From 715cfdffee87e9c9ab84833073109bfdff0c63c1 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Sat, 11 Nov 2023 18:35:24 +0000
Subject: [PATCH 01/28] flake: add 'impermanence'

---
 flake.lock | 17 +++++++++++++++++
 flake.nix  |  7 +++++++
 2 files changed, 24 insertions(+)

diff --git a/flake.lock b/flake.lock
index 83ccfd7..bc23e36 100644
--- a/flake.lock
+++ b/flake.lock
@@ -150,6 +150,22 @@
         "type": "github"
       }
     },
+    "impermanence": {
+      "locked": {
+        "lastModified": 1697303681,
+        "narHash": "sha256-caJ0rXeagaih+xTgRduYtYKL1rZ9ylh06CIrt1w5B4g=",
+        "owner": "nix-community",
+        "repo": "impermanence",
+        "rev": "0f317c2e9e56550ce12323eb39302d251618f5b5",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "ref": "master",
+        "repo": "impermanence",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1719254875,
@@ -214,6 +230,7 @@
         "flake-parts": "flake-parts",
         "futils": "futils",
         "home-manager": "home-manager",
+        "impermanence": "impermanence",
         "nixpkgs": "nixpkgs",
         "nur": "nur",
         "pre-commit-hooks": "pre-commit-hooks",
diff --git a/flake.nix b/flake.nix
index a07ee15..5a5b0ef 100644
--- a/flake.nix
+++ b/flake.nix
@@ -43,6 +43,13 @@
       };
     };
 
+    impermanence = {
+      type = "github";
+      owner = "nix-community";
+      repo = "impermanence";
+      ref = "master";
+    };
+
     nixpkgs = {
       type = "github";
       owner = "NixOS";

From 605934d2303ef0bbc044ddc3bb851e8561ffe189 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Fri, 22 Oct 2021 13:52:04 +0200
Subject: [PATCH 02/28] WIP: nixos: system: add persist

This is the module that takes care of configuring impermanence at the
system level.

WIP:
    * address FIXMEs
    * activate home-manager persistence?
        * set `programs.fuse.userAllowOther = true;` ?
    * point `age` to persisted paths [1] ?
    * make sure all services and modules are persisted correctly...

[1]: https://github.com/lovesegfault/nix-config/commit/b1d18d25b8cc1e50c521020442b907de377a147d
---
 modules/nixos/system/default.nix         |  1 +
 modules/nixos/system/persist/default.nix | 67 ++++++++++++++++++++++++
 2 files changed, 68 insertions(+)
 create mode 100644 modules/nixos/system/persist/default.nix

diff --git a/modules/nixos/system/default.nix b/modules/nixos/system/default.nix
index e6fb25b..3531847 100644
--- a/modules/nixos/system/default.nix
+++ b/modules/nixos/system/default.nix
@@ -9,6 +9,7 @@
     ./language
     ./nix
     ./packages
+    ./persist
     ./podman
     ./polkit
     ./printing
diff --git a/modules/nixos/system/persist/default.nix b/modules/nixos/system/persist/default.nix
new file mode 100644
index 0000000..4c0682c
--- /dev/null
+++ b/modules/nixos/system/persist/default.nix
@@ -0,0 +1,67 @@
+# Ephemeral root configuration
+{ config, inputs, lib, ... }:
+let
+  cfg = config.my.system.persist;
+in
+{
+  imports = [
+    inputs.impermanence.nixosModules.impermanence
+  ];
+
+  options.my.system.persist = with lib; {
+    enable = mkEnableOption "stateless system configuration";
+
+    mountPoint = lib.mkOption {
+      type = types.str;
+      default = "/persistent";
+      example = "/etc/nix/persist";
+      description = ''
+        Which mount point should be used to persist this system's files and
+        directories.
+      '';
+    };
+
+    files = lib.mkOption {
+      type = with types; listOf str;
+      default = [ ];
+      example = [
+        "/etc/nix/id_rsa"
+      ];
+      description = ''
+        Additional files in the root to link to persistent storage.
+      '';
+    };
+
+    directories = lib.mkOption {
+      type = with types; listOf str;
+      default = [ ];
+      example = [
+        "/var/lib/libvirt"
+      ];
+      description = ''
+        Additional directories in the root to link to persistent storage.
+      '';
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    environment.persistence."${cfg.mountPoint}" = {
+      files = [
+        "/etc/machine-id"
+      ]
+      ++ cfg.files
+      ;
+
+      directories = [
+        "/etc/nixos"
+        "/var/log"
+        "/var/lib/systemd/coredump"
+      ]
+      ++ (lib.optionals config.virtualisation.docker.enable [
+        "/var/lib/docker"
+      ])
+      ++ cfg.directories
+      ;
+    };
+  };
+}

