♻️ refactor some monitoring configs

hosts/aristotle/configuration.nix

@@ -29,27 +29,9 @@
     firewall.enable = false;
   };
 
-  # Enable the OpenSSH daemon.
-  services.openssh.enable = true;
   users.users.root.openssh.authorizedKeys.keys = [
     "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJ0mE4MyMnfd1b2nlBJT7kpZ6Vov+ILuGNfzdp5ZBNQe walkah@walkah.net"
   ];
 
   environment.systemPackages = with pkgs; [ libraspberrypi raspberrypi-eeprom ];
-
-  services = {
-    prometheus = {
-      enable = true;
-      port = 9090;
-      exporters = {
-        node = {
-          enable = true;
-          enabledCollectors = [ "systemd" ];
-          openFirewall = true;
-          port = 9100;
-        };
-      };
-    };
-    tailscale = { enable = true; };
-  };
 }

hosts/plato/configuration.nix

@@ -117,7 +117,6 @@ in
   };
 
   services = {
-    openssh.enable = true;
     borgbackup.jobs."borgbase" = {
       paths = [
         "/var/backup"
@@ -151,16 +150,6 @@ in
       };
     };
     prometheus = {
-      enable = true;
-      port = 9090;
-      exporters = {
-        node = {
-          enable = true;
-          enabledCollectors = [ "systemd" ];
-          port = 9100;
-        };
-      };
-
       scrapeConfigs = [
         {
           job_name = "node";
@@ -189,7 +178,6 @@ in
       ];
     };
     tailscale = {
-      enable = true;
       useRoutingFeatures = "server";
     };
   };

hosts/socrates/configuration.nix

@@ -62,21 +62,5 @@
       recommendedGzipSettings = true;
       recommendedProxySettings = true;
     };
-    openssh = { enable = true; };
-    prometheus = {
-      enable = true;
-      port = 9090;
-      listenAddress = "100.103.57.96";
-      exporters = {
-        node = {
-          enable = true;
-          enabledCollectors = [ "systemd" ];
-          openFirewall = true;
-          port = 9100;
-          listenAddress = "100.103.57.96";
-        };
-      };
-    };
-    tailscale = { enable = true; };
   };
 }

modules/base/nixos.nix

@@ -1,6 +1,6 @@
 { config, ... }: {
 
-  imports = [ ./common.nix ];
+  imports = [ ./common.nix ../monitoring ];
 
   nix = {
     gc = {
@@ -20,6 +20,11 @@
     mosh.enable = true;
   };
 
+  services = {
+    openssh.enable = true;
+    tailscale.enable = true;
+  };
+
   system = {
     autoUpgrade = {
       enable = true;

modules/monitoring/default.nix

@@ -0,0 +1,17 @@
+_:
+
+{
+  services = {
+    prometheus = {
+      enable = true;
+      port = 9090;
+      exporters = {
+        node = {
+          enable = true;
+          enabledCollectors = [ "systemd" ];
+          port = 9100;
+        };
+      };
+    };
+  };
+}