Move forge tailnet secrets to agenix

Scripts/check-forge-host.sh

@@ -157,6 +157,13 @@ done
 echo "== intake =="
 ls -l /var/lib/burrow/intake || true
 
+if [[ "${EXPECT_TAILNET}" == "1" ]]; then
+  echo "== agenix =="
+  ls -l /run/agenix || true
+  test -s /run/agenix/burrowAuthentikEnv
+  test -s /run/agenix/burrowHeadscaleOidcClientSecret
+fi
+
 if command -v curl >/dev/null 2>&1; then
   echo "== http-local =="
   curl -fsS -o /dev/null -w 'forgejo_login %{http_code}\n' http://127.0.0.1:3000/user/login

flake.lock

@@ -1,5 +1,50 @@
 {
   "nodes": {
+    "agenix": {
+      "inputs": {
+        "darwin": "darwin",
+        "home-manager": "home-manager",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1770165109,
+        "narHash": "sha256-9VnK6Oqai65puVJ4WYtCTvlJeXxMzAp/69HhQuTdl/I=",
+        "owner": "ryantm",
+        "repo": "agenix",
+        "rev": "b027ee29d959fda4b60b57566d64c98a202e0feb",
+        "type": "github"
+      },
+      "original": {
+        "owner": "ryantm",
+        "repo": "agenix",
+        "type": "github"
+      }
+    },
+    "darwin": {
+      "inputs": {
+        "nixpkgs": [
+          "agenix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1744478979,
+        "narHash": "sha256-dyN+teG9G82G+m+PX/aSAagkC+vUv0SgUw3XkPhQodQ=",
+        "owner": "lnl7",
+        "repo": "nix-darwin",
+        "rev": "43975d782b418ebf4969e9ccba82466728c2851b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "lnl7",
+        "ref": "master",
+        "repo": "nix-darwin",
+        "type": "github"
+      }
+    },
     "disko": {
       "inputs": {
         "nixpkgs": [
@@ -19,7 +64,7 @@
     },
     "flake-utils": {
       "inputs": {
-        "systems": "systems"
+        "systems": "systems_2"
       },
       "locked": {
         "lastModified": 1731533236,
@@ -45,6 +90,27 @@
         "url": "https://codeload.github.com/apricote/hcloud-upload-image/tar.gz/v1.3.0"
       }
     },
+    "home-manager": {
+      "inputs": {
+        "nixpkgs": [
+          "agenix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1745494811,
+        "narHash": "sha256-YZCh2o9Ua1n9uCvrvi5pRxtuVNml8X2a03qIFfRKpFs=",
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "rev": "abfad3d2958c9e6300a883bd443512c55dfeb1be",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1773389992,
@@ -59,6 +125,7 @@
     },
     "root": {
       "inputs": {
+        "agenix": "agenix",
         "disko": "disko",
         "flake-utils": "flake-utils",
         "hcloud-upload-image-src": "hcloud-upload-image-src",
@@ -79,6 +146,21 @@
         "repo": "default",
         "type": "github"
       }
+    },
+    "systems_2": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
     }
   },
   "root": "root",

flake.nix

@@ -4,6 +4,10 @@
   inputs = {
     nixpkgs.url = "tarball+https://codeload.github.com/NixOS/nixpkgs/tar.gz/nixos-unstable";
     flake-utils.url = "tarball+https://codeload.github.com/numtide/flake-utils/tar.gz/main";
+    agenix = {
+      url = "github:ryantm/agenix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
     disko = {
       url = "tarball+https://codeload.github.com/nix-community/disko/tar.gz/master";
       inputs.nixpkgs.follows = "nixpkgs";
@@ -14,7 +18,7 @@
     };
   };
 
-  outputs = { self, nixpkgs, flake-utils, disko, hcloud-upload-image-src }:
+  outputs = { self, nixpkgs, flake-utils, agenix, disko, hcloud-upload-image-src }:
     let
       supportedSystems = [
         "x86_64-linux"
@@ -161,6 +165,7 @@
 
         packages =
           {
+            agenix = agenix.packages.${system}.agenix;
             hcloud-upload-image = hcloudUploadImagePkg;
             forgejo-nsc-dispatcher = forgejoNscDispatcher;
             forgejo-nsc-autoscaler = forgejoNscAutoscaler;
@@ -180,6 +185,7 @@
           inherit self;
         };
         modules = [
+          agenix.nixosModules.default
           disko.nixosModules.disko
           ./nixos/hosts/burrow-forge/default.nix
         ];