From dd92c987b3bb7db6cb8717485f7a4da3308cf2c5 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Fri, 22 Oct 2021 14:05:42 +0200
Subject: [PATCH 03/28] nixos: services: ssh-server: persist host keys

---
 modules/nixos/services/ssh-server/default.nix | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/modules/nixos/services/ssh-server/default.nix b/modules/nixos/services/ssh-server/default.nix
index 9ae0fa8..0cabc6f 100644
--- a/modules/nixos/services/ssh-server/default.nix
+++ b/modules/nixos/services/ssh-server/default.nix
@@ -20,6 +20,14 @@ in
       };
     };
 
+    # Persist SSH keys
+    my.system.persist.files = [
+      "/etc/ssh/ssh_host_ed25519_key"
+      "/etc/ssh/ssh_host_ed25519_key.pub"
+      "/etc/ssh/ssh_host_rsa_key"
+      "/etc/ssh/ssh_host_rsa_key.pub"
+    ];
+
     # Opens the relevant UDP ports.
     programs.mosh.enable = true;
   };

From 8b6621905c20f060b2e117380b29489b7db459e3 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Fri, 22 Oct 2021 14:06:03 +0200
Subject: [PATCH 04/28] nixos: hardware: netowrking persist connections

---
 modules/nixos/hardware/networking/default.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/modules/nixos/hardware/networking/default.nix b/modules/nixos/hardware/networking/default.nix
index f0806fe..51dcfce 100644
--- a/modules/nixos/hardware/networking/default.nix
+++ b/modules/nixos/hardware/networking/default.nix
@@ -22,6 +22,11 @@ in
   config = lib.mkMerge [
     (lib.mkIf cfg.wireless.enable {
       networking.networkmanager.enable = true;
+
+      # Persist NetworkManager files
+      my.system.persist.directories = [
+        "/etc/NetworkManager/system-connections"
+      ];
     })
   ];
 }

From dc9efaef5880a6c2ab7aab03cd33660431873d26 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Fri, 22 Oct 2021 14:06:26 +0200
Subject: [PATCH 05/28] nixos: hardware: bluetooth: persist connections

---
 modules/nixos/hardware/bluetooth/default.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/modules/nixos/hardware/bluetooth/default.nix b/modules/nixos/hardware/bluetooth/default.nix
index e9b1991..efce5c4 100644
--- a/modules/nixos/hardware/bluetooth/default.nix
+++ b/modules/nixos/hardware/bluetooth/default.nix
@@ -18,6 +18,13 @@ in
       services.blueman.enable = true;
     }
 
+    # Persist bluetooth files
+    {
+      my.system.persist.directories = [
+        "/var/lib/bluetooth"
+      ];
+    }
+
     # Support for additional bluetooth codecs
     (lib.mkIf cfg.loadExtraCodecs {
       hardware.pulseaudio = {

From 1686f620a0b4f801692c1b9bdb6642c48440a3ae Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Fri, 22 Oct 2021 14:19:57 +0200
Subject: [PATCH 06/28] nixos: services: blog: persist website data

