remote prometheus and reconfig server modules

flake.nix

@@ -105,7 +105,8 @@
     let
 
       # Global configuration for my systems
-      globals = rec {
+      globals = let baseName = "masu.rs";
+      in rec {
         user = "noah";
         fullName = "Noah Masur";
         gitName = fullName;
@@ -114,6 +115,14 @@
         mail.imapHost = "imap.purelymail.com";
         mail.smtpHost = "smtp.purelymail.com";
         dotfilesRepo = "git@github.com:nmasur/dotfiles";
+        gitServer = "git.${baseName}";
+        metricsServer = "metrics.${baseName}";
+        prometheusServer = "prom.${baseName}";
+        secretsServer = "vault.${baseName}";
+        streamServer = "stream.${baseName}";
+        contentServer = "cloud.${baseName}";
+        bookServer = "books.${baseName}";
+        downloadServer = "download.${baseName}";
       };
 
       # Common overlays to always use

hosts/flame/default.nix

@@ -10,7 +10,7 @@ inputs.nixpkgs.lib.nixosSystem {
   system = "aarch64-linux";
   specialArgs = { };
   modules = [
-    (removeAttrs globals [ "mail.server" ])
+    globals
     inputs.home-manager.nixosModules.home-manager
     ../../modules/common
     ../../modules/nixos
@@ -43,14 +43,16 @@ inputs.nixpkgs.lib.nixosSystem {
         "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIB+AbmjGEwITk5CK9y7+Rg27Fokgj9QEjgc9wST6MA3s";
 
       # Programs and services
-      caddy.enable = true;
       cloudflare.enable = true; # Proxy traffic with Cloudflare
       dotfiles.enable = true; # Clone dotfiles
-      gaming.minecraft-server.enable = true; # Setup Minecraft server
-      giteaServer = "git.masu.rs";
-      metricsServer = "metrics.masu.rs";
       neovim.enable = true;
-      vaultwardenServer = "vault.masu.rs";
+
+      services.caddy.enable = true;
+      services.grafana.enable = true;
+      services.prometheus.enable = true;
+      services.gitea.enable = true;
+      services.vaultwarden.enable = true;
+      services.minecraft-server.enable = true; # Setup Minecraft server
 
       cloudflareTunnel = {
         enable = true;

hosts/swan/default.nix

@@ -48,14 +48,16 @@ inputs.nixpkgs.lib.nixosSystem {
       theme = { colors = (import ../../colorscheme/gruvbox).dark; };
       nixpkgs.overlays = overlays;
       neovim.enable = true;
-      caddy.enable = true;
       cloudflare.enable = true;
       dotfiles.enable = true;
-      streamServer = "stream.masu.rs";
-      nextcloudServer = "cloud.masu.rs";
-      bookServer = "books.masu.rs";
-      arrServer = "download.masu.rs";
-      samba.enable = true;
+      arrs.enable = true;
+
+      services.caddy.enable = true;
+      services.jellyfin.enable = true;
+      services.nextcloud.enable = true;
+      services.calibre-web.enable = true;
+      services.prometheus.enable = true;
+      services.samba.enable = true;
 
       cloudflareTunnel = {
         enable = true;

modules/common/applications/firefox.nix

@@ -33,7 +33,6 @@
             vimium
             multi-account-containers
             facebook-container
-            temporary-containers
             (lib.mkIf config._1password.enable onepassword-password-manager)
             okta-browser-plugin
             sponsorblock

modules/nixos/gaming/minecraft-server.nix

@@ -9,10 +9,7 @@ let
 
 in {
 
-  options.gaming.minecraft-server.enable =
-    lib.mkEnableOption "Minecraft Server.";
-
-  config = lib.mkIf config.gaming.minecraft-server.enable {
+  config = lib.mkIf config.services.minecraft-server.enable {
 
     unfreePackages = [ "minecraft-server" ];
 

modules/nixos/services/arr.nix

@@ -1,14 +1,15 @@
 { config, lib, ... }: {
 
   options = {
-    arrServer = lib.mkOption {
+    arrs.enable = lib.mkEnableOption "Arr services";
+    downloadServer = lib.mkOption {
       type = lib.types.nullOr lib.types.str;
-      description = "Hostname for arr services";
+      description = "Hostname for download services";
       default = null;
     };
   };
 
-  config = lib.mkIf (config.arrServer != null) {
+  config = lib.mkIf config.arrs.enable {
 
     services = {
       bazarr = {

modules/nixos/services/caddy.nix

@@ -1,7 +1,6 @@
 { config, pkgs, lib, ... }: {
 
   options = {
-    caddy.enable = lib.mkEnableOption "Caddy reverse proxy.";
     caddy.tlsPolicies = lib.mkOption {
       type = lib.types.listOf lib.types.attrs;
       description = "Caddy JSON TLS policies";
@@ -19,10 +18,10 @@
     };
   };
 
