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#openstack-nova - 2022-03-08
17:19:59 gmann bauzas: ethercal seems down for me too at least.
17:20:07 sean-k-mooney basiically if feels asymetic to me
17:20:15 bauzas gmann: ok, I'll try to jab diablo_rojo
17:20:22 sean-k-mooney deprecations in ticks vs tocks have diffeent notice periods
17:20:36 gmann bauzas: sean-k-mooney and we can plan something in TC+PTL sessions too where dansmith can explain/answer the question.
17:20:40 rribaud__ bauzas, same for me https://ethercalc.openstack.org/7yxdas7suqnd seems not answering.
17:20:46 sean-k-mooney i could see jus extendign to at least 2 release working
17:21:40 sean-k-mooney e.g. depreacte in a tick (cant remove till next tick) deprecate in tock (cant remove until next tock)
17:21:58 bauzas gmann: sure, I think I got the memo but discussing the outcomes is a good idea
17:21:58 sean-k-mooney that way all deprecation have at least 2 cycles of notice
17:22:18 sean-k-mooney but it does not end up pilling up 2 cycles of removals into every tick
17:22:40 bauzas sean-k-mooney: take it as we won't do any removal or deprecation during a tock release
17:22:51 sean-k-mooney bauzas: i really dont like that idea
17:22:53 bauzas those are just skipped releases for ops by now
17:22:59 dansmith bauzas: right, that's the easiest thing to do
17:23:23 dansmith bauzas: for something that's really big, if we wanted two ticks of deprecation, removing in the following tock would be reasonable
17:23:39 dansmith maybe something like n-net or virt/xen where we wanted lots of notice
17:23:44 bauzas sean-k-mooney: we have the TC+PTL session before our nova PTG sessions, it's good you gonna attend those
17:23:58 sean-k-mooney i proably will
17:24:13 bauzas dansmith: I see
17:24:20 sean-k-mooney but we will see we need to do this consitently across openstack
17:24:28 bauzas dansmith: deprecate in A, B, C and drop in D
17:24:46 bauzas which means operators would notice it in E
17:24:50 dansmith bauzas: for something really major yeah.. just an example
17:24:51 sean-k-mooney for big things perhaps
17:25:01 sean-k-mooney but in general that feels pretty heavy weight
17:25:16 bauzas dansmith: oh, yeah, got it
17:25:22 dansmith sean-k-mooney: well, I think it's in line with how we've handled things like virt/xen
17:25:37 dansmith and n-net certainly had looots of time between effective death and removal :)
17:25:53 bauzas yeah I see
17:26:11 sean-k-mooney right but that means things like the rpc proxy shoudl not be removed for 3-4 cycles
17:26:14 bauzas we can remove things in a tock release as ops would catch up on it on the next tick release
17:26:27 sean-k-mooney or reshapes which granted we have nver removed yet
17:26:31 bauzas sean-k-mooney: like the RPC compatibilities
17:26:39 sean-k-mooney its not just deprecation it affect
17:27:00 bauzas we can technically drop RPC compat on a tock release, it's just ops won't get it in effect until the next tick
17:27:21 sean-k-mooney so this feels abit like longer release cycles by stelth in a way that i am not sure is sustainable
17:27:54 dansmith sean-k-mooney: it is like that, and not by stealth
17:28:00 dansmith the whole point of this was to strike a balance
17:28:11 sean-k-mooney ya which this does not really do
17:28:14 dansmith the benefit here over longer cycles is that, deprecation aside, we can release *features* every cycle :)
17:28:33 dansmith and we can deliver code, fixes, changes to people more often than once a year
17:28:52 bauzas dansmith: but I guess we'd think of forward porting the relnotes to the next tick release ?
17:28:53 sean-k-mooney yes
17:29:06 dansmith bauzas: I'd say just prelude items
17:29:11 bauzas dansmith: a good reno tooling opportunity
17:29:18 dansmith bauzas: i.e. anything major enough to make it into prelude in a tock is candidate for tick
17:29:20 sean-k-mooney but we are addign teh cost of maintianing things we want to deprecate and remove for 2-3 release instead of just one to two
17:29:41 dansmith sean-k-mooney: yep, this is not free for sure.. but it's benefit to people, which has a cost
17:29:41 gmann which is what we do in most of the case currently
17:29:59 sean-k-mooney like with the xen removeal we woudl have deprecated it in one relase and had to wait 2 release to remove it after noone stepped up to maintian it
17:30:00 bauzas dansmith: this sounds reasonable, I need to see how to split the prelude in multiple patches
17:30:23 bauzas dansmith: so we could forward port the big prelude patch to the next release
17:30:43 dansmith bauzas: or just manually copy the items.. I don't think you need to get too sophisticated :)
17:30:57 bauzas are you asking copy/paste ? man !
