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NixOS Deployments

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15 Jul 2025
@dramosac:matrix.orgDaniel Ramos

Hello!

Is anyone managing Kubernetes with Nix?
I’m looking into the simplest and most secure way to handle secrets. I tried using AgeNix to deploy them, but it isn’t working for me. I also suspect this might not be best practice, since during evaluation the secret could end up embedded in the derivation generated by Nix.

What do you use to manage cluster secrets?
Thanks!

15:54:08
@magic_rb:matrix.redalder.orgmagic_rbI use openbao-agent and vault15:55:02
@magic_rb:matrix.redalder.orgmagic_rbIts hacky but it works until i put kubernetes down15:55:12
@dramosac:matrix.orgDaniel Ramos

I'm seeing sops being used for declaring secrets: https://discourse.nixos.org/t/k3s-clusters-and-deployments-in-pure-nix/61794#p-205785-deploy-secrets-6

Then.. can I suppose that my approach with agenix is safe?

16:59:37
@dramosac:matrix.orgDaniel Ramos *

I'm seeing sops being used for declaring secrets at the docs: https://discourse.nixos.org/t/k3s-clusters-and-deployments-in-pure-nix/61794#p-205785-deploy-secrets-6

Then.. can I suppose that my approach with agenix is safe?

16:59:57
@zhaofeng:zhaofeng.liZhaofeng Li

Then.. can I suppose that my approach with agenix is safe?

No, your secrets will end up in the store

17:11:53
@zhaofeng:zhaofeng.liZhaofeng Li(which might be acceptable depending on your risk model)17:12:13
@n4ch723hr3r:nope.chatn4ch723hr3ri'd still caution against it since you might set up a cache in the future for example and accidentialy upload some credentials17:18:13
@zhaofeng:zhaofeng.liZhaofeng Li but I guess the more important issue is that reading config.age.secrets.x.path is semantically incorrect 17:18:37
@zhaofeng:zhaofeng.liZhaofeng Li(the path is on the target host after activation, not your host running the evaluation)17:18:41
@dramosac:matrix.orgDaniel RamosI guess I'm going with sealed secrets in the end.17:19:00

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