-  config = lib.mkIf (config.caddy.enable && config.caddy.routes != [ ]) {
+  config =
+    lib.mkIf (config.services.caddy.enable && config.caddy.routes != [ ]) {
 
       services.caddy = {
-      enable = true;
         adapter = "''"; # Required to enable JSON
         configFile = pkgs.writeText "Caddyfile" (builtins.toJSON {
           apps.http.servers.main = {

modules/nixos/services/calibre.nix

@@ -19,10 +19,9 @@ in {
     };
   };
 
-  config = lib.mkIf (config.bookServer != null) {
+  config = lib.mkIf config.services.calibre-web.enable {
 
     services.calibre-web = {
-      enable = true;
       openFirewall = true;
       options = {
         reverseProxyAuth.enable = false;

modules/nixos/services/default.nix

@@ -9,6 +9,7 @@
     ./cloudflare.nix
     ./gitea.nix
     ./gnupg.nix
+    ./grafana.nix
     ./honeypot.nix
     ./jellyfin.nix
     ./keybase.nix

modules/nixos/services/gitea.nix

@@ -6,23 +6,22 @@ in {
 
   options = {
 
-    giteaServer = lib.mkOption {
-      description = "Hostname for Gitea.";
+    gitServer = lib.mkOption {
+      description = "Hostname for git server (Gitea).";
       type = lib.types.nullOr lib.types.str;
       default = null;
     };
 
   };
 
-  config = lib.mkIf (config.giteaServer != null) {
+  config = lib.mkIf config.services.gitea.enable {
     services.gitea = {
-      enable = true;
       database.type = "sqlite3";
       settings = {
         repository = {
           DEFAULT_PUSH_CREATE_PRIVATE = true;
           DISABLE_HTTP_GIT = false;
-          ACCESS_CONTROL_ALLOW_ORIGIN = config.giteaServer;
+          ACCESS_CONTROL_ALLOW_ORIGIN = config.gitServer;
           ENABLE_PUSH_CREATE_USER = true;
           ENABLE_PUSH_CREATE_ORG = true;
           DEFAULT_BRANCH = "main";
@@ -30,7 +29,7 @@ in {
         server = {
           HTTP_PORT = 3001;
           HTTP_ADDRESS = "127.0.0.1";
-          ROOT_URL = "https://${config.giteaServer}/";
+          ROOT_URL = "https://${config.gitServer}/";
           SSH_PORT = 22;
           START_SSH_SERVER = false; # Use sshd instead
           DISABLE_SSH = false;
@@ -47,7 +46,7 @@ in {
     networking.firewall.allowedTCPPorts = [ 122 ];
 
     caddy.routes = [{
-      match = [{ host = [ config.giteaServer ]; }];
+      match = [{ host = [ config.gitServer ]; }];
       handle = [{
         handler = "reverse_proxy";
         upstreams = [{ dial = "localhost:3001"; }];

modules/nixos/services/grafana.nix

@@ -0,0 +1,24 @@
+{ config, lib, ... }: {
+
+  options.metricsServer = lib.mkOption {
+    type = lib.types.nullOr lib.types.str;
+    description = "Hostname of the metrics server.";
+    default = null;
+  };
+
+  config = lib.mkIf config.services.grafana.enable {
+
+    # Required to fix error in latest nixpkgs
+    services.grafana.settings = { };
+
+    caddy.routes = [{
+      match = [{ host = [ config.metricsServer ]; }];
+      handle = [{
+        handler = "reverse_proxy";
+        upstreams = [{ dial = "localhost:3000"; }];
+      }];
+    }];
+
+  };
+
+}

modules/nixos/services/jellyfin.nix

@@ -8,9 +8,8 @@
     };
   };
 
-  config = lib.mkIf (config.streamServer != null) {
+  config = lib.mkIf config.services.jellyfin.enable {
 
-    services.jellyfin.enable = true;
     services.jellyfin.group = "media";
     users.users.jellyfin = { isSystemUser = true; };
 

modules/nixos/services/nextcloud.nix

@@ -2,15 +2,15 @@
 
   options = {
 
-    nextcloudServer = lib.mkOption {
+    contentServer = lib.mkOption {
       type = lib.types.nullOr lib.types.str;
-      description = "Hostname for Nextcloud";
+      description = "Hostname for personal content system (Nextcloud)";
       default = null;
     };
 
   };
 
-  config = lib.mkIf (config.nextcloudServer != null) {
+  config = lib.mkIf config.services.nextcloud.enable {
 
     services.nextcloud = {
       enable = true;
@@ -21,7 +21,7 @@
       maxUploadSize = "50G";
       config = {
         adminpassFile = config.secrets.nextcloud.dest;
-        extraTrustedDomains = [ config.nextcloudServer ];
+        extraTrustedDomains = [ config.contentServer ];
       };
     };
 