17:31:00 sean-k-mooney bauzas: actuly i think we want reno to know what tick and tock releases are
17:31:18 sean-k-mooney and include the release notes form the previous tock in the tick
17:31:19 dansmith sean-k-mooney: personally, I wouldn't do that
17:31:24 sean-k-mooney no
17:31:28 dansmith I think that's a mistake
17:31:32 sean-k-mooney why ?
17:31:50 dansmith don't make them read double the release notes, as compiled by a computer
17:32:01 dansmith bring forward the important bits (i.e. likely the content of the prelude)
17:32:06 sean-k-mooney an operator goign form tick 1 to tick 2 need to know everythign that happend in tock 1 right
17:32:20 dansmith they can read the intermediate release notes if they want, but don't just concat them
17:32:35 sean-k-mooney i guess
17:32:51 sean-k-mooney i hate having to look in mulitple places
17:32:56 gmann we can add a line in the top or so that 'to know all change from tick1->tick2 read these tock releasenotes too'
17:32:57 dansmith just MHO, but I think we're already incredibly verbose on the renos
17:32:57 sean-k-mooney but you coudl do it either way
17:33:19 sean-k-mooney dansmith: i mean perhaps prelude and upgrades section maybe
17:33:40 sean-k-mooney i guess we will figure it out
17:33:47 gmann will there be any upgrade section in tock? i mean we want to avoid those like depreaction right
17:33:59 dansmith gmann: sometimes features bring upgrade items I think
17:34:00 sean-k-mooney gmann: there should be
17:34:17 sean-k-mooney gmann: i really dont thinik we shoudl try to avoid either in a tock
17:34:22 gmann ah new feature. got it
17:34:32 sean-k-mooney if we do it will slow down devleopment
17:34:54 sean-k-mooney gmann: addin a db migraition for a new feature woudl be an upgrade impact i coudl see in a tock
17:35:05 dansmith sean-k-mooney: remember this is a compromise, some things will have to change.. hopefully less with this than the alternative
17:35:09 gmann making release notes page too verbose and long make them hard to read good things. I think link to tock releease notes in tick releasenotes should be fine
17:35:21 dansmith gmann: agree
17:35:55 sean-k-mooney dansmith: right but if we cant do db changes in a tock or rpc change for example then tha tis not a compromise
17:36:20 dansmith sean-k-mooney: as noted, I think it's totally fine to *add* things to db and rpc in tock
17:38:48 bauzas yup
17:39:00 bauzas we can rpc bump things in a tock
17:39:12 bauzas if we have rpc compat of courser
17:39:25 bauzas we can add a db upgrade script too
17:40:06 bauzas we can even remove a rpc compat on a tock release if compat was there on the previous tick
17:40:22 bauzas rpc aliases will continue to exist
17:40:31 bauzas and microversions too
17:41:18 bauzas but somehow we need to settle a couple of rules we gonna write on our contrib docs
17:41:54 bauzas that's why I want us to agree on the impacts for nova so we can write it down
17:42:27 gmann bauzas: +1.
17:43:07 gmann bauzas: sean-k-mooney added it on TC+PTL slots, L27 - https://etherpad.opendev.org/p/tc-ptl-interaction-zed
17:45:07 sean-k-mooney gmann: thanks
17:45:44 sean-k-mooney bauzas: yes we have time to figure that out before AA
17:53:24 sean-k-mooney ok im hungery so im going to grab something to eat i might be on irc later but i will likely just work on some reviews for the evning
17:53:48 opendevreview Sylvain Bauza proposed openstack/nova master: Add the Yoga prelude section https://review.opendev.org/c/openstack/nova/+/832292
17:54:07 bauzas gmann: dansmith: melwitt: sean-k-mooney: gibi: new revision for the Yoga prelude ^

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