[#5] adding sops support #6

Merged
nerf merged 1 commit from nerf/nixConfig:nerf/sops-nix into main 2023-09-25 19:23:43 +00:00
6 changed files with 89 additions and 2 deletions

16
.sops.yaml Normal file
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@ -0,0 +1,16 @@
keys:
- &nerf age1rasjnr2tlv9y70sj0z0hwpgpxdc974wzg5umtx2pnc6z0p05u3js6r8sln
- &nyarlathotep age1s99d0vlj5qlm287n98jratql5fypvjrxxal0k5jl2aw9dcc8kyvqw5yyt4
creation_rules:
- path_regex nixos/machines/nyarlathotep/.*
key_groups:
- age:
*nerf
*nyarlathotep
# this is the catchall clause if nothing above machtes. Encrypt to users but not
# to machines
- key_groups:
- age:
*nerf

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@ -11,3 +11,28 @@ nix build .#nixosConfiguration.<name>.config.system.build.toplevel
### On the machine
clone this repo to `/etc/nixos/` and `nixos-rebuild` that will select
the appropriate machine based on hostname
### sops
We are sharing secrets using [`sops`](https://github.com/getsops/sops) and [`sops-nix`](https://github.com/Mic92/sops-nix)
As of right now we use only `age` keys.
The machine keys are derived from their server ssh keys, that they generate at first boot.
User keys are generated by the users.
New keys and machines need entries into the `.sops.yaml` file within the root directory of this repo.
To make a secret available on a given machine you need to do the following. Configure the following keys
```
sops.secrets.example-key = {
sopsFile = "relative path to file in the repo containing the secrets (optional else the sops.defaultSopsFile is used)
path = "optinal path where the secret gets symlinked to, practical if some programm expects a specific path"
owner = user that owns the secret file: config.users.users.nerf.name (for example)
group = same as user just with groups: config.users.users.nerf.group
mode = "premission in usual octet: 0400 (for example)"
```
afterwards the secret should be available in `/run/secrets/example-key`.
If the accessing process is not root it must be member of the group `config.users.groups.keys`
for systemd services this can be archived by setting `serviceConfig.SupplementaryGroups = [ config.users.groups.keys.name ];`
it the service config.

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@ -104,11 +104,49 @@
"type": "github"
}
},
"nixpkgs-stable": {
"locked": {
"lastModified": 1694908564,
"narHash": "sha256-ducA98AuWWJu5oUElIzN24Q22WlO8bOfixGzBgzYdVc=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "596611941a74be176b98aeba9328aa9d01b8b322",
"type": "github"
},
"original": {
"owner": "NixOS",
"ref": "release-23.05",
"repo": "nixpkgs",
"type": "github"
}
},
"root": {
"inputs": {
"flake-parts": "flake-parts",
"nixos-mailserver": "nixos-mailserver",
"nixpkgs": "nixpkgs"
"nixpkgs": "nixpkgs",
"sops-nix": "sops-nix"
}
},
"sops-nix": {
"inputs": {
"nixpkgs": [
"nixpkgs"
],
"nixpkgs-stable": "nixpkgs-stable"
},
"locked": {
"lastModified": 1695284550,
"narHash": "sha256-z9fz/wz9qo9XePEvdduf+sBNeoI9QG8NJKl5ssA8Xl4=",
"owner": "Mic92",
"repo": "sops-nix",
"rev": "2f375ed8702b0d8ee2430885059d5e7975e38f78",
"type": "github"
},
"original": {
"owner": "Mic92",
"repo": "sops-nix",
"type": "github"
}
},
"utils": {

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@ -10,6 +10,10 @@
nixpkgs.follows = "";
};
};
sops-nix = {
url = "github:Mic92/sops-nix";
inputs.nixpkgs.follows = "nixpkgs";
};
};
outputs = inputs@{ flake-parts, ... }:

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@ -11,7 +11,7 @@
pkgs.nixos {
imports = [
(import (./. + "/machines/${name}/configuration.nix") inputs)
# inputs.secrets.nixosModules.default
inputs.sops-nix.nixosModules.sops
];
};
in lib.genAttrs machines makeSystem);

4
nixos/roles/default.nix Normal file
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@ -0,0 +1,4 @@
{ ... } : {
sops.age.sshKeyPaths = [ "/etc/ssh/ssh_host_ed25519_key" ];
}