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Re: [Freeipmi-users] SDR cache not updated

From: Al Chu
Subject: Re: [Freeipmi-users] SDR cache not updated
Date: Mon, 19 Jul 2021 10:10:35 -0700

Hi Michael,

So a subtlety of --sdr-cache-recreate is that it will only update your
SDR cache if its out of date.  My suspicion, is that your hardware SDR
/ firmware was updated, but the vendor did not update the SDR
timestamps, thus FreeIPMI did not believe the SDR was out of date. 
(You can see these timestamps via ipmi-sensors -i).

Unfortunately the solution is to simply flush the sdr cache (--flush-
cache) and force its recreation.  The interval you want to do this is
sort of up to you.

Perhaps you could script to check if the firmware version has changed
and only force the --flush-cache when necessary?  You can see this via
bmc-info, but this of course assumes the vendor bothered to update the
firmware revision number.


On Mon, 2021-07-19 at 16:23 +0000, FRANK Michael wrote:
> Hello,
> we use ipmi-sensors with the option --sdr-cache-recreate In a script
> which is scheduled every minute for monitoring purpose.
> On one of our sites we had a lot of false positive events on two
> servers ( see attached logs).
> Finally, I found out that the SDR cache file was already 3 years old.
> After flushing the cache all sensors went back to normal. The only
> thing was that 11 sensors left had been discovered.
> My question is now how this option --sdr-cache-recreate is working
> and what can I do to let ipmi-sensors automatically refresh the cache
> file in case something changes on the remote end.
> I am worried about what happen if new FRUs are added. If the cache
> file is not updated with new sensors, we miss the monitoring of newly
> added things,
> Any help is much appreciated 
> Michael FRANK
> Supervisor Global Monitoring Architecture
> Faurecia Clean Mobility
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