---
 modules/nixos/services/blog/default.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/modules/nixos/services/blog/default.nix b/modules/nixos/services/blog/default.nix
index e4d2d42..aadc4f0 100644
--- a/modules/nixos/services/blog/default.nix
+++ b/modules/nixos/services/blog/default.nix
@@ -41,5 +41,12 @@ in
 
     # Those are all subdomains, no problem
     my.services.nginx.virtualHosts = hostsInfo;
+
+    my.system.persist.directories = [
+      "/var/www/blog"
+      "/var/www/cv"
+      "/var/www/dev"
+      "/var/www/key"
+    ];
   };
 }

From 830a68755472f54455a8c9d9e346d2fdaaa5f4be Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 3 Nov 2021 14:43:05 +0100
Subject: [PATCH 07/28] nixos: services: calibre-web: persist library

---
 modules/nixos/services/calibre-web/default.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/modules/nixos/services/calibre-web/default.nix b/modules/nixos/services/calibre-web/default.nix
index b7bf9df..8a8af33 100644
--- a/modules/nixos/services/calibre-web/default.nix
+++ b/modules/nixos/services/calibre-web/default.nix
@@ -53,6 +53,11 @@ in
       ];
     };
 
+    my.system.persist.directories = [
+      "/var/lib/${config.services.calibre-web.dataDir}"
+      cfg.libraryPath
+    ];
+
     services.fail2ban.jails = {
       calibre-web = ''
         enabled = true

From 2e0d3751e9a5ea8fa91a163351fc2c2b9c53371d Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 3 Nov 2021 14:43:28 +0100
Subject: [PATCH 08/28] nixos: services: gitea: persist repositories

---
 modules/nixos/services/gitea/default.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/modules/nixos/services/gitea/default.nix b/modules/nixos/services/gitea/default.nix
index 212f59c..20b3871 100644
--- a/modules/nixos/services/gitea/default.nix
+++ b/modules/nixos/services/gitea/default.nix
@@ -131,6 +131,11 @@ in
       ];
     };
 
+    my.system.persist.directories = [
+      config.services.gitea.lfs.contentDir
+      config.services.gitea.repositoryRoot
+    ];
+
     services.fail2ban.jails = {
       gitea = ''
         enabled = true

From 464ce18c2f69ff68aa546f5ab2cb104c3901a384 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Tue, 2 Jul 2024 16:31:54 +0000
Subject: [PATCH 09/28] nixos: services: forgejo: persist repositories

---
 modules/nixos/services/forgejo/default.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/modules/nixos/services/forgejo/default.nix b/modules/nixos/services/forgejo/default.nix
index 18538be..8c36615 100644
--- a/modules/nixos/services/forgejo/default.nix
+++ b/modules/nixos/services/forgejo/default.nix
@@ -147,6 +147,11 @@ in
       ];
     };
 
+    my.system.persist.directories = [
+      config.services.gitea.lfs.contentDir
+      config.services.gitea.repositoryRoot
+    ];
+
     services.fail2ban.jails = {
       forgejo = ''
         enabled = true

From 61a6208087f9f38a69b57a45e04c0a24b1580f34 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 3 Nov 2021 17:12:32 +0100
Subject: [PATCH 10/28] nixos: services: matrix: persist data

---
 modules/nixos/services/matrix/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/nixos/services/matrix/default.nix b/modules/nixos/services/matrix/default.nix
index b958f76..145139f 100644
--- a/modules/nixos/services/matrix/default.nix
+++ b/modules/nixos/services/matrix/default.nix
@@ -253,5 +253,9 @@ in
         config.services.matrix-synapse.dataDir
       ];
     };
+
+    my.system.persist.directories = [
+      config.services.matrix-synapse.dataDir
+    ];
   };
 }

From c0dc0b2a54d0e039c82552a7503194b0d637a15b Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 3 Nov 2021 17:12:42 +0100
Subject: [PATCH 11/28] nixos: services: paperless: persist data

