Friday, 2020-08-14

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openstackgerritGhanshyam Mann proposed openstack/openstack-zuul-jobs master: DNM: tesing pdf building  https://review.opendev.org/74632714:34
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openstackgerritGhanshyam Mann proposed openstack/openstack-zuul-jobs master: DNM: tesing pdf building  https://review.opendev.org/74632717:08
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gmannAJaeger: can we merge this now  - https://review.opendev.org/#/c/738030/  so that we can remove the zuul.yaml - https://review.opendev.org/#/c/745161/117:26
openstackgerritGhanshyam Mann proposed openstack/openstack-zuul-jobs master: DNM: tesing pdf building  https://review.opendev.org/74632717:27
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JayFIs this the right channel to ask questions about diskimage-builder? I'm having an issue with a custom element where a script in post-install.d/ does not appear to be executing, even though I can see it copying into hooks18:42
JayFHmm. Maybe just needed a chmod +x 10-script-name18:42
clarkbJayF: I think dib has a channel on its own but this is fine18:42
clarkband yes it needs to be +x18:42
JayFcool, I'll start idling there18:43
JayFand thanks for the ducking. Always without fail, I ask then get hit across the head with an obvious clue-by-four18:43
JayFlol18:43
clarkbJayF: no worries. I find the rubber ducking is useful too (just lookin #opendev scrollback today, half of it is me talking out loud)18:44
JayFI gotta say though, last time I worked with DIB, years and years ago (5? 6? years ago) for building ramdisks, I wasn't super happy with it18:44
JayFthese days, it's really low friction, most things just work and the docs are a++18:45
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fungiJayF: #openstack-dib if you eventually need it18:46
JayFyeah; I guessed and got there when clark pointed me to one existing at all18:47
fungii'd like to imagine that dib improved in part due to nodepool starting to rely on it, though the folks who work on dib with any regularity do deserve most of the credit18:48
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melwittclarkb: hi, I have been trying to learn about how CI nodes sometimes come up with multiple IP addresses in the 'ansible_all_ipv4_addresses' shown in job-output.json. is that something that happens automatically or does zuul or nodepool configure it? I know nothing about this, just trying to get a pointer in the right direction21:21
clarkbmelwitt: its all based on how clouds provide networking to us. Openstack has a diverse set of options there and we certainly see a good chunk of them21:22
clarkbrackspce for example gives you two interfaces a public and a private with two different ipv4 addresses21:23
clarkbI think currently they are the only ones that do more than one address per IP version21:23
melwittclarkb: ok cool, so it's not something we are prescribing and when they hand us a node it can have a variety of IPs21:23
clarkbsome clouds do floating IPs though and we technically have two IPs but we only ever see the private one21:23
clarkbmelwitt: correct21:23
melwittclarkb: thank you, that helps a lot :)21:24
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fungimelwitt: see also https://docs.opendev.org/opendev/infra-manual/latest/testing.html21:47
melwittthanks21:48
melwittfor some reason, I never knew that it was the provider who does the server create (and thus specifies the network and flavor etc). I had thought our zuul/nodepool calls the openstack API of the provider to create a server itself21:50
melwittso when I read docs I didn't quite realize what it was saying (oops)21:51
funginodepool does call server create but doesn't specify networks/ports (in some cases we can't), so at the mercy of provider defaults21:53
fungiit's all part of openstack's awesome history of interoperability ;)21:55
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melwittyeah, I did find that we don't specify networks in our nodepool configs in project-config but I wasn't sure what that results in. now I know :)21:56
fungiit depends on the provider. in some we have to specify networks, in some we can't, and then there's the grey area21:57
melwittok, I see21:57
fungisome only have unique global ipv6 and do ipv4 via overload nat, some are only reachable by floating ip, and so on21:58
fungithis frustration is basically the origins of shade and "give me a network"21:58
melwittyeah I wondered if it related to the get-me-a-network stuff22:01
fungiyep, the inconsistency with network connectivity models we had to deal with in nodepool is what caused mordred to push on that22:02
fungiwe were essentially embedding per-provider business logic to work out how to provide reachable addresses to server instances22:04
clarkbthat and in many cloud setups booting a VM was super easy. SSH'ing into that VM was basically impossible if you didn't know the secret incantation22:04
clarkbyou had to create a subnet, network, and router in the correct order, boot VM on the network. Add exteranl network to the router...22:05
clarkbfor a while it was the only thing I ever used horizon for22:05
fungiyeah, openstack has come a long way22:06
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melwittyeah, makes sense. I can relate to the concept of easy to boot the VM, hard to SSH in heh22:08
melwitt*experience22:09
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