pyghmi is growing SDR, SEL, FRU, and other stuff. I can add in-band so long as there is always python in there, however out-of-band does not need to be too bad. In the case of a baremetal guest, for example, gathering such data in-band would require more cooperation of the tenant image, whereas out-of-band should always be workable in ipmi equipped systems.
The biggest ding in out-of-band is that ipmitool is one-to-one and also has
to retrieve SDR every time it wants to go read sensors. pyghmi will
support an evolution of xCAT's SDR caching scheme to avoid the hit (at
least if the sensors objects are reused). We have had success completing a
complete sensor read of 4,000 systems with a single system in about 15
seconds out of band in xCAT, and pyghmi optimizes away some overhead that
xCAT did not (though that overhead isn't as significant for something as
verbose as sensor reading).
From: "Gao, Fengqian" <fengqian....@intel.com>
To: "openstack-dev@lists.openstack.org"
<openstack-dev@lists.openstack.org>
Cc: Devananda van der Veen <devananda....@gmail.com>, Jarrod B
Johnson/Raleigh/IBM@IBMUS, "Lu, Lianhao"
<lianhao...@intel.com>, "Wang, Shane" <shane.w...@intel.com>
Date: 11/19/2013 01:07 AM
Subject: [Ironic] A question about getting IPMI data
Hi, all,
As the summit session
https://etherpad.openstack.org/p/icehouse-summit-ceilometer-hardware-sensors
said, ironic will expose IPMI data to ceilometer, but I have a couple
questions here.
1. What kind of IPMI data will be collected? I assume that power,
temperature or other sensor data is needed, right?
2. How do we get all these data?
IIUC, ironic did not involve too much about IPMI for now, only used
ipmitool and pyghmi module.
Using IPMItool to execute command and parsing the output is easy to
understand. But seems not a good way for me. The pyghmi only supports
out-of-band(net-payload) now. So, I am wondering if we can extend the
function of pyghmi to provide more interfaces?
Be specifically, I think pyghmi can provide in-band IPMI interface
including IPMB or system interface etc. and allowed to get IPMI data in the
OS.
Is all this make sense to you?
Thanks for your response
Best Regards,
-fengqian<<inline: graycol.gif>>
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