@@ -33,7 +33,7 @@
 
     # Point Caddy to Nginx
     caddy.routes = [{
-      match = [{ host = [ config.nextcloudServer ]; }];
+      match = [{ host = [ config.contentServer ]; }];
       handle = [{
         handler = "reverse_proxy";
         upstreams = [{ dial = "localhost:8080"; }];

modules/nixos/services/prometheus.nix

@@ -1,32 +1,64 @@
-{ config, lib, ... }: {
+{ config, pkgs, lib, ... }: {
 
-  options.metricsServer = lib.mkOption {
+  options.prometheusServer = lib.mkOption {
     type = lib.types.nullOr lib.types.str;
-    description = "Hostname of the Grafana server.";
+    description = "Hostname of the Prometheus server.";
     default = null;
   };
 
-  config = lib.mkIf (config.metricsServer != null) {
+  # If hosting Grafana, host local Prometheus and listen for inbound jobs.
+  # If not hosting Grafana, send remote Prometheus writes to primary host
 
-    services.grafana.enable = true;
-
-    # Required to fix error in latest nixpkgs
-    services.grafana.settings = { };
+  config = lib.mkIf config.services.prometheus.enable {
 
     services.prometheus = {
-      enable = true;
       exporters.node.enable = true;
       scrapeConfigs = [{
         job_name = "local";
         static_configs = [{ targets = [ "127.0.0.1:9100" ]; }];
       }];
+      webExternalUrl = lib.mkIf config.services.grafana.enable
+        "https://${config.prometheusServer}";
+      webConfigFile =
+        lib.mkIf config.services.grafana.enable (pkgs.formats.yaml { }).generate
+        "webconfig.yml" {
+          basic_auth_users = {
+            # Generate password: htpasswd -nBC 10 "" | tr -d ':\n'
+            # Encrypt and place in private/prometheus.age
+            "prometheus" =
+              "$2y$10$r7FWHLHTGPAY312PdhkPEuvb05aGn9Nk1IO7qtUUUjmaDl35l6sLa";
+          };
+        };
+      remoteWrite = lib.mkIf (!config.services.grafana.enable) [{
+        name = config.networking.hostName;
+        url = "https://${config.prometheusServer}";
+        basic_auth = {
+          # Uses password hashed with bcrypt above
+          username = "prometheus";
+          password_file = config.secrets.prometheus.dest;
+        };
+      }];
     };
 
-    caddy.routes = [{
-      match = [{ host = [ config.metricsServer ]; }];
+    # Create credentials file for remote Prometheus push
+    secrets.prometheus = lib.mkIf (!config.services.grafana.enable) {
+      source = ../../../private/prometheus.age;
+      dest = "${config.secretsDirectory}/prometheus";
+      owner = "prometheus";
+      group = "prometheus";
+      permissions = "0440";
+    };
+    systemd.services.prometheus-secret =
+      lib.mkIf (!config.services.grafana.enable) {
+        requiredBy = [ "prometheus.service" ];
+        before = [ "prometheus.service" ];
+      };
+
+    caddy.routes = lib.mkIf config.services.grafana.enable [{
+      match = [{ host = [ config.prometheusServer ]; }];
       handle = [{
         handler = "reverse_proxy";
-        upstreams = [{ dial = "localhost:3000"; }];
+        upstreams = [{ dial = "localhost:9090"; }];
       }];
     }];
 

modules/nixos/services/samba.nix

@@ -1,11 +1,8 @@
 { config, lib, ... }: {
 
-  options = { samba.enable = lib.mkEnableOption "Enable Samba sharing."; };
-
   config = {
 
-    services.samba = lib.mkIf (config.samba.enable) {
-      enable = true;
+    services.samba = lib.mkIf config.services.samba.enable {
       openFirewall = true;
       shares.data = {
         path = "/data";

modules/nixos/services/vaultwarden.nix

@@ -6,19 +6,18 @@ in {
 
   options = {
 
-    vaultwardenServer = lib.mkOption {
-      description = "Hostname for Vaultwarden.";
+    secretsServer = lib.mkOption {
+      description = "Hostname for passwords and secrets (Vaultwarden).";
       type = lib.types.nullOr lib.types.str;
       default = null;
     };
 
   };
 
-  config = lib.mkIf (config.vaultwardenServer != null) {
+  config = lib.mkIf config.services.vaultwarden.enable {
     services.vaultwarden = {
-      enable = true;
       config = {
-        DOMAIN = "https://${config.vaultwardenServer}";
+        DOMAIN = "https://${config.secretsServer}";
         SIGNUPS_ALLOWED = false;
         SIGNUPS_VERIFY = true;
         INVITATIONS_ALLOWED = true;
@@ -47,7 +46,7 @@ in {
     networking.firewall.allowedTCPPorts = [ 3012 ];
 
     caddy.routes = [{
-      match = [{ host = [ config.vaultwardenServer ]; }];
+      match = [{ host = [ config.secretsServer ]; }];
       handle = [{
         handler = "reverse_proxy";
         upstreams = [{ dial = "localhost:8222"; }];

private/prometheus.age

@@ -0,0 +1,12 @@
+-----BEGIN AGE ENCRYPTED FILE-----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+-----END AGE ENCRYPTED FILE-----