Mailinglist Archive: opensuse-ha (2 mails)

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Re: [opensuse-ha] Support for the kdumpcheck STONITH plugin in HAE
Dejan -

I should have followed up on this list. I spoke with Jeff Christian via an SR and he filed FATE #317235 for me. So it is in the system if you want to track it.

- Ron

On 4/2/14 9:14 AM, Dejan Muhamedagic wrote:
Hi Ron,

On Mon, Mar 24, 2014 at 10:07:13AM -0400, Ron Kerry wrote:
We have a customer that has requested that Novell provide full support for
the kdumpcheck STONITH plugin in SLE-HAE.

The plugin is documented in the SLE HAE manual in section 9.5 "Special Fencing
Devices".

http://doc.opensuse.org/products/draft/SLE-HA/SLE-ha-guide_sd_draft/cha.ha.fencing.html#sec.ha.fencing.special

external/kdumpcheck

This plug-in checks if a Kernel dump is in progress on a node. If so, it
returns true, and acts as if the node has been fenced. The node cannot run
any resources during the dump anyway. This avoids fencing a node that is
already down but doing a dump, which takes some time. The plug-in must be
used in concert with another, real STONITH device. For more details, see
/usr/share/doc/packages/cluster-glue/README_kdumpcheck.txt.

The plugin is also provided as part of the sle-ha pattern set of packages.
However, the plugin requires a patch to mkdumprd that is not present in the
SLES distribution. There is some history in SLES bugzilla associated with
this plugin and mkdumprd.
https://bugzilla.novell.com/show_bug.cgi?id=445870

Essentially, mkdumprd is a RHEL mechanism, so Novell will need to figure
out the equivalent changes to enable use of this STONITH plugin. As it is,
it is not usable despite being present and documented in the HAE Guide.

Note that the real requirement here is some sort of robust mechanism to
allow a crash dump to take place when HA is active with STONITH enabled. Is
there some other supported way to do this? Can kdumpcheck be made to work
in a SLES11 SP3 HAE environment?

Apparently, it would not be trivial. I'd suggest to open a FATE
request for the feature.

Best regards,

Dejan

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Ron Kerry

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Ron Kerry rkerry@xxxxxxx
Global Product Support - SGI Federal

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