nixos/README.md

@@ -12,6 +12,7 @@ Mail hosting is intentionally not part of this NixOS host in the current plan. B
 - `modules/burrow-forgejo-nsc.nix`: Namespace-backed ephemeral Forgejo runner services
 - `modules/burrow-authentik.nix`: minimal Authentik IdP for Burrow control planes
 - `modules/burrow-headscale.nix`: Headscale control plane rooted in Authentik OIDC
+- `../secrets.nix`: agenix recipient map for tracked Burrow forge secrets
 - `hetzner-cloud-config.yaml`: desired Hetzner host shape
 - `keys/contact_at_burrow_net.pub`: initial operator SSH public key
 - `keys/agent_at_burrow_net.pub`: automation SSH public key
@@ -32,7 +33,7 @@ Mail hosting is intentionally not part of this NixOS host in the current plan. B
 4. Let `burrow-forgejo-bootstrap.service` create or rotate the initial Forgejo admin account.
 5. Let `burrow-forgejo-runner-bootstrap.service` register the self-hosted Forgejo runner and seed Git identity as `agent <agent@burrow.net>`.
 6. Run `Scripts/provision-forgejo-nsc.sh` locally, then `Scripts/sync-forgejo-nsc-config.sh` to place the Namespace dispatcher/autoscaler runtime inputs under `/var/lib/burrow/intake/`.
-7. Ensure `/var/lib/burrow/intake/authentik.env` exists on the host, and let `services.burrow.headscale` generate `/var/lib/burrow/intake/authentik_headscale_client_secret.txt` on first boot if it is absent.
+7. Ensure `/var/lib/agenix/agenix.key` exists on the host, encrypt `secrets/infra/authentik.env.age` and `secrets/infra/headscale-oidc-client-secret.age`, and let agenix materialize them under `/run/agenix/`.
 8. Use `Scripts/cloudflare-upsert-a-record.sh` to point `git.burrow.net`, `burrow.net`, `auth.burrow.net`, `ts.burrow.net`, and `nsc-autoscaler.burrow.net` at the host with Cloudflare proxying disabled for ACME.
 9. Use `Scripts/forge-deploy.sh --allow-dirty` for subsequent remote `nixos-rebuild` runs from the live workspace.
 10. Configure Forward Email custom S3 backups for `burrow.net` and `burrow.rs` out-of-band with `Tools/forwardemail-custom-s3.sh`.
@@ -40,6 +41,7 @@ Mail hosting is intentionally not part of this NixOS host in the current plan. B
 ## Current Constraints
 
 - `burrow-forge` is live on NixOS in `hel1` at `89.167.47.21`, and `Scripts/check-forge-host.sh --expect-nsc` passes locally against that host.
+- Authentik and Headscale secrets now live in tracked agenix blobs under `secrets/infra/` and decrypt to `/run/agenix/` on the forge host.
 - Public Burrow forge cutover completed on March 15, 2026:
   - `burrow.net`, `git.burrow.net`, and `nsc-autoscaler.burrow.net` now publish public `A` records to `89.167.47.21`
   - HTTP redirects to HTTPS on all three names

nixos/hosts/burrow-forge/default.nix

@@ -1,4 +1,4 @@
-{ self, ... }:
+{ config, self, ... }:
 
 {
   imports = [
@@ -20,6 +20,20 @@
     "flakes"
   ];
 
+  age.identityPaths = [ "/var/lib/agenix/agenix.key" ];
+  age.secrets.burrowAuthentikEnv = {
+    file = ../../../secrets/infra/authentik.env.age;
+    owner = "root";
+    group = "root";
+    mode = "0400";
+  };
+  age.secrets.burrowHeadscaleOidcClientSecret = {
+    file = ../../../secrets/infra/headscale-oidc-client-secret.age;
+    owner = "root";
+    group = "root";
+    mode = "0400";
+  };
+
   networking.extraHosts = ''
     127.0.0.1 burrow.net git.burrow.net auth.burrow.net ts.burrow.net nsc-autoscaler.burrow.net
     ::1 burrow.net git.burrow.net auth.burrow.net ts.burrow.net nsc-autoscaler.burrow.net
@@ -53,11 +67,12 @@
 
   services.burrow.authentik = {
     enable = true;
-    envFile = "/var/lib/burrow/intake/authentik.env";
-    headscaleClientSecretFile = "/var/lib/burrow/intake/authentik_headscale_client_secret.txt";
+    envFile = config.age.secrets.burrowAuthentikEnv.path;
+    headscaleClientSecretFile = config.age.secrets.burrowHeadscaleOidcClientSecret.path;
   };
 
   services.burrow.headscale = {
     enable = true;
+    oidcClientSecretFile = config.age.secrets.burrowHeadscaleOidcClientSecret.path;
   };
 }

nixos/modules/burrow-headscale.nix

@@ -191,7 +191,9 @@ in
         set -euo pipefail
 
         list_users() {
-          ${pkgs.headscale}/bin/headscale users list -o json
+          local users_json
+          users_json="$(${pkgs.headscale}/bin/headscale users list -o json)"
+          printf '%s\n' "$users_json" | ${pkgs.jq}/bin/jq -c 'if type == "array" then . else [] end'
         }
 
         ensure_user() {

secrets.nix

@@ -0,0 +1,14 @@
+let
+  contact = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIO42guJ5QvNMw3k6YKWlQnjcTsc+X4XI9F2GBtl8aHOa";
+  agent = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIEN0+tRJy7Y2DW0uGYHb86N2t02WyU5lDNX6FaxBF/G8 agent@burrow.net";
+  burrowForgeHost = "age1quxf27gnun0xghlnxf3jrmqr3h3a3fzd8qxpallsaztd2u74pdfq9e7w9l";
+  burrowForgeRecipients = [
+    contact
+    agent
+    burrowForgeHost
+  ];
+in
+{
+  "secrets/infra/authentik.env.age".publicKeys = burrowForgeRecipients;
+  "secrets/infra/headscale-oidc-client-secret.age".publicKeys = burrowForgeRecipients;
+}