diff --git a/hosts/homeserver/configuration.nix b/hosts/homeserver/configuration.nix
--- a/hosts/homeserver/configuration.nix
+++ b/hosts/homeserver/configuration.nix
@@ -8,6 +8,7 @@
   imports =
     [ # Include the results of the hardware scan.
       ./hardware-configuration.nix
+      ./services/homeassistant.nix
     ];
 
   # Bootloader.
@@ -97,9 +98,11 @@
 
   # Open ports in the firewall.
   # networking.firewall.allowedTCPPorts = [ ... ];
-  # networking.firewall.allowedUDPPorts = [ ... ];
+  # networking.firewall.allowedUDPPorts = [ 5353 1900 ];
   # Or disable the firewall altogether.
-  # networking.firewall.enable = false;
+
+  # Be carefull - home asssistent needs weird ports
+  networking.firewall.enable = false;
 
   # This value determines the NixOS release from which the default
   # settings for stateful data, like file locations and database versions
diff --git a/hosts/homeserver/services/homeassistant.nix b/hosts/homeserver/services/homeassistant.nix
new file mode 100644
--- /dev/null
+++ b/hosts/homeserver/services/homeassistant.nix
@@ -0,0 +1,41 @@
+{
+  virtualisation.oci-containers = {
+    backend = "docker";
+
+    containers = {
+      homeassistant = {
+        image = "ghcr.io/home-assistant/home-assistant:stable";
+
+        volumes = [
+          "/srv/apps/homeassistant/config:/config"
+          "/etc/localtime:/etc/localtime:ro"
+          "/run/dbus:/run/dbus:ro"
+        ];
+
+        extraOptions = [
+          "--network=host"
+          "--privileged"
+        ];
+
+        autoStart = true;
+      };
+
+      mosquitto = {
+        image = "docker.io/eclipse-mosquitto:2";
+
+        volumes = [
+          "/srv/apps/mosquitto/config:/mosquitto/config"
+          "/srv/apps/mosquitto/data:/mosquitto/data"
+          "/srv/apps/mosquitto/log:/mosquitto/log"
+        ];
+
+        ports = [
+          "1883:1883"
+          "9001:9001"
+        ];
+
+        autoStart = true;
+      };
+    };
+  };
+}