[Pacemaker] Fixed! - Re: Problem with dual-PDU fencing node with redundant PSUs

[Lars Marowsky-Bree]

On 2013-06-27T12:53:01, Digimer <lists at alteeve.ca> wrote:

> primitive fence_n01_psu1_off stonith:fence_apc_snmp \
>         params ipaddr="an-p01" pcmk_reboot_action="off" port="1"
> pcmk_host_list="an-c03n01.alteeve.ca"
> primitive fence_n01_psu1_on stonith:fence_apc_snmp \
>         params ipaddr="an-p01" pcmk_reboot_action="on" port="1"
> pcmk_host_list="an-c03n01.alteeve.ca"

So every device twice, including location constraints? I see potential
for optimization by improving how the fence code handles this ... That's
abhorrently complex. (And I'm not sure the 'action' parameter ought to
be overwritten.)

Glad you got it working, though.

> location loc_fence_n01_ipmi fence_n01_ipmi -inf: an-c03n01.alteeve.ca
[...]

I'm not sure you need any of these location constraints, by the way. Did
you test if it works without them?

> Again, this is after just one test. I will want to test it several more
> times before I consider it reliable. Ideally, I would love to hear
> Andrew or others confirm this looks sane/correct.

It looks correct, but not quite sane. ;-) That seems not to be
something you can address, though. I'm thinking that fencing topology
should be smart enough to, if multiple fencing devices are specified, to
know how to expand them to "first all off (if off fails anywhere, it's a
failure), then all on (if on fails, it is not a failure)". That'd
greatly simplify the syntax.

Can you file a bugzilla/enhancement suggestion for that?

> The crm commands used to configure this were (edited, may contain typos):

BTW, for the crm shell, you don't need to provide these in addition to
the configuration syntax you already pasted above, since that's a
complete rendering of the commands needed to recreate the configuration
already.


Regards,
    Lars

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