[Pacemaker] 2 sbd devices and stonith-ng is showing (1 active devices)

[Andrew Beekhof]

On Fri, Mar 16, 2012 at 8:08 AM, Lars Marowsky-Bree <lmb at suse.com> wrote:
> On 2012-03-15T15:39:23, "Janec, Jozef" <jozef.janec at hp.com> wrote:
>
>> We have configured pacemaker on HAE  from novell:
>>
>> cat /etc/sysconfig/sbd
>> SBD_DEVICE="/dev/mapper/SHARED1_part1;/dev/mapper/SHARED2_part1"
>> SBD_OPTS="-W"
>>
>> I'm running  2 instances of watcher
>>
>> root      9157     1  0 11:00 pts/0    00:00:00 sbd: inquisitor
>> root      9158  9157  0 11:00 pts/0    00:00:00 sbd: watcher: /dev/mapper/SHARED1_part1 - slot: 0
>> root      9159  9157  0 11:00 pts/0    00:00:00 sbd: watcher: /dev/mapper/SHARED2_part1 - slot: 1
>
> That looks fine, but did you read
> http://www.linux-ha.org/wiki/SBD_Fencing about the limitations of using
> 2 devices?
>
>> I have running one resource per node
>>
>> Online: [ b300ple0 b400ple0 ]
>>
>> sbd_fense_b400  (stonith:external/sbd): Started b400ple0
>> sbd_fense_b300  (stonith:external/sbd): Started b300ple0
>
> Why that? Did you read http://www.linux-ha.org/wiki/SBD_Fencing?
>
> You only have to have one external/sbd per cluster. A single primitive
> is sufficient. No need to run several, nor to clone them.
>
>> Mar 17 11:03:51 b400ple0 stonith-ng: [9467]: info: stonith_device_register: Added 'sbd_fense_b400' to the device list (1 active devices)
>
> Yes, because from the point of view of the stonith-ng, there is only one
> "sbd" device, though that internally uses two storage devices - which
> stonith-ng doesn't know about.
>
>> I got:
>>
>> 15 11:15:33 b300ple0 stonith-ng: [8546]: debug: exec_child_done: Got 60 more bytes: Performing: stonith -t external/sbd -S  failed:  0.05859375
>> Mar 15 11:15:33 b300ple0 stonith-ng: [8546]: notice: log_operation: Operation 'monitor' [15803] for device 'sbd_fense_b300' returned: 1
>> Mar 15 11:15:33 b300ple0 stonith-ng: [8546]: debug: log_operation: sbd_fense_b300 output: Performing: stonith -t external/sbd -S
>> Mar 15 11:15:33 b300ple0 stonith-ng: [8546]: debug: log_operation: sbd_fense_b300 output: failed:  0.05859375
>> Mar 15 11:15:33 b300ple0 lrm-stonith: [15802]: debug: execra: sbd_fense_b300_monitor returned 1
>> Mar 15 11:15:33 b300ple0 stonith-ng: [8546]: debug: log_operation: sbd_fense_b300 output:  (total 60 bytes)
>
> The agent itself should also have logged something.
>
> Have you, by chance, configured one external/sbd instance per device?
> That would be wrong; you need to run one external/sbd instance per
> cluster for all devices.
>
> Did you read http://www.linux-ha.org/wiki/SBD_Fencing?

Are you suggesting he read http://www.linux-ha.org/wiki/SBD_Fencing?
You shouldn't be so subtle, best
http://www.linux-ha.org/wiki/SBD_Fencing to
http://www.linux-ha.org/wiki/SBD_Fencing be
http://www.linux-ha.org/wiki/SBD_Fencing explicit
http://www.linux-ha.org/wiki/SBD_Fencing.