| 8 Mar 2025 |
 K900 | It's created when you start sshd for the first time, in /etc/ssh/sshhostkey_ed25519 | 07:17:05 |
 laurent | Ahh thx, i wasnt even aware of this folder! I put my key in my ~/.ssh as for other linux! | 07:20:11 |
| K900 | Those are different keys | 07:20:23 |
| K900 | Your key in ~/.ssh identifies your user | 07:20:28 |
| K900 | The host key in /etc/ssh identifies the machine | 07:20:35 |
| laurent | Got it! And when i set up agenix i encrypted with my user key, which i then use in the identityfile option of agenix! So i should have encrypted with the host machine correct? But this host ssh key is automatically regenerated on a new nixos install? | 07:25:13 |
| K900 | You encrypt with the public part of the host key | 07:25:36 |
| K900 | And then it's decrypted with the private part | 07:25:43 |
| laurent | * Got it! And when i set up agenix, i encrypted with my user key, which i then use in the identityfile option of agenix! So i should have encrypted with the host machine correct? But this host ssh key is automatically regenerated on a new nixos install? | 07:25:45 |
| K900 | And yes, the host key is generated per machine | 07:25:48 |
| K900 | So you probably want to also encrypt to your own user key, so you can access the secrets if you don't have any of the host keys | 07:26:06 |
| laurent | Thx! I did everything the wrong way then. So the host key needs obviously to be backed up. I ll check some doc to see how to reinstall it the nix way on a fresh install.thx a lot fornyour help | 07:29:13 |
 Valodim | It does not need to be backed up. Just create a new one and rekey on redeployment | 07:49:26 |
| laurent | In reply to @Valodim:stratum0.org
It does not need to be backed up. Just create a new one and rekey on redeployment Do you mean to re encrypt all secrets with the then new host key? | 08:13:45 |
| Valodim | Yes | 08:14:05 |
| Valodim | The same as you'll have to do on other occasions when public keys changes, e.g. when some secret should be available for a new host | 08:14:57 |
| Valodim | Maybe study the agenix docs some more. it's in there :) | 08:15:13 |
| laurent | In reply to @Valodim:stratum0.org
Maybe study the agenix docs some more. it's in there :) I reckon thats what i have to do haha. Been wanting to take shortcuts with nix to be able to have a quick working env but its time to go back to the doc now that i understand more the ecosystem | 08:17:33 |
|  Qyriad changed their display name from qyriad to Qyriad. | 21:41:03 |
| 9 Mar 2025 |
|  kiwicutter joined the room. | 23:34:49 |
| 10 Mar 2025 |
| kiwicutter | So, ive been using agenix for a bit and only now thought to myself hey, maybe i should check how (easily) recreating my system actually is in case i ever need to do so. The issue i ran into was, of course, that the install media can't decrypt any secrets during nixos-install. Is there a way to supply a user or a previous host key to that or do i have to re-key everything? | 00:01:46 |
| Valodim | Personally I find it's easiest to deploy a relatively blank nixos (e.g. just disk config), rekey, then do the full in install. Doesn't hurt to have new host keys once in a while, but ymmv | 06:35:11 |
 Daniel RodrÃguez Rivero | If that is the intended usage, would not be SOPS simpler? It will work fine without the secrets, then you put them and run again to get the data decryted for real | 08:19:45 |
| Valodim | agenix also "works fine" without secrets, the secret files just won't be there 🤷 | 08:25:52 |
| Daniel RodrÃguez Rivero | then you don't need a relatively blank anything, no? | 08:28:16 |
| Daniel RodrÃguez Rivero | just don't depend on secrets for your system to function | 08:28:33 |
| Valodim | maybe I just misunderstood what you meant by "sops will work fine without the secrets". I'd think it behaves very similar to agenix in this regard | 08:33:54 |
| kiwicutter | Yeah fair point tbh, as long as the secrets don't prevent the system from running itll be easy enough to rekey right after. | 08:42:17 |
| kiwicutter | I guess the host keys will only be generated during a first startup though and not already during nixos-install? Else one could already check those and rekey right after the install.. | 08:43:32 |
| Daniel RodrÃguez Rivero | As far as I know, they just put empty files in places, instead of failing. Is that what agenix does too? | 08:54:16 |
