From e44ec3cba7356080c8fefb9cc78cb82b847cfda2 Mon Sep 17 00:00:00 2001
From: Price Hiller <price@orion-technologies.io>
Date: Sun, 25 Aug 2024 00:28:11 -0500
Subject: [PATCH] refactor(nix): overhaul nixos configurations

---
 flake.nix                                    | 35 +++-----------------
 hosts/luna/default.nix                       |  4 +--
 hosts/luna/modules/monitoring/auditd.nix     |  9 ++---
 hosts/luna/modules/monitoring/grafana.nix    |  9 ++---
 hosts/luna/modules/monitoring/prometheus.nix |  9 ++---
 hosts/luna/modules/services/gitea.nix        |  3 +-
 hosts/luna/modules/services/lakewatch.nix    |  4 +--
 hosts/luna/modules/services/nginx.nix        |  9 ++---
 hosts/luna/os/fs.nix                         | 26 +++++++++++----
 hosts/orion/default.nix                      |  4 +--
 hosts/orion/os/fs.nix                        | 25 ++++++++++----
 secrets/default.nix                          |  4 +--
 12 files changed, 60 insertions(+), 81 deletions(-)

diff --git a/flake.nix b/flake.nix
index 3e719efc..93badd77 100644
--- a/flake.nix
+++ b/flake.nix
@@ -188,25 +188,7 @@
       });
       nixosConfigurations =
         let
-          lib = (import ./lib { lib = nixpkgs.lib; }) // nixpkgs.lib;
-          persist-dir = "/persist";
-          defaults = {
-            config = {
-              environment.etc.machine-id.source = "${persist-dir}/ephemeral/etc/machine-id";
-              environment.persistence.save = {
-                hideMounts = true;
-                persistentStoragePath = "${persist-dir}/save";
-              };
-              environment.persistence.ephemeral = {
-                persistentStoragePath = "${persist-dir}/ephemeral";
-                hideMounts = true;
-                directories = [
-                  "/var/lib"
-                  "/etc/nixos"
-                ];
-              };
-            };
-          };
+          clib = (import ./lib { lib = nixpkgs.lib; });
         in
         {
           orion =
@@ -220,12 +202,9 @@
                 inherit inputs;
                 inherit outputs;
                 inherit hostname;
-                inherit lib;
-                inherit persist-dir;
-                root-disk = "/dev/nvme0n1";
+                inherit clib;
               };
               modules = [
-                defaults
                 ./modules/btrfs-rollback.nix
                 inputs.impermanence.nixosModules.impermanence
                 inputs.agenix.nixosModules.default
@@ -234,7 +213,7 @@
                   config =
                     (import "${self}/secrets" {
                       agenix = false;
-                      inherit lib;
+                      inherit clib;
                     }).${hostname};
                 }
                 ./hosts/${hostname}
@@ -251,13 +230,9 @@
                 inherit inputs;
                 inherit hostname;
                 inherit nixpkgs;
-                inherit lib;
-                inherit persist-dir;
-                root-disk = "/dev/nvme0n1";
-                fqdn = "orion-technologies.io";
+                inherit clib;
               };
               modules = [
-                defaults
                 ./modules/btrfs-rollback.nix
                 inputs.impermanence.nixosModules.impermanence
                 inputs.agenix.nixosModules.default
@@ -268,7 +243,7 @@
                   config =
                     (import "${self}/secrets" {
                       agenix = false;
-                      inherit lib;
+                      inherit clib;
                     }).${hostname};
                 }
                 ./hosts/${hostname}
diff --git a/hosts/luna/default.nix b/hosts/luna/default.nix
index 6d24c80a..7315d0c7 100644
--- a/hosts/luna/default.nix
+++ b/hosts/luna/default.nix
@@ -1,7 +1,7 @@
-{ lib, ... }:
+{ clib, ... }:
 {
   imports = (
-    lib.recurseFilesInDirs [
+    clib.recurseFilesInDirs [
       ./os
       ./modules
     ] ".nix"
diff --git a/hosts/luna/modules/monitoring/auditd.nix b/hosts/luna/modules/monitoring/auditd.nix
index bcf65abe..1c26f76f 100644
--- a/hosts/luna/modules/monitoring/auditd.nix
+++ b/hosts/luna/modules/monitoring/auditd.nix
@@ -1,9 +1,4 @@
-{
-  persist-dir,
-  pkgs,
-  config,
-  ...
-}:
+{ pkgs, config, ... }:
 let
   laurel-user = "_laurel";
 in
@@ -145,7 +140,7 @@ in
     "-a always,exit -F arch=b64 -S open -F dir=/opt -F success=0 -F key=unauthedfileaccess"
     "-a always,exit -F arch=b64 -S open -F dir=/boot -F success=0 -F key=unauthedfileaccess"
     "-a always,exit -F arch=b64 -S open -F dir=/nix -F success=0 -F key=unauthedfileaccess"
-    "-a always,exit -F arch=b64 -S open -F dir=${persist-dir} -F success=0 -F key=unauthedfileaccess"
+    "-a always,exit -F arch=b64 -S open -F dir=/persist -F success=0 -F key=unauthedfileaccess"
 