---
 modules/nixos/services/paperless/default.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/modules/nixos/services/paperless/default.nix b/modules/nixos/services/paperless/default.nix
index f62879a..d86be58 100644
--- a/modules/nixos/services/paperless/default.nix
+++ b/modules/nixos/services/paperless/default.nix
@@ -166,5 +166,10 @@ in
         config.services.paperless.mediaDir
       ];
     };
+
+    my.system.persist.directories = [
+      config.services.paperless-ng.dataDir
+      config.services.paperless-ng.mediaDir
+    ];
   };
 }

From 2299ef237ca994753ecb6cca41214b6290792662 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 3 Nov 2021 17:12:58 +0100
Subject: [PATCH 12/28] nixos: services: postgresql-backup: persist data

---
 modules/nixos/services/postgresql-backup/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/nixos/services/postgresql-backup/default.nix b/modules/nixos/services/postgresql-backup/default.nix
index dff5494..3d6c03b 100644
--- a/modules/nixos/services/postgresql-backup/default.nix
+++ b/modules/nixos/services/postgresql-backup/default.nix
@@ -24,5 +24,9 @@ in
         (config.services.postgresqlBackup.location + "/*.prev.sql.gz")
       ];
     };
+
+    my.system.persist.directories = [
+      config.services.postgresqlBackup.location
+    ];
   };
 }

From 7bd66dcafe39c9edb57d9dd510ff521750ab55d9 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 3 Nov 2021 17:13:13 +0100
Subject: [PATCH 13/28] nixos: services: postgresql: persist data

---
 modules/nixos/services/postgresql/default.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/modules/nixos/services/postgresql/default.nix b/modules/nixos/services/postgresql/default.nix
index bbe46d4..cea4c88 100644
--- a/modules/nixos/services/postgresql/default.nix
+++ b/modules/nixos/services/postgresql/default.nix
@@ -18,6 +18,13 @@ in
       };
     })
 
+    # Only persist directory if the actual service is enabled
+    (lib.mkIf config.services.postgresql.enable {
+      my.system.persist.directories = [
+        config.services.postgresql.dataDir
+      ];
+    })
+
     # Taken from the manual
     (lib.mkIf cfg.upgradeScript {
       environment.systemPackages =

From ef57bac9d66d3dd9499e5b5d1a0a75c670414287 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Fri, 5 Nov 2021 14:30:25 +0100
Subject: [PATCH 14/28] nixos: services: indexers: persist data

---
 modules/nixos/services/indexers/default.nix | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/modules/nixos/services/indexers/default.nix b/modules/nixos/services/indexers/default.nix
index 8a42345..332ae30 100644
--- a/modules/nixos/services/indexers/default.nix
+++ b/modules/nixos/services/indexers/default.nix
@@ -33,6 +33,10 @@ in
           port = jackettPort;
         };
       };
+
+      my.system.persist.directories = [
+        config.services.jackett.dataDir
+      ];
     })
 
     (lib.mkIf cfg.nzbhydra.enable {
@@ -45,6 +49,10 @@ in
           port = nzbhydraPort;
         };
       };
+
+      my.system.persist.directories = [
+        config.services.nzbhydra2.dataDir
+      ];
     })
 
     (lib.mkIf cfg.prowlarr.enable {
@@ -58,6 +66,10 @@ in
         };
       };
 
+      my.system.persist.directories = [
+        "/var/lib/${config.systemd.services.prowlarr.serviceConfig.StateDirectory}"
+      ];
+
       services.fail2ban.jails = {
         prowlarr = ''
           enabled = true

From 4e50e841483f8791e06c523fff67eb455610d2d9 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Fri, 5 Nov 2021 15:11:05 +0100
Subject: [PATCH 15/28] nixos: services: jellyfin: persist data

