Add HVAC modes of climate entities to Prometheus exporter (#62144)

homeassistant/components/prometheus/__init__.py

@@ -11,6 +11,7 @@ from homeassistant import core as hacore
 from homeassistant.components.climate.const import (
     ATTR_CURRENT_TEMPERATURE,
     ATTR_HVAC_ACTION,
+    ATTR_HVAC_MODES,
     ATTR_TARGET_TEMP_HIGH,
     ATTR_TARGET_TEMP_LOW,
     CURRENT_HVAC_ACTIONS,
@@ -393,6 +394,20 @@ class PrometheusMetrics:
                     float(action == current_action)
                 )
 
+        current_mode = state.state
+        available_modes = state.attributes.get(ATTR_HVAC_MODES)
+        if current_mode and available_modes:
+            metric = self._metric(
+                "climate_mode",
+                self.prometheus_cli.Gauge,
+                "HVAC mode",
+                ["mode"],
+            )
+            for mode in available_modes:
+                metric.labels(**dict(self._labels(state), mode=mode)).set(
+                    float(mode == current_mode)
+                )
+
     def _handle_humidifier(self, state):
         humidifier_target_humidity_percent = state.attributes.get(ATTR_HUMIDITY)
         if humidifier_target_humidity_percent:

tests/components/prometheus/test_init.py

@@ -419,7 +419,7 @@ async def test_battery(hass, hass_client):
 
 
 async def test_climate(hass, hass_client):
-    """Test prometheus metrics for battery."""
+    """Test prometheus metrics for climate."""
     assert await async_setup_component(
         hass,
         "conversation",
@@ -459,6 +459,20 @@ async def test_climate(hass, hass_client):
         'friendly_name="Ecobee"} 24.0' in body
     )
 
+    assert (
+        'climate_mode{domain="climate",'
+        'entity="climate.heatpump",'
+        'friendly_name="HeatPump",'
+        'mode="heat"} 1.0' in body
+    )
+
+    assert (
+        'climate_mode{domain="climate",'
+        'entity="climate.heatpump",'
+        'friendly_name="HeatPump",'
+        'mode="off"} 0.0' in body
+    )
+
 
 async def test_humidifier(hass, hass_client):
     """Test prometheus metrics for battery."""