMP is over UDP so conntionless communication.
I am wondering how i can test this - if cloning works on this PDU.

> If you look into rackpdu log you will see this:
> Oct 19 12:39:00 xen-11 stonithd: [8606]: debug: external_run_cmd: Calling
> '/usr/lib64/stonith/plugins/external/rackpdu gethosts'
> Oct 19 12:39:01 xen-11 stonithd: [8606]: debug: external_run_cmd:
> '/usr/lib64/stonith/plugins/external/rackpdu gethosts' output: xen-11
xen-12
> Outlet_3 Outlet_4 Outlet_5 Outlet_6 Outlet_7 Outlet_8
> Oct 19 12:39:01 xen-11 stonithd: [8606]: debug: external_hostlist: running
> 'rackpdu gethosts' returned 0
> Oct 19 12:39:01 xen-11 stonithd: [8606]: debug: external_hostlist: rackpdu
> host xen-11
> Oct 19 12:39:01 xen-11 stonithd: [8606]: debug: external_hostlist: rackpdu
> host xen-12
> Oct 19 12:39:01 xen-11 stonithd: [8606]: debug: external_hostlist: rackpdu
> host Outlet_3
> Oct 19 12:39:01 xen-11 stonithd: [8606]: debug: external_hostlist: rackpdu
> host Outlet_4
> Oct 19 12:39:01 xen-11 stonithd: [8606]: debug: external_hostlist: rackpdu
> host Outlet_5
> Oct 19 12:39:01 xen-11 stonithd: [8606]: debug: external_hostlist: rackpdu
> host Outlet_6
> Oct 19 12:39:01 xen-11 stonithd: [8606]: debug: external_hostlist: rackpdu
> host Outlet_7
> Oct 19 12:39:01 xen-11 stonithd: [8606]: debug: external_hostlist: rackpdu
> host Outlet_8
> Oct 19 12:39:01 xen-11 stonithd: [8606]: debug: remove us (xen-11) from
the
> host list for pdu:0
> check the last line - the agent is smart enough to know it can't fence
> itself.
> Vadym
>
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