---
 modules/nixos/services/jellyfin/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/nixos/services/jellyfin/default.nix b/modules/nixos/services/jellyfin/default.nix
index f5aaa99..e277b71 100644
--- a/modules/nixos/services/jellyfin/default.nix
+++ b/modules/nixos/services/jellyfin/default.nix
@@ -41,5 +41,9 @@ in
         };
       };
     };
+
+    my.system.persist.directories = [
+      "/var/lib/${config.systemd.services.jellyfin.serviceConfig.StateDirectory}"
+    ];
   };
 }

From 6290554b90d71f2de557ec52ef8b95c6dac075b3 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Fri, 5 Nov 2021 15:11:12 +0100
Subject: [PATCH 16/28] nixos: services: lohr: persist data

---
 modules/nixos/services/lohr/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/nixos/services/lohr/default.nix b/modules/nixos/services/lohr/default.nix
index 21ed93b..64925a2 100644
--- a/modules/nixos/services/lohr/default.nix
+++ b/modules/nixos/services/lohr/default.nix
@@ -107,5 +107,9 @@ in
         };
       };
     };
+
+    my.system.persist.directories = [
+      "/var/lib/${config.systemd.services.lohr.serviceConfig.StateDirectory}"
+    ];
   };
 }

From db03432cea3dbaa9c6eacebabd6a42e8046d1ed1 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Fri, 5 Nov 2021 15:11:23 +0100
Subject: [PATCH 17/28] nixos: services: navidrome: persist data

---
 modules/nixos/services/navidrome/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/nixos/services/navidrome/default.nix b/modules/nixos/services/navidrome/default.nix
index 944a97a..8dd9748 100644
--- a/modules/nixos/services/navidrome/default.nix
+++ b/modules/nixos/services/navidrome/default.nix
@@ -52,5 +52,9 @@ in
         inherit (cfg) port;
       };
     };
+
+    my.system.persist.directories = [
+      "/var/lib/${config.systemd.services.navidrome.serviceConfig.StateDirectory}"
+    ];
   };
 }

From e2bb819b7486630449b5e1373e3f9b161a0782b4 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Fri, 5 Nov 2021 15:11:35 +0100
Subject: [PATCH 18/28] nixos: services: nextcloud: persist data

---
 modules/nixos/services/nextcloud/default.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/modules/nixos/services/nextcloud/default.nix b/modules/nixos/services/nextcloud/default.nix
index bb3169a..ea30a90 100644
--- a/modules/nixos/services/nextcloud/default.nix
+++ b/modules/nixos/services/nextcloud/default.nix
@@ -87,5 +87,10 @@ in
         "${config.services.nextcloud.home}/data/appdata_*/preview"
       ];
     };
+
+    my.system.persist.directories = [
+      config.services.nextcloud.home
+      config.services.nextcloud.datadir
+    ];
   };
 }

From 357276bfb701144685a41338f2c97ada4a510217 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Fri, 5 Nov 2021 15:20:11 +0100
Subject: [PATCH 19/28] nixos: services: podgrab: persist data

---
 modules/nixos/services/podgrab/default.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/modules/nixos/services/podgrab/default.nix b/modules/nixos/services/podgrab/default.nix
index ea89e4e..fad9553 100644
--- a/modules/nixos/services/podgrab/default.nix
+++ b/modules/nixos/services/podgrab/default.nix
@@ -51,5 +51,10 @@ in
         inherit (cfg) port;
       };
     };
+
+    my.system.persist.directories = [
+      config.systemd.services.podgrab.environment.CONFIG
+      config.systemd.services.podgrab.environment.DATA
+    ];
   };
 }

From cd8f0c3c7ff3f50edf35fc0c43b75a57a1c58572 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Fri, 5 Nov 2021 15:21:42 +0100
Subject: [PATCH 20/28] nixos: services: rss-bridge: persist data

