[Pacemaker] AP9606 fencing device

[Dejan Muhamedagic]

On Wed, Oct 27, 2010 at 04:42:31PM +0200, Pavlos Parissis wrote:
> On 27 October 2010 14:09, Vadym Chepkov <vchepkov at gmail.com> wrote:
> 
> >
> > On Oct 27, 2010, at 7:58 AM, Pavlos Parissis wrote:
> >
> >
> > On 27 October 2010 13:43, Vadym Chepkov <vchepkov at gmail.com> wrote:
> >
> >>
> >> On Oct 27, 2010, at 7:27 AM, Pavlos Parissis wrote:
> >>
> >> > On 27 October 2010 13:12, Vadym Chepkov <vchepkov at gmail.com> wrote:
> >> >>
> >> >> On Oct 27, 2010, at 3:47 AM, Pavlos Parissis wrote:
> >> >>>
> >> >>> Does anyone know any other PDU which works out of box with the
> >> >>> supplied stonith agents?
> >> >>>
> >> >>
> >> >> I use APC AP7901, works like a charm:
> >> >>
> >> >> primitive pdu stonith:external/rackpdu \
> >> >>        params pduip="10.6.6.6" community="pdu-6" hostlist="AUTO"
> >> >> clone fencing pdu
> >> >>
> >> >> Vadym
> >> >
> >> > Then most likely the defaults OIDs of the rackpdu agents matches the
> >> > OIDs of the AP7901.
> >> > In my case I have to use OID for the device itself
> >> > 1.3.6.1.4.1.318.1.1.4.4.2.1.3  and OID for retrieving (snmpwalk) the
> >> > outlet list .1.3.6.1.4.1.318.1.1.4.4.2.1.4 .
> >> >
> >> > 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 ?
> > 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.
> >
> >
> >
> do you enable debug by setting debug 1 on ha.cf?
> do you see that WARN on your system?
> stonith-ng: [3369]: WARN: parse_host_line: Could not parse (0 42):
> /usr/lib/stonith/plugins/external/rackpdu: line 125: local: can only be used
> in a function

This is a bug in rackpdu. Fixed now.

Thanks,

Dejan

> Cheers,
> Pavlos

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