colmena VS agenix

- rpi nas

I also wipe my entire rootfs every boot with a zfs snapshot rollback[2] using the impermanence module[3] to keep specific stateful data one one of two datasets with regular snapshots: one is backed up with zfs send, the other is just for cache between reboots.

It took a little puzzling to get started, because I didn’t know about the impermanence module, so I built my own hacky solution. But I really love this setup. And the way I don’t have cruft to clean.

Also my backups are so much smaller now :’-)

[1]: https://colmena.cli.rs/

Answering your broader question (secret management) colmena does that for me outside the Nix store. I also use git-crypt to store secrets in the repo. There are also more Nix-y alternatives like agenix.

There are 4 tools I'm taking into consideration right now, but every suggestion is welcome: 1. deploy-rs - I don't know anything about it, heard about it like a day or two ago 2. NixOps - the official one, I don't know what to think, but I have concerns about Flakes compatibility 3. morph - I understand this as "NixOps, but better", no more toughs. 4. colmena - seems to be pretty straightforward with quite nice docs

They shouldn't be, Colmena stringifies the keyFile values which is the same approach as NixOps uses to avoid this. Apparently I implemented that part myself, haha.

I myself use colmena's apply-local. Anyway, totally relate to the meme. Using the same tool to manage your servers and workstations, and reusing stuff between them is amazing.

How about: https://github.com/ryantm/agenix

I've heard good things about and seen sops-nix used on a few really solid configs. Others tend to use Age or Homeage.

I don't have a write-up, just my code in git. But it's not public. I'm not using anything out of the ordinary - Nix containers, modules, and functions, and the Agenix module with uses a private key to decrypt secrets at start. The Nix language is inherently composable. Here are some links that explain:

Containers:

https://nixos.wiki/wiki/NixOS_Containers

Modules:

https://nixos.wiki/wiki/NixOS_modules

Functions:

https://www.reddit.com/r/NixOS/comments/zzstun/please_help_m...

Agenix:

https://github.com/ryantm/agenix

For passwords I am using agenix which is also pretty awesome, an alternative could have been sops.nix.

Alternatively, you could simply add the wireless connection files to the Networkmanager dir in /etc using environment.etc. Though keep in mind that any file declared in your config is readable by any user in your system. agenix would be the solution to that.

One think I saw that I don't recommend is to change your password after installing; that's not very reporoducible, use users.users..hashedPassword or users.users..passwordFile with agenix or sops-nix.

Answering your broader question (secret management) colmena does that for me outside the Nix store. I also use git-crypt to store secrets in the repo. There are also more Nix-y alternatives like agenix.

I feel that trying to make SSH keys short-lived is becoming more painful each year because there's an increase of tools that use SSH keys for purposes other than SSH logins. For example, age [1] encrypts files with SSH keys, agenix [2] does secrets management with it, Git can now sign commits with it [3], and even ssh-keygen can now sign arbitrary data [4]. All of these become useless the moment you start using short-lived keys.

[1]: https://github.com/FiloSottile/age

[2]: https://github.com/ryantm/agenix

[3]: https://calebhearth.com/sign-git-with-ssh

[4]: https://www.man7.org/linux/man-pages/man1/ssh-keygen.1.html

I built this because I try to keep as much as possible outside of my system config but all of the secret managers I found were system only. I had no idea how to solve this until I found RaitoBezarius' awesome pull request to agenix where it all clicked. It also exposed me to the inner workings of home-manager which has definitely made me appreciate it more! I kept this separate from agenix because I am interested only in a module rather than a CLI and thus see it as having a different fit.

I've been thinking about the same thing. I haven't gotten around to it yet but agenix looked the most promising to me so far