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| 26 Mar 2026 |
 Yifei Sun | one problem i have with colmena is if the deployment is done over vpn (say tailscale), and the update requires tailscale or nftables to restart, the deployment would fail | 20:57:19 |
| Yifei Sun | maybe we can change the deployment model a little so that instead of running the switch to configuration directly, we start a transient systemd unit with systemd-run so that the activation keeps going even if the network restarts | 20:58:36 |
| 28 Mar 2026 |
 Eli Saado | interesting, I've not noticed this
I know deployrs has this issue too, and they have a feature called magic-rollback, which rolls back to the previous config if it doesn't receive an acknowledgement, which makes it even worse
| 11:21:30 |
| Yifei Sun | i would say this is pretty easy to reproduce
change the deployment config target node ssh host to tailscale address and override that node’s tailscale name or version or smth it should break | 11:23:15 |
| Yifei Sun | i have llm generated slop patch for detached switch to configuration but i dont think it has the quality to be upstreamed 😂 | 11:26:25 |
| Eli Saado | and the new config doesn't get applied? | 11:26:53 |
| Yifei Sun | it errors out | 11:27:10 |
| Yifei Sun | because ssh connection will get terminated and it’s not handled gracefully | 11:27:33 |
| Yifei Sun | imo the best solution to this would be adding a detached bool flag for deployment config, and a -d/—detached cli flag | 11:28:47 |
| Yifei Sun | https://github.com/stepbrobd/colmena/commit/c5b062e5248ebdfeecf5cb3bf96d4302c278bd3d | 11:29:33 |
| Eli Saado | right, and the rest of the activation script never finishes? | 11:31:10 |
| Yifei Sun | i don’t remember the exact behavior but the error log was like ssh 255 and the rest got terminated leaving the system in a intermediate half broken state | 11:32:46 |
| Eli Saado | ah that's bad | 11:33:20 |
| Yifei Sun | i usually use boot goal with reboot flag when this happens and that sometimes hangs 😂 | 11:33:41 |
| Yifei Sun | i figured this is easily solvable by adding tcptimeout and server keep alive time out to smth like 10sec in ssh options but imo it would be better to enable these ssh options by default | 11:34:46 |
| Yifei Sun | if anyone with more rust knowledge would want to collaborate on this i’d love to get this fixed | 11:36:23 |
| Yifei Sun | btw cuda maintainer gaétan and i chatted a while back and he also found that the meta.nixpkgs is only used in colmena internally and you can literally instantiate with any system it’d still work | 11:37:52 |
| Yifei Sun | https://github.com/GaetanLepage/nix-config/blob/9bc50d15806536b3e8599ed8c176642e337868fd/modules/flake/colmena.nix#L21 | 11:38:25 |
| Yifei Sun | looks like this is mostly caused by the hermetic guard here: https://github.com/zhaofengli/colmena/blob/349b035a5027f23d88eeb3bc41085d7ee29f18ed/src/nix/hive/eval.nix#L89
they are only using it to use lib , get the path to eval-config.nix in nixpkgs (https://github.com/zhaofengli/colmena/blob/349b035a5027f23d88eeb3bc41085d7ee29f18ed/src/nix/hive/eval.nix#L122), and reinject overlays and configs (https://github.com/zhaofengli/colmena/blob/349b035a5027f23d88eeb3bc41085d7ee29f18ed/src/nix/hive/eval.nix#L129) | 14:30:39 |
| Yifei Sun | imo its totally possible this bootstrap is done in colmena (i.e. ask users to only pass in normal nixpkgs without instantiation and set the platform to a constant like x86_64-linux in colmena for bootstrap) so users are less confused lmaooo
or even better, we dont even need bootstrap to get overlays and configs, just create a few more meta knobs and ask users to pass overlays and configs in | 14:32:45 |
|  Gaétan Lepage joined the room. | 14:35:54 |