---
 modules/nixos/services/rss-bridge/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/nixos/services/rss-bridge/default.nix b/modules/nixos/services/rss-bridge/default.nix
index 52b1030..977b431 100644
--- a/modules/nixos/services/rss-bridge/default.nix
+++ b/modules/nixos/services/rss-bridge/default.nix
@@ -22,5 +22,9 @@ in
       forceSSL = true;
       useACMEHost = config.networking.domain;
     };
+
+    my.system.persist.directories = [
+      config.services.rss-bridge.dataDir
+    ];
   };
 }

From 3a5781ba4b7f849af6610cda7c595e0ad1562586 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Fri, 5 Nov 2021 15:25:44 +0100
Subject: [PATCH 21/28] nixos: services: sabnzbd: persist data

---
 modules/nixos/services/sabnzbd/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/nixos/services/sabnzbd/default.nix b/modules/nixos/services/sabnzbd/default.nix
index 9e0d9c3..86202ab 100644
--- a/modules/nixos/services/sabnzbd/default.nix
+++ b/modules/nixos/services/sabnzbd/default.nix
@@ -24,6 +24,10 @@ in
       };
     };
 
+    my.system.persist.files = [
+      config.services.sabnzbd.configFile
+    ];
+
     services.fail2ban.jails = {
       sabnzbd = ''
         enabled = true

From e1d5f7ce8e754f504a12b4418ff088f353d21ff9 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Fri, 5 Nov 2021 15:25:50 +0100
Subject: [PATCH 22/28] nixos: services: transmission: persist data

---
 modules/nixos/services/transmission/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/nixos/services/transmission/default.nix b/modules/nixos/services/transmission/default.nix
index aeb88b7..e921bfa 100644
--- a/modules/nixos/services/transmission/default.nix
+++ b/modules/nixos/services/transmission/default.nix
@@ -90,5 +90,9 @@ in
       allowedTCPPorts = [ cfg.peerPort ];
       allowedUDPPorts = [ cfg.peerPort ];
     };
+
+    my.system.persist.directories = [
+      config.services.transmission.home
+    ];
   };
 }

From 238a31e98da2e1a584bd051e174a8cf316816507 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Fri, 5 Nov 2021 15:37:51 +0100
Subject: [PATCH 23/28] nixos: services: nginx: persist SSL certificates

---
 modules/nixos/services/nginx/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/nixos/services/nginx/default.nix b/modules/nixos/services/nginx/default.nix
index 7980ad9..4af2680 100644
--- a/modules/nixos/services/nginx/default.nix
+++ b/modules/nixos/services/nginx/default.nix
@@ -465,5 +465,9 @@ in
         }
       ];
     };
+
+    my.system.persist.directories = [
+      config.users.user.acme.home
+    ];
   };
 }

From b51799218dc5196dd24ae03db90ff871088c95cb Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Fri, 5 Nov 2021 15:40:29 +0100
Subject: [PATCH 24/28] nixos: services: monitoring: persist data

---
 modules/nixos/services/monitoring/default.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/modules/nixos/services/monitoring/default.nix b/modules/nixos/services/monitoring/default.nix
index 49919c1..4415cb5 100644
--- a/modules/nixos/services/monitoring/default.nix
+++ b/modules/nixos/services/monitoring/default.nix
@@ -130,5 +130,10 @@ in
         inherit (cfg.grafana) port;
       };
     };
+
+    my.system.persist.directories = [
+      config.services.grafana.dataDir
+      "/var/lib/${config.services.prometheus.stateDir}"
+    ];
   };
 }

From c0c8e65c2270d39308ef6c64146eafe2e36c9d62 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Fri, 5 Nov 2021 15:58:07 +0100
Subject: [PATCH 25/28] nixos: services: pirate: persist data