     # File deletion events by users
     "-a always,exit -F arch=b64 -S rmdir -S unlink -S unlinkat -S rename -S renameat -F auid>=1000 -F auid!=-1 -F key=delete"
diff --git a/hosts/luna/modules/monitoring/grafana.nix b/hosts/luna/modules/monitoring/grafana.nix
index d9dc5137..8462a0a6 100644
--- a/hosts/luna/modules/monitoring/grafana.nix
+++ b/hosts/luna/modules/monitoring/grafana.nix
@@ -1,11 +1,6 @@
-{
-  config,
-  pkgs,
-  fqdn,
-  ...
-}:
+{ config, ... }:
 let
-  grafana_host = "grafana.${fqdn}";
+  grafana_host = "grafana.orion-technologies.io";
 in
 {
   services = {
diff --git a/hosts/luna/modules/monitoring/prometheus.nix b/hosts/luna/modules/monitoring/prometheus.nix
index 555dad7c..8db01250 100644
--- a/hosts/luna/modules/monitoring/prometheus.nix
+++ b/hosts/luna/modules/monitoring/prometheus.nix
@@ -1,11 +1,6 @@
-{
-  config,
-  fqdn,
-  pkgs,
-  ...
-}:
+{ config, pkgs, ... }:
 let
-  prometheus_host = "prometheus.${fqdn}";
+  prometheus_host = "prometheus.orion-technologies.io";
 in
 {
   services = {
diff --git a/hosts/luna/modules/services/gitea.nix b/hosts/luna/modules/services/gitea.nix
index 8ed6f9af..7be50356 100644
--- a/hosts/luna/modules/services/gitea.nix
+++ b/hosts/luna/modules/services/gitea.nix
@@ -1,13 +1,12 @@
 {
   config,
-  fqdn,
   inputs,
   pkgs,
   lib,
   ...
 }:
 let
-  gitea_host = "git.${fqdn}";
+  gitea_host = "git.orion-technologies.io";
   # TODO: Move this docker image out to a separate package and NixOS Module
   # Huge thank you to https://icewind.nl/entry/gitea-actions-nix/ -- wouldn't have figured this out
   # without that post 🙂
diff --git a/hosts/luna/modules/services/lakewatch.nix b/hosts/luna/modules/services/lakewatch.nix
index 83f11840..831f0db3 100644
--- a/hosts/luna/modules/services/lakewatch.nix
+++ b/hosts/luna/modules/services/lakewatch.nix
@@ -1,4 +1,4 @@
-{ config, fqdn, ... }:
+{ config, ... }:
 {
   services.lakewatch-api = {
     enable = true;
@@ -14,7 +14,7 @@
       passwordFile = config.age.secrets.lakewatch-db-pass.path;
     };
   };
-  services.nginx.virtualHosts."lakewatch.${fqdn}" = {
+  services.nginx.virtualHosts."lakewatch.orion-technologies.io" = {
     forceSSL = true;
     enableACME = true;
     locations."/".proxyPass = "http://${config.services.lakewatch-api.host}:${builtins.toString config.services.lakewatch-api.port}";
diff --git a/hosts/luna/modules/services/nginx.nix b/hosts/luna/modules/services/nginx.nix
index 48cb295a..a33d719c 100644
--- a/hosts/luna/modules/services/nginx.nix
+++ b/hosts/luna/modules/services/nginx.nix
@@ -1,9 +1,4 @@
-{
-  inputs,
-  pkgs,
-  fqdn,
-  ...
-}:
+{ inputs, pkgs, ... }:
 {
   services.nginx = {
     enable = true;
@@ -19,7 +14,7 @@
   };
 
