[Linux-HA] question: external/ssh stonith to poweroff badnode
via xen-host
Lino Moragon
lino.moragon at highspeed.li
Mon Mar 3 12:08:26 MST 2008
Serge Dubrouski wrote:
> Configuration looks right to me, I even tested it and it worked fine
> on my test cluster. So hints are obvious:
>
> 1. Check that you really put that script on a second node and made it
> executable.
>
That was my first error, but i noticed a error message in the logfile and corrected it.
So i can exclude this posibility
> 2. Nodes should be able to ping each other. That programmed in a
> "status" function.
>
What do you mean by "programmed in a status function?" From each node I can ping the other one. It also works fine with name resolution.
Do you think, it could possibly be an issue with my current version (2.1.2-3)?
With which version did you try the configurations?
when you start the Clone the first time, then both resources should start (on node1 as well as on node2) is that correct?
Could it be another configuration error outside the clone_id section in the cib? Could you perhaps attach your whole CIB?
Thanks for your support so far, I'm very grateful.
Lino
>
>
> On Mon, Mar 3, 2008 at 9:16 AM, Lino Moragon <lino.moragon at highspeed.li> wrote:
>
>> Hi,
>>
>> I'm using now the most actual xen0 stonith plugin, that Serge attachted
>> the 2008-02-28 to this thread.
>> I thought I configured everything correct but it seems that the stonith
>> clone cannot be started on my 2nd node.
>> I must admit I configured the Clone via hb_gui but I still have some issues.
>> As for these reasons the stonith plugin only works to reset my 2nd node
>> and not vice versa.
>> The version I am using is: heartbeat-2.1.2-3 of the Centos5.1 repository.
>>
>> Has anyone a clue where the failure could be?
>>
>> To this email I attach the cib.xml
>> Below follows the cib stonith section, crm_verfy and error msgs.
>>
>> Perhaps Serge, you could give me a hint? What did you do differently
>> than me?
>>
>> I would be very glad for any hints and clues.
>>
>> Thanks in advance,
>> Lino
>>
>> node1: mysql1
>> node2: mysql2
>> xen-host: simulator
>>
>> <clone id="DoFencing">
>> <instance_attributes id="DoFencing_instance_attrs">
>> <attributes>
>> <nvpair id="DoFencing_clone_max" name="clone_max" value="2"/>
>> <nvpair id="DoFencing_clone_node_max" name="clone_node_max"
>> value="1"/>
>> <nvpair id="DoFencing_target_role" name="target_role"
>> value="started"/>
>> </attributes>
>> </instance_attributes>
>> <primitive class="stonith" type="external/xen0"
>> provider="heartbeat" id="child_DoFencing">
>> <instance_attributes id="child_DoFencing_instance_attrs">
>> <attributes>
>> <nvpair name="target_role"
>> id="child_DoFencing_target_role" value="started"/>
>> <nvpair name="hostlist"
>> id="5525c381-5956-4564-af3d-2bc7b547812a" value="mysql1:mysql1.cfg
>> mysql2:mysql2.cfg"/>
>> <nvpair id="65feeaf5-501f-4648-a155-83b79b587fbf"
>> name="dom0" value="simulator"/>
>> </attributes>
>> </instance_attributes>
>> </primitive>
>> </clone>
>>
>> If I use crm_verify I get the following results:
>> =============================================================
>> crm_verify[6169]: 2008/03/03_17:06:55 WARN: unpack_rsc_op: Processing
>> failed op (child_DoFencing:0_start_0) on mysql2
>> crm_verify[6169]: 2008/03/03_17:06:55 WARN: unpack_rsc_op: Handling
>> failed start for child_DoFencing:0 on mysql2
>> crm_verify[6169]: 2008/03/03_17:06:55 WARN: unpack_rsc_op: Processing
>> failed op (child_DoFencing:1_start_0) on mysql2
>> crm_verify[6169]: 2008/03/03_17:06:55 WARN: unpack_rsc_op: Handling
>> failed start for child_DoFencing:1 on mysql2
>> =============================================================
>>
>> Furthermore I get the following Errors in my log:
>> =============================================================
>> Mar 3 16:29:42 mysql2 crmd: [1478]: ERROR: process_lrm_event: LRM
>> operation child_DoFencing:0_start_0 (call=22, rc=1) Error unknown error
>> Mar 3 16:29:46 mysql2 crmd: [1478]: ERROR: process_lrm_event: LRM
>> operation child_DoFencing:1_start_0 (call=24, rc=1) Error unknown error
>> Mar 3 16:35:33 mysql2 crmd: [1478]: ERROR: process_lrm_event: LRM
>> operation child_DoFencing:1_start_0 (call=28, rc=1) Error unknown error
>> Mar 3 16:46:40 mysql2 crmd: [1477]: ERROR: process_lrm_event: LRM
>> operation child_DoFencing:0_start_0 (call=10, rc=1) Error unknown error
>> Mar 3 16:46:45 mysql2 crmd: [1477]: ERROR: process_lrm_event: LRM
>> operation child_DoFencing:1_start_0 (call=12, rc=1) Error unknown error
>> ==============================================================
>>
>>
>>
>>
>>
>> Serge Dubrouski schrieb:
>> > Attached.
