flake.lock

@@ -1,5 +1,47 @@
 {
   "nodes": {
+    "agenix": {
+      "inputs": {
+        "darwin": "darwin",
+        "home-manager": "home-manager",
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1684153753,
+        "narHash": "sha256-PVbWt3qrjYAK+T5KplFcO+h7aZWfEj1UtyoKlvcDxh0=",
+        "owner": "ryantm",
+        "repo": "agenix",
+        "rev": "db5637d10f797bb251b94ef9040b237f4702cde3",
+        "type": "github"
+      },
+      "original": {
+        "owner": "ryantm",
+        "repo": "agenix",
+        "type": "github"
+      }
+    },
+    "darwin": {
+      "inputs": {
+        "nixpkgs": [
+          "agenix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1673295039,
+        "narHash": "sha256-AsdYgE8/GPwcelGgrntlijMg4t3hLFJFCRF3tL5WVjA=",
+        "owner": "lnl7",
+        "repo": "nix-darwin",
+        "rev": "87b9d090ad39b25b2400029c64825fc2a8868943",
+        "type": "github"
+      },
+      "original": {
+        "owner": "lnl7",
+        "ref": "master",
+        "repo": "nix-darwin",
+        "type": "github"
+      }
+    },
     "flake-utils": {
       "locked": {
         "lastModified": 1667395993,
@@ -17,7 +59,28 @@
     },
     "home-manager": {
       "inputs": {
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": [
+          "agenix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1682203081,
+        "narHash": "sha256-kRL4ejWDhi0zph/FpebFYhzqlOBrk0Pl3dzGEKSAlEw=",
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "rev": "32d3e39c491e2f91152c84f8ad8b003420eab0a1",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "type": "github"
+      }
+    },
+    "home-manager_2": {
+      "inputs": {
+        "nixpkgs": "nixpkgs_2"
       },
       "locked": {
         "lastModified": 1684596126,
@@ -50,6 +113,22 @@
       }
     },
     "nixpkgs": {
+      "locked": {
+        "lastModified": 1677676435,
+        "narHash": "sha256-6FxdcmQr5JeZqsQvfinIMr0XcTyTuR7EXX0H3ANShpQ=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "a08d6979dd7c82c4cef0dcc6ac45ab16051c1169",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
       "locked": {
         "lastModified": 1683286087,
         "narHash": "sha256-xseOd7W7xwF5GOF2RW8qhjmVGrKoBz+caBlreaNzoeI=",
@@ -65,7 +144,7 @@
         "type": "github"
       }
     },
-    "nixpkgs_2": {
+    "nixpkgs_3": {
       "locked": {
         "lastModified": 1684570954,
         "narHash": "sha256-FX5y4Sm87RWwfu9PI71XFvuRpZLowh00FQpIJ1WfXqE=",
@@ -122,8 +201,9 @@
     },
     "root": {
       "inputs": {
-        "home-manager": "home-manager",
+        "agenix": "agenix",
-        "nixpkgs": "nixpkgs_2",
+        "home-manager": "home-manager_2",
+        "nixpkgs": "nixpkgs_3",
         "pwnix": "pwnix"
       }
     }

flake.nix

@@ -7,9 +7,10 @@
       inputs.nixpkgs.follows = "nixpkgs";
       url = git+https://im.badat.dev/bad/pwnix.git;
     };
+    agenix.url = github:ryantm/agenix;
   };
 
-  outputs = args@{ home-manager, nixpkgs, ... }: with nixpkgs; {
+  outputs = args@{ home-manager, nixpkgs, agenix, ... }: with nixpkgs; {
   
       # Configurations for NixOS machines.
       nixosConfigurations =
@@ -32,8 +33,10 @@
             system = "x86_64-linux";
             modules = [
               (mkUserConfig ./system/strawberry)
+              agenix.nixosModules.default
               ./system/strawberry/core.nix
               ./shared/core
+              ./shared/secrets.nix
             ];
             specialArgs = args;
           };

secrets.nix

@@ -0,0 +1,11 @@
+let strawberry = [
+      (builtins.readFile ./system/strawberry/keys/riley.pub)
+      (builtins.readFile ./system/strawberry/keys/root.pub)
+    ];
+    dev-lt-63 = [
+      (builtins.readFile ./system/dev-lt-63/keys/riley.pub)
+    ];
+in {
+  # Secrets for backup cloud storage provider
+  "secret/backblaze.age".publicKeys = strawberry ++ dev-lt-63;
+}

shared/core/backups.nix

@@ -0,0 +1,36 @@
+{ pkgs, lib, config, ... }:
+
+let cfg = config.custom.backups;
+in with lib; {
+
+  options.custom.backups = {
+    enable = mkEnableOption "Automatic backups to Backblaze";
+    bucket = mkOption {
+      type = types.str;
+      default = "ezri-${config.networking.hostName}-backups";
+    };
+  };
+
+  config = lib.mkIf (cfg.enable) {
+    services.duplicity = {
+      enable = true;
+      secretFile = config.age.secrets."backblaze".path;
+      frequency = null; # We set this later
+      root = "/home";
+      fullIfOlderThan = "1M";
+      exclude = [
+        "/home/**/.config"
+        "/home/**/.cache"
+        "/home/**/.cargo"
+        # NixOS configuration, we keep that elsewhere.
+        "/home/**/os"
+      ];
+      targetUrl = "b2://005c7170636d5ef0000000001@${cfg.bucket}";
+    };
+    systemd.services.duplicity.wants = ["network.target"];
+    systemd.timers.duplicity.timerConfig."OnBootSec" = "20m";
+    systemd.timers.duplicity.timerConfig."OnCalendar" = "daily";
+    systemd.timers.duplicity.timerConfig."Persistent" = true;
+  };
+
+}

shared/core/default.nix

@@ -3,6 +3,7 @@
 {
 
   imports = [
+    ./backups.nix
     ./gui.nix
     ./nix.nix
     ./ssh.nix

shared/secrets.nix

@@ -0,0 +1,5 @@
+{
+  age.secrets = {
+    "backblaze".file = ../secret/backblaze.age;
+  };
+}

system/dev-lt-63/keys/riley.pub

@@ -0,0 +1 @@
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDroUHLf56zlYLiMoD1JV5XXZNwY9tftobDttC6hnfiM riley@dev-lt-63

system/strawberry/core.nix

@@ -2,6 +2,7 @@
 
   custom = {
     gui.enable = true;
+    backups.enable = true;
   };
 
   system.stateVersion = "21.11";

system/strawberry/keys/riley.pub

@@ -0,0 +1 @@
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINV6ECtM7dCAWwGX20Is9dbk9B2SHEGZN8bMzwoq5A3W riley@strawberry

system/strawberry/keys/root.pub

@@ -0,0 +1 @@
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILniE+LdfdV9V9+Zj5gJXqKEv1CzQaEySy1u5OdbKa8d root@strawberry