2011/6/27 Al Chu <[email protected]> > Hi Arnaud, >
Hi Al, thanks for your answer > On Sat, 2011-06-25 at 15:46 -0700, Arnaud Quette wrote: > > IPMI fellows, > > > > first, congrats for the FreeIPMI project. it's a cool piece of > > software ;-) > > Thanks. > > > I'm currently having a look at IPMI to implement a PSU monitor driver > > for the NUT project: > > > https://wiki.ubuntu.com/ServerOneiricInfraPower#NUT_PSU_.2BAC8_native_IPMI_driver > > > > I've had a look at the various IPMI implementations out there, and > > FreeIPMI seems the most suitable. > > I've then had a look at FreeIPMI docs, code, svn, examples, contrib, > > and there I got lost! > > the code is very complex and hidden in many abstraction layers. And > > docs and examples are not very helpful. > > I also don't see pkg-config supports files (.pc). > > Have I missed something? or isn't it developer friendly :( > > It depends on what you're trying to develop. A few libs, like > libipmimonitoring and libipmiconsole are very suitable for high level > views of IPMI. It's what a number of other developers use to do IPMI > stuff for monitoring and console access. > NUT drivers are simple daemons that acquire data from UPS / PDU / SCD / PSU, and provide access to the specific protocol through a generic namespace and interface. Here is the skeleton driver, as an example: http://anonscm.debian.org/viewvc/nut/trunk/drivers/skel.c?view=co&revision=2722&content-type=text%2Fplain There are few hooks to init acquisition, then data, and update these data. Other hooks are available for doing settings and instant command (power up, shut dow, launch a test, ...) However, most of what's in libfreeipmi is at an abstraction level where > you need to know details from the IPMI specification to know what you're > doing. > > > I've got the attached output from ipmi-fru and ipmi-sensors > > I'd like to do the exact same thing (ie identify and get all PSU > > information and events), but looking at the code and docs, I still > > don't see the light. > > So what I gather is that you're looking to be able to program access to > the FRU and sensors, rather than do it via scripts from the tools? > indeed. as mentioned above, I want a daemon, written in C, getting the PSU's FRU and sensors info at init, and then monitoring status (ie PSU fault, removed, ...). These links are detailing a bit the "why": https://wiki.ubuntu.com/ServerOneiricInfraPower#NUT_PSU_.2BAC8_native_IPMI_driver https://wiki.ubuntu.com/ServerOneiricInfraPower#PowerChain_implementation > With the current library everything you need is there. But it's not at > an abstraction level that will probably give you a very easy interface. > this is indeed the conclusion I came to. > I can describe in more detail the steps you'd have to take if you're > interested > I'm *very* interested in! this could even serve as a simple example, shipped in the examples/ directory. a final question: you've not answered on pkg-config support. I can provide a patch if needed... thanks again Al, and a good day to Jim (Garlick) if you see him at LLNL ;-) cheers, Arnaud -- Linux / Unix Expert R&D - Eaton - http://powerquality.eaton.com Network UPS Tools (NUT) Project Leader - http://www.networkupstools.org/ Debian Developer - http://www.debian.org Free Software Developer - http://arnaud.quette.free.fr/
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