>> >
>> > On Thu, Feb 28, 2008 at 3:35 AM, Dejan Muhamedagic <dejanmm at fastmail.fm> wrote:
>> >> Hi Serge,
>> >>
>> >>
>> >> On Tue, Feb 26, 2008 at 09:46:14AM -0700, Serge Dubrouski wrote:
>> >> > Dejan -
>> >> >
>> >> > I found a compromise :-) Attached is a version of that plugin that
>> >> > supports following parameters:
>> >> >
>> >> > 1. hostlist. A string that has a list of controlled nodes separated by
>> >> > space or commas. A required parameter. In a simple form its just a
>> >> > list of nodes. If one needs to use non-standard Xen configuration he
>> >> > can use extended form of this parameter: "node1_name:config1_file
>> >> > node2_name:config2_file". If config file isn't given it defaults to
>> >> > /etc/xen/node_name.cfg
>> >> >
>> >> > 2. Dom0. Name of Dom0 Xen node. A required parameter.
>> >> >
>> >> > 3. ssh_command. SSH command that is used to ssh from DomU to Dom0.
>> >> > Defaults to "/usr/bin/ssh -q -x -n -l root". If one wants to use SSH
>> >> > keys for higher security he needs to use this parameter.
>> >>
>> >> This is not necessary. One can setup everything needed in
>> >> ~/.ssh/config on a per host basis, i.e. key or user to connect
>> >> with. Since the plugin always runs as root, you might leave out
>> >> '-l root' as well.
>> >>
>> >>
>> >> > So in this form this plugin can be configured as a clone or as a set
>> >> > of resources and location constraints.
>> >> >
>> >> >
>> >> > I'd be very pleased if this plugin gets its way into Linux-HA distribution.
>> >> >
>> >>
>> >> Sure. Could you please just drop the ssh_command parameter.
>> >>
>> >> Many thanks for the contribution.
>> >>
>> >> Cheers,
>> >>
>> >> Dejan
>> >>
>> >>
>> >>
>> >> >
>> >> > On Tue, Feb 26, 2008 at 8:45 AM, Serge Dubrouski <sergeyfd at gmail.com> wrote:
>> >> > >
>> >> > > On Mon, Feb 25, 2008 at 4:02 PM, Dejan Muhamedagic <dejanmm at fastmail.fm> wrote:
>> >> > > > Hi,
>> >> > > >
>> >> > > >
>> >> > > > On Mon, Feb 25, 2008 at 12:17:40PM -0700, Serge Dubrouski wrote:
>> >> > > > > On Mon, Feb 25, 2008 at 12:10 PM, Dejan Muhamedagic <dejanmm at fastmail.fm> wrote:
>> >> > > > > > Hi,
>> >> > > > > >
>> >> > > > > >
>> >> > > > > > On Mon, Feb 25, 2008 at 11:27:38AM -0700, Serge Dubrouski wrote:
>> >> > > > > > > I would love to do that and already tried it. Though we didn't come to
>> >> > > > > > > agreement on how configuration parameters should look like.
>> >> > > > > >
>> >> > > > > > Why? Was there a discussion on the list about it? The
>> >> > > > > > configuration is a bit unusual. Other stonith agents take named
>> >> > > > > > parameters. Though this kind of configuration also works, I'd
>> >> > > > > > prefer something similar to the others, e.g.
>> >> > > > >
>> >> > > > > Yes there was a discussion
>> >> > > > > http://lists.community.tummy.com/pipermail/linux-ha-dev/2007-February/
>> >> > > >
>> >> > > > It's a long one and peters out inconclusively.
>> >> > > >
>> >> > > >
>> >> > > > > See "new stonith external plugin". The config parameter hostslist is
>> >> > > > > actually derived from original ssh plugin. I needed to have a full
>> >> > > > > list of all controlled nodes and preferred to have it as one
>> >> > > > > parameter.
>> >> > > > >
>> >> > > > > >
>> >> > > > > > hostname dom0 (or xenhost) config
>> >> > > > > >
>> >> > > > >
>> >> > > > > That would work if I needed just a dom0 host, but I also need a list
>> >> > > > > of controlled nodes and probably configuration files.
>> >> > > >
>> >> > > > That's why you can have several instances of a stonith resource
>> >> > > > (see e.g. external/ipmi). Each of them would run with different
>> >> > > > parameters. What I meant was:
>> >> > > >
>> >> > > > hostname: xen vm
>> >> > > > dom0: xen dom0
>> >> > > > config: vm configuration file
>> >> > > >
>> >> > >
>> >> > > That's possible and easy to do but I'm not sure that it'll be better.
>> >> > > Current version allows to configure a clone. New version would require
>> >> > > configuring a separate resource for each node and creating location
>> >> > > constraints for each of them. Per my opinion that would be more
>> >> > > complex configuration. May be I'm missing something.
>> >> > >
>> >> >
>> >> >
>> >> >
>> >> > --
>> >> > Serge Dubrouski.
>> >>
>> >>
>> >>
>> >>> _______________________________________________
>> >> > Linux-HA mailing list
>> >> > Linux-HA at lists.linux-ha.org
>> >> > http://lists.linux-ha.org/mailman/listinfo/linux-ha
>> >> > See also: http://linux-ha.org/ReportingProblems
>> >>
>> >> --
>> >> Dejan
>> >>
>> >>
>> >> _______________________________________________
>> >> Linux-HA mailing list
>> >> Linux-HA at lists.linux-ha.org
>> >> http://lists.linux-ha.org/mailman/listinfo/linux-ha
>> >> See also: http://linux-ha.org/ReportingProblems
>> >>
>> >
>> >
>> >
>> >
>> > ------------------------------------------------------------------------
>> >
>> > _______________________________________________
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>> > Linux-HA at lists.linux-ha.org
>> > http://lists.linux-ha.org/mailman/listinfo/linux-ha
>> > See also: http://linux-ha.org/ReportingProblems
>>
>>
>>
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>>
>>
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