#nixos-systemd on 2020-09-21

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11:14 <pie_> specifically i want to switch out tincd for one with debug symbols

11:14 <pie_> how do you start service files manually? everything is immutable so i cant change anything and i need to debug something

11:14 <pie_> systemd-run doesnt look like it can take a service file

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11:34 <arianvp> I just found we have a pretty nasty regression in systemd since 20.03

11:35 <arianvp> It seems this file isn't being loaded by systemd anymore?

11:35 <arianvp> https://github.com/systemd/systemd/blob/master/rules.d/99-systemd.rules.in#L39-L49

11:35 <arianvp> /sys/subsystem does not exist on my 20.03 server. which is _very bad

11:36 <arianvp> E.g. I migrated my consul cluster to 20.03; and it stopped working; as /sys/subsystem/net/devices/<network name> doesnt exist on 20.03

11:36 <arianvp> https://github.com/NixOS/nixpkgs/blob/54eb2d10184124a8bd6cc01ff815c30aa8aebf35/nixos/modules/services/networking/consul.nix#L19

11:36 <arianvp> so this module has been broken since 20.03 release :/

11:38 <pie_> man systemd.unit lists some additional search paths which dont seem to work on nixos, and i cant find via google how to list the search path...

11:43 <pie_> well the questions still stand but i managed to shove the service file in /run/systemd/system/tinc/ , /me runs off in a hurry

11:44 <pie_> <boucman_work> and no, you can't add custom paths or look for units at different places afaik

11:44 <pie_> <boucman_work> to list the paths : systemd-analyze unit-paths

11:49 <arianvp> nevermind pebkac

11:49 <arianvp> systemd-analyze unit-paths isn't accurate on nixos

11:49 <arianvp> unfortunately

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16:15 <pie_> arianvp: so wat do?

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17:11 <flokli> pie_: /run/systemd/system/… should work, shouldn't it?

17:17 <pie_> it did yet but still

17:17 <pie_> *it did yes, but still

17:18 <pie_> though i seem to have hit another snag trying to debug this thing because nspawn doesnt seem to have a way to disable seccomp, only enabling syscalls individually

17:19 <pie_> and rr wont run

17:20 <pie_> https://lists.freedesktop.org/archives/systemd-devel/2020-June/044756.html

17:28 <flokli> uuf

17:37 <pie_> it has been brought to my attention that that syntax is a bit more flexible than at first visible

17:38 <pie_> looking at the man page its not evident if ~* will whitelist or "blacklist" everything

17:38 <pie_> in the meantime i have this abomination i pasted into the container script: https://bpa.st/7TWQ

17:38 <pie_> copied and cleaned from https://man7.org/linux/man-pages/man2/syscalls.2.html

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20:47 <pie_> word of advice, write notes _while_ youre doing something, not afterwards (ranting and being confused in IRC with backlog helps); https://github.com/gsliepen/tinc/issues/252

20:47 <{^_^}> gsliepen/tinc#252 (by deliciouslytyped, 5 minutes ago, open): segfault (stack smashing) under unknown circumstances