Tuesday, 2020-02-25

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kozhukalovarne_wiebalck: Thanks for clarification04:42
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openstackgerritMaël Kimmerlin proposed openstack/ironic master: Redfish: Add root_prefix to Sushy  https://review.opendev.org/70734206:33
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arne_wiebalckmid-cycle starting now08:40
arne_wiebalckhttps://indico.cern.ch/event/863986/videoconference/08:41
mgoddardmorning arne_wiebalck08:41
mgoddardI can't hear anyone08:42
arne_wiebalckchecking08:42
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openstackgerritHarald Jensås proposed openstack/ironic master: Additional IP addresses to IPv6 stateful ports  https://review.opendev.org/70000210:04
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mgoddardarne_wiebalck: I don't know if you've started again but I can't see or hear you15:06
TheJuliamgoddard: we're having some issues in the new conference room15:06
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openstackgerritMark Goddard proposed openstack/tenks master: DNM: Test libvirt-host role ansible_python  https://review.opendev.org/70476617:22
openstackgerritMark Goddard proposed openstack/tenks master: WIP: CentOS 8 support  https://review.opendev.org/69588117:25
openstackgerritMark Goddard proposed openstack/tenks master: WIP: CentOS 8 support  https://review.opendev.org/69588117:26
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diurnalisthello all, I work with Ironic on a decent size (~300 nodes) deployment for an academic testbed (Chameleon). we are looking in to creating a custom hardware manager to perform some additional in-band cleaning. i'm confused by reading the docs though. how does ironic know about what custom clean steps via hardware managers are available? it seems like it has to ask IPA to do that, which implies17:39
diurnalista ramdisk w/ IPA has already been deployed.17:39
diurnalistalso, if anybody has info about how to reliably build a custom hardware manager into IPA, i'd be grateful17:39
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JayFdiurnalist: hey, I have the perfect thing for you friend18:18
JayFhttps://opendev.org/x/ipa-example-hardware-managers/18:19
JayFLet me know if looking over those examples help. It's pretty extensively documented inline.18:19
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diurnalistJayF: thanks, that's very helpful! just what I was missing.18:43
JayFNot a problem :) If you have any issues or questions you can ping me, although replies may be high-latency as I don't always have time to work upstream.18:43
diurnalistsure -- another thing I am anticipating is, do you have any strategies for debugging this? i saw CERN slides that said that they used a custom DIB element that will git clone their hw manager repo when the ramdisk starts (to avoid re-building it when the hwm changes)18:45
diurnalistthat will help with the feedback loop. but i'm wondering what is the best way to just do sanity checks on the ramdisk or pull logs if something isn't working18:45
JayFI don't know how to answer that question well in context of modern Ironic. I think there's an option to leave a node booted in the case of a failure, and you can console in and investigate.18:46
JayFIPA will also ship logs, I believe18:46
JayFThe big advice I'd give you is to be 100% certain your clean steps are solid, through testing, before automating them.18:46
diurnalistah ok, interesting. i use kolla and do think that it is sending boot logs to centralized logging.18:46
diurnalistyep, makes sense18:46
JayFIME the "hard part" is getting things like firmware-flashing utilities working in a ramdisk or unattended18:47
JayFIDK what your use case is for hardware managers, but that's the issues I tended to run into when implementing this originally for an environment at a previous job.18:47
diurnalistour use-case is more to decorate the hardware information that ironic pulls by default, but we will likely want to do other hardware/firmware related things :)18:48
diurnalistso we have a bit of a luxury to start with reading as opposed to writing18:48
JayFYeah, depending on what exactly oyu mean by that, it might not be a hardware manager method that you can edit18:48
diurnalistwe are looking into list_hardware_info, i think was the function18:49
JayFthat's totally in the hardware manager, so you're on the right path18:49
JayFI don't know if you have to change anything on the other side (inspector) as well or not though, I'm not well-versed on those pieces.18:49
diurnalisti think we will cross that bridge when we come to it, i will be happy when we can at least report some additional info back18:50
JayFgood luck! Hope you enjoy using Ironic.18:50
diurnalistother question for my clarity... given that Ironic must need to "find" these custom HWMs, how does that play in to the fact that you can presumably define custom out-of-band clean steps? does that mean that it has to first load the ramdisk on the node, then ask IPA which clean steps it supports, then somehow exit to call the out-of-band step via ilo or something?18:51
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JayFbingo18:52
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JayFI think you understand more than you let on :)18:52
diurnalistok, and then it also assumes that you have perhaps installed a custom hardware _driver_ in addition to the IPA hardware _manager_ so it can e.g. perform out-of-band via the management interface, not the deploy interface18:53
diurnalist:)18:53
JayFNot neccessarily "custom", but you get the idea18:53
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JayFit builds the list at clean-time  in order to take the node hardware into account18:53
diurnalisti see, that makes sense18:54
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diurnalistcheers, thanks! that helps. i like to know how something is working under the hood18:54
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