---
 modules/nixos/services/pirate/default.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/modules/nixos/services/pirate/default.nix b/modules/nixos/services/pirate/default.nix
index e500b54..e0eae1e 100644
--- a/modules/nixos/services/pirate/default.nix
+++ b/modules/nixos/services/pirate/default.nix
@@ -18,6 +18,11 @@ let
       enable = true;
       group = "media";
     };
+
+    # Thankfully those old style services all define users with homes
+    my.system.persist.directories = [
+      config.users.user.${service}.home
+    ];
   };
 
   mkRedirection = service: {

From 3150f9bf22ab944cbf14d118e6ecb0814e4511af Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Fri, 5 Nov 2021 21:51:04 +0100
Subject: [PATCH 26/28] nixos: services: quassel: persist data

---
 modules/nixos/services/quassel/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/nixos/services/quassel/default.nix b/modules/nixos/services/quassel/default.nix
index 695f9e0..0065195 100644
--- a/modules/nixos/services/quassel/default.nix
+++ b/modules/nixos/services/quassel/default.nix
@@ -46,5 +46,9 @@ in
       # Because Quassel does not use the socket, I simply trust its connection
       authentication = "host quassel quassel localhost trust";
     };
+
+    my.system.persist.directories = [
+      config.services.quassel.dataDir
+    ];
   };
 }

From a9a1028164a4f8e1b50ef340489d2899e756e39e Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 3 Nov 2021 14:43:16 +0100
Subject: [PATCH 27/28] WIP: add notes for missing persistence/backup

TODO:
* Look at for more inspiration https://github.com/nix-community/impermanence/pull/108
* Do home-manager
* Common files https://github.com/nix-community/impermanence/issues/10
---
 modules/nixos/services/aria/default.nix              | 1 +
 modules/nixos/services/audiobookshelf/default.nix    | 2 ++
 modules/nixos/services/flood/default.nix             | 2 ++
 modules/nixos/services/grocy/default.nix             | 3 +++
 modules/nixos/services/mealie/default.nix            | 3 +++
 modules/nixos/services/miniflux/default.nix          | 3 +++
 modules/nixos/services/pyload/default.nix            | 2 ++
 modules/nixos/services/tandoor-recipes/default.nix   | 3 +++
 modules/nixos/services/vikunja/default.nix           | 2 ++
 modules/nixos/services/woodpecker/server/default.nix | 2 ++
 modules/nixos/system/persist/default.nix             | 1 +
 11 files changed, 24 insertions(+)

diff --git a/modules/nixos/services/aria/default.nix b/modules/nixos/services/aria/default.nix
index 2d1b3e2..46fd8ee 100644
--- a/modules/nixos/services/aria/default.nix
+++ b/modules/nixos/services/aria/default.nix
@@ -72,5 +72,6 @@ in
     };
 
     # NOTE: unfortunately aria2 does not log connection failures for fail2ban
+    # FIXME: persistence?
   };
 }
diff --git a/modules/nixos/services/audiobookshelf/default.nix b/modules/nixos/services/audiobookshelf/default.nix
index 8c9719d..e4d03c2 100644
--- a/modules/nixos/services/audiobookshelf/default.nix
+++ b/modules/nixos/services/audiobookshelf/default.nix
@@ -35,5 +35,7 @@ in
         };
       };
     };
+
+    # FIXME: persistence?
   };
 }
diff --git a/modules/nixos/services/flood/default.nix b/modules/nixos/services/flood/default.nix
index b95bac5..e1a2b74 100644
--- a/modules/nixos/services/flood/default.nix
+++ b/modules/nixos/services/flood/default.nix
@@ -27,5 +27,7 @@ in
         inherit (cfg) port;
       };
     };
+
+    # FIXME: persistence?
   };
 }
diff --git a/modules/nixos/services/grocy/default.nix b/modules/nixos/services/grocy/default.nix
index 87927d6..4a3183e 100644
--- a/modules/nixos/services/grocy/default.nix
+++ b/modules/nixos/services/grocy/default.nix
@@ -36,5 +36,8 @@ in
       forceSSL = true;
       useACMEHost = config.networking.domain;
     };
+
+    # FIXME: backup
+    # FIXME: persistence
   };
 }
diff --git a/modules/nixos/services/mealie/default.nix b/modules/nixos/services/mealie/default.nix
index 96b9e14..4fa4a6a 100644
--- a/modules/nixos/services/mealie/default.nix
+++ b/modules/nixos/services/mealie/default.nix
@@ -71,5 +71,8 @@ in
         };
       };
     };
+
+    # FIXME: backup
+    # FIXME: persistence
   };
 }
diff --git a/modules/nixos/services/miniflux/default.nix b/modules/nixos/services/miniflux/default.nix
index 5104c8b..448e0af 100644
--- a/modules/nixos/services/miniflux/default.nix
+++ b/modules/nixos/services/miniflux/default.nix
@@ -48,5 +48,8 @@ in
         inherit (cfg) port;
       };
     };
+
+    # FIXME: backup
+    # FIXME: persistence
   };
 }
diff --git a/modules/nixos/services/pyload/default.nix b/modules/nixos/services/pyload/default.nix
index 88889bf..1e5ce61 100644
--- a/modules/nixos/services/pyload/default.nix
+++ b/modules/nixos/services/pyload/default.nix
@@ -54,5 +54,7 @@ in
     };
 
