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Stage 1 systemd

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systemd in NixOs's stage 1, replacing the current bash tooling https://github.com/NixOS/nixpkgs/projects/5127 Servers

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22 Apr 2023
@elvishjerricco:matrix.org@elvishjerricco:matrix.orgsystemd initrd is opt-in14:31:01
@elvishjerricco:matrix.org@elvishjerricco:matrix.organd does not use a lot of stuff from scripted initrd, like stage-1-init.sh14:31:12
@elvishjerricco:matrix.org@elvishjerricco:matrix.org * and does not use a lot of stuff from scripted initrd, like stage-1-init.sh 14:31:17
@elvishjerricco:matrix.org@elvishjerricco:matrix.orghttps://github.com/NixOS/nixpkgs/pull/22762314:31:31
@elvishjerricco:matrix.org@elvishjerricco:matrix.org Lily Foster Arian We should probably get this in as quickly as possible 14:31:58
@elvishjerricco:matrix.org@elvishjerricco:matrix.orgWe can do the right fixes next14:32:07
@aktaboot:tchncs.de@aktaboot:tchncs.de I see, thanks, so that means the systemd initrd does not print <<< NixOS Stage 1 >>> ? 14:32:11
@elvishjerricco:matrix.org@elvishjerricco:matrix.orgright14:32:18
@aktaboot:tchncs.de@aktaboot:tchncs.deokay that was my confusion, thanks :)14:32:34
@elvishjerricco:matrix.org@elvishjerricco:matrix.orghttps://github.com/NixOS/nixpkgs/pull/22763315:05:59
@elvishjerricco:matrix.org@elvishjerricco:matrix.orgIn case anyone wants to help me hunt down potential things that break the assertions15:06:19
@jaredbaur:matrix.org@jaredbaur:matrix.org joined the room.21:02:05
23 Apr 2023
@elvishjerricco:matrix.org@elvishjerricco:matrix.orgHm plymouith seems to be adding about 6 seconds to my initrd boot time.07:50:29
@elvishjerricco:matrix.org@elvishjerricco:matrix.orgThe initrd systemd unit that imports my ZFS pool is basically instant, taking only as long as it takes to enter the password. But that import service takes about 6 seconds longer with plymouth, and it seems to take those 6 seconds for the password prompt to appear at all07:50:56
@elvishjerricco:matrix.org@elvishjerricco:matrix.org * The initrd systemd unit that imports my ZFS pool is basically instant, taking only as long as it takes to enter the password. But that import service takes about 6 seconds longer with plymouth, and it seems to spend those 6 seconds waiting for the password prompt to appear at all07:51:24
@janne.hess:helsinki-systems.de@janne.hess:helsinki-systems.deWouldn't be surprised after looking at some Plymouth code. Their design doesn't seem to be optimal or even good 09:08:33
@elvishjerricco:matrix.org@elvishjerricco:matrix.orgYea, but adding 6 superfluous seconds to the boot time seems like something the Canonical or RedHat people would have gotten upset about and fixed09:12:19
@lily:lily.flowers@lily:lily.flowers
In reply to @elvishjerricco:matrix.org
Yea, but adding 6 superfluous seconds to the boot time seems like something the Canonical or RedHat people would have gotten upset about and fixed
I mean our plymouth hasn't been updated in a while, so it could also just already be fixed upstream (I had a branch I mentioned at https://github.com/NixOS/nixpkgs/pull/217728#discussion_r1136088299 which seemed to incidentally fix several other plymouth issues along the way but I never got a response)
11:17:33
@lily:lily.flowers@lily:lily.flowersI probably should just clean up the commits/messages on that branch and PR it to get more review on it11:23:05
@elvishjerricco:matrix.org@elvishjerricco:matrix.org Huh. TIL gpt-auto-generator doesn't work with pkgs.systemdStage1. I mean, it doesn't work at all without a patch to put the root fs on the cmdline instead of fstab, but with that fixed, I still had to set boot.initrd.systemd.package = pkgs.systemd 21:32:04
@elvishjerricco:matrix.org@elvishjerricco:matrix.org Oh, it's probably because of withEfi = false in systemdMinimal 21:33:26
@elvishjerricco:matrix.org@elvishjerricco:matrix.org (I am becoming increasingly convinced that we should default boot.initrd.systemd.package = config.systemd.package) 21:34:29
@aktaboot:tchncs.de@aktaboot:tchncs.despeaking of that, is there a way to let the luks decryption not show asterisks for the passphrase ?21:36:10
@elvishjerricco:matrix.org@elvishjerricco:matrix.orgI believe so...21:36:28
@aktaboot:tchncs.de@aktaboot:tchncs.deI will look into it tommorrow if I remember21:36:39
@elvishjerricco:matrix.org@elvishjerricco:matrix.org boot.initrd.luks.devices.foo.crypttabExtraOpts = ["password-echo=no"] I think? 21:37:02
@elvishjerricco:matrix.org@elvishjerricco:matrix.org Hm. For a simple nixosTest, the initrd is only 0.036M 21:39:26
@elvishjerricco:matrix.org@elvishjerricco:matrix.org 35864 bytes to be specific 21:39:49
@elvishjerricco:matrix.org@elvishjerricco:matrix.orgI'll do some more testing on this, but I'm really thinking we should just use the regular systemd in initrd21:40:06
24 Apr 2023
@oddlama:matrix.orgoddlamaI'd like to get a quick debug shell going with systemd stage1 for some networking stuff. Do I have to create a new unit and insert it into the dependency chain or is there a better way?15:16:03

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