Switch the matrix hosts secret management from colmena to sops-nix

.sops.yaml

@@ -12,6 +12,7 @@ keys:
   - &admin_gpg_dante 3D70F61E07F64EC4E4EF417BEFCD9D20F58784EF
   - &host_age_git age18zaq9xg9nhqyl8g7mvrqhsx4qstay5l9cekq2g80vx4920pswdfqpeafd7
   - &host_age_forgejo_actions_runner age10xz2l7ghul7023awcydf4q3wurmszy2tafnadlarj0tvm7kl033sjw5f8t
+  - &host_age_matrix age1f7ams0n2zy994pzt0u30h8tex6xdcernj59t4d70z4kjsyzrr3wsy87xzk
 creation_rules:
   - path_regex: config/hosts/git/.*
     key_groups:
@@ -45,6 +46,22 @@ creation_rules:
           - *admin_gpg_dante
         age:
           - *host_age_forgejo_actions_runner
+  - path_regex: config/hosts/matrix/.*
+    key_groups:
+      - pgp:
+          - *admin_gpg_djerun
+          - *admin_gpg_stb
+          - *admin_gpg_jtbx
+          - *admin_gpg_yuri
+          - *admin_gpg_june
+          - *admin_gpg_haegar
+          - *admin_gpg_dario
+          - *admin_gpg_echtnurich
+          - *admin_gpg_max
+          - *admin_gpg_c6ristian
+          - *admin_gpg_dante
+        age:
+          - *host_age_matrix
   - key_groups:
       - pgp:
           - *admin_gpg_djerun

config/hosts/matrix/default.nix

@@ -7,5 +7,6 @@
     ./postgresql.nix
     ./matrix-synapse.nix
     ./nginx.nix
+    ./sops.nix
   ];
 }

config/hosts/matrix/matrix-synapse.nix

@@ -44,20 +44,16 @@
     };
 
     extraConfigFiles = [
-      "/secrets/matrix-registration-shared-secret.secret"
+      "/run/secrets/matrix_registration_shared_secret"
     ];
   };
 
   systemd.services.matrix-synapse.serviceConfig.ReadWritePaths = [ config.services.matrix-synapse.settings.media_store_path ];
 
-  deployment.keys = {
-    "matrix-registration-shared-secret.secret" = {
-      keyCommand = [ "pass" "noc/vm-secrets/chaosknoten/matrix/registration-shared-secret" ];
-      destDir = "/secrets";
-      user = "matrix-synapse";
+  sops.secrets."matrix_registration_shared_secret" = {
+    mode = "0440";
+    owner = "matrix-synapse";
     group = "matrix-synapse";
-      permissions = "0640";
-      uploadAt = "pre-activation";
-    };
+    restartUnits = [ "matrix-synapse.service" ];
   };
 }

config/hosts/matrix/secrets.yaml

@@ -0,0 +1,233 @@
+matrix_registration_shared_secret: ENC[AES256_GCM,data:5fKfTqwoUreSIPbua5t1lYZFRnQQjNzFvrIBVIBfKWu20kH4BhlDboL/zYnhWLELq/KykX/EUvijoZxxTnUiN7T8H3L6fKOCQKacZkIwKfg/JjqLVnXIaY0JOwg=,iv:Cazhdo7YR0zSgiyQoHLsk2e4dWGSoSfEtOuMA1LEJcg=,tag:KsbnGvEyRbzbIXuAayQk5A==,type:str]
+sops:
+    kms: []
+    gcp_kms: []
+    azure_kv: []
+    hc_vault: []
+    age:
+        - recipient: age1f7ams0n2zy994pzt0u30h8tex6xdcernj59t4d70z4kjsyzrr3wsy87xzk
+          enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
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+            OEV5SUZQNC9uSW8zMVNZOHQrMUQrNm01Tmg0ClF4Wm9uSzRTL055ZnlHUlplUHFO
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+            YSg9QNr++FTdYaQ/TXmYTg0d4kF3yb/xyG1vZMcpZP6+omwN73DSfg==
+            -----END AGE ENCRYPTED FILE-----
+    lastmodified: "2024-05-26T00:55:05Z"
+    mac: ENC[AES256_GCM,data:ix01bcc6i1dTxoYkXbnEbLgMC1bcplI/hZhyO1mFzPAyjfn8h2d4AHUS9CG8UnIDYGky8Wx3BqrC6MmWMtt829m8bS6t83JTPxOEm1pFEa41sUkW9NYuNPL4LQ8X2BzwteQaI8nfscIuwOZ0nK5CmArZneuUookQEszAGX2R0Mw=,iv:mZlEG2pPfKLgZ+6k9iN+NexRzlibYi1HzqBzbrVFj3w=,tag:PIXA+vyOSaZdU0CaI+03/A==,type:str]
+    pgp:
+        - created_at: "2024-05-26T00:53:53Z"
+          enc: |-
+            -----BEGIN PGP MESSAGE-----
+
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+          fp: EF643F59E008414882232C78FFA8331EEB7D6B70
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+          enc: |-
+            -----BEGIN PGP MESSAGE-----
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config/hosts/matrix/sops.nix

@@ -0,0 +1,7 @@
+{ ... }:
+
+{
+  sops = {
+    defaultSopsFile = ./secrets.yaml;
+  };
+}

flake.nix

@@ -159,6 +159,7 @@
           imports = [
             ./config/common
             ./config/proxmox-vm
+            sops-nix.nixosModules.sops
             ./config/hosts/matrix
           ];
         };