     # FIXME: fail2ban
+    # FIXME: backup
+    # FIXME: persistence
   };
 }
diff --git a/modules/nixos/services/tandoor-recipes/default.nix b/modules/nixos/services/tandoor-recipes/default.nix
index 48ad7a8..a404033 100644
--- a/modules/nixos/services/tandoor-recipes/default.nix
+++ b/modules/nixos/services/tandoor-recipes/default.nix
@@ -82,5 +82,8 @@ in
         };
       };
     };
+
+    # FIXME: backup
+    # FIXME: persistence
   };
 }
diff --git a/modules/nixos/services/vikunja/default.nix b/modules/nixos/services/vikunja/default.nix
index 6e7700f..262c199 100644
--- a/modules/nixos/services/vikunja/default.nix
+++ b/modules/nixos/services/vikunja/default.nix
@@ -99,5 +99,7 @@ in
         config.services.vikunja.settings.files.basepath
       ];
     };
+
+    # FIXME: persistence
   };
 }
diff --git a/modules/nixos/services/woodpecker/server/default.nix b/modules/nixos/services/woodpecker/server/default.nix
index adf533e..5d25284 100644
--- a/modules/nixos/services/woodpecker/server/default.nix
+++ b/modules/nixos/services/woodpecker/server/default.nix
@@ -61,5 +61,7 @@ in
         port = cfg.rpcPort;
       };
     };
+
+    # FIXME: persistence
   };
 }
diff --git a/modules/nixos/system/persist/default.nix b/modules/nixos/system/persist/default.nix
index 4c0682c..18302f3 100644
--- a/modules/nixos/system/persist/default.nix
+++ b/modules/nixos/system/persist/default.nix
@@ -60,6 +60,7 @@ in
       ++ (lib.optionals config.virtualisation.docker.enable [
         "/var/lib/docker"
       ])
+      # FIXME: podman
       ++ cfg.directories
       ;
     };

From d2e9f300cebbb8d44782b679b6b4c3ae03156b3a Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 3 Oct 2024 13:20:42 +0000
Subject: [PATCH 28/28] fixup! WIP: nixos: system: add persist

---
 modules/nixos/system/persist/default.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/modules/nixos/system/persist/default.nix b/modules/nixos/system/persist/default.nix
index 18302f3..7346936 100644
--- a/modules/nixos/system/persist/default.nix
+++ b/modules/nixos/system/persist/default.nix
@@ -55,6 +55,7 @@ in
       directories = [
         "/etc/nixos"
         "/var/log"
+        "/var/lib/nixos"
         "/var/lib/systemd/coredump"
       ]
       ++ (lib.optionals config.virtualisation.docker.enable [