   services.nginx.virtualHosts = {
-    "blog.${fqdn}" = {
+    "blog.orion-technologies.io" = {
       forceSSL = true;
       enableACME = true;
       globalRedirect = "price-hiller.com";
diff --git a/hosts/luna/os/fs.nix b/hosts/luna/os/fs.nix
index 887782ee..e7cfdc00 100644
--- a/hosts/luna/os/fs.nix
+++ b/hosts/luna/os/fs.nix
@@ -1,10 +1,22 @@
+{ lib, ... }:
+let
+  root-disk = "/dev/nvme0n1";
+  persist-dir = "/persist";
+in
 {
-  lib,
-  root-disk,
-  persist-dir,
-  ...
-}:
-{
+  environment.etc.machine-id.source = "${persist-dir}/ephemeral/etc/machine-id";
+  environment.persistence.save = {
+    hideMounts = true;
+    persistentStoragePath = "${persist-dir}/save";
+  };
+  environment.persistence.ephemeral = {
+    persistentStoragePath = "${persist-dir}/ephemeral";
+    hideMounts = true;
+    directories = [
+      "/var/lib"
+      "/etc/nixos"
+    ];
+  };
   services = {
     fstrim.enable = true;
     btrfs.autoScrub = {
@@ -12,7 +24,7 @@
       fileSystems = [
         "/"
         "/nix"
-        "/persist"
+        "${persist-dir}"
       ];
     };
     snapper = {
diff --git a/hosts/orion/default.nix b/hosts/orion/default.nix
index f39732d5..b6c9c21e 100644
--- a/hosts/orion/default.nix
+++ b/hosts/orion/default.nix
@@ -1,7 +1,7 @@
-{ pkgs, lib, ... }:
+{ pkgs, clib, ... }:
 {
   imports = (
-    lib.recurseFilesInDirs [
+    clib.recurseFilesInDirs [
       ./os
       ./modules
     ] ".nix"
diff --git a/hosts/orion/os/fs.nix b/hosts/orion/os/fs.nix
index 7c054c13..25b80bb7 100644
--- a/hosts/orion/os/fs.nix
+++ b/hosts/orion/os/fs.nix
@@ -1,9 +1,8 @@
-{
-  lib,
-  root-disk,
-  persist-dir,
-  ...
-}:
+{ lib, ... }:
+let
+  root-disk = "/dev/nvme0n1";
+  persist-dir = "/persist";
+in
 {
   services = {
     fstrim.enable = true;
@@ -17,6 +16,20 @@
     };
   };
 
+  environment.etc.machine-id.source = "${persist-dir}/ephemeral/etc/machine-id";
+  environment.persistence.save = {
+    hideMounts = true;
+    persistentStoragePath = "${persist-dir}/save";
+  };
+  environment.persistence.ephemeral = {
+    persistentStoragePath = "${persist-dir}/ephemeral";
+    hideMounts = true;
+    directories = [
+      "/var/lib"
+      "/etc/nixos"
+    ];
+  };
+
   fileSystems."${persist-dir}".neededForBoot = true;
 
   disko.devices = {
diff --git a/secrets/default.nix b/secrets/default.nix
index a038940e..3e840044 100644
--- a/secrets/default.nix
+++ b/secrets/default.nix
@@ -1,6 +1,6 @@
 {
   agenix ? false,
-  lib ? import ../lib { },
+  clib ? import ../clib { },
 }:
 let
   masterKeys = [
@@ -54,7 +54,7 @@ if agenix then
 else
   (builtins.mapAttrs (
     host: secrets:
-    (lib.recursiveMerge (
+    (clib.recursiveMerge (
       builtins.map (secretName: { age.secrets.${secretName}.file = ./${secrets.${secretName}}; }) (
         builtins.attrNames hosts.${host}
       )