Merge branch 'dockerize'

Author: penguineer

Dockerfile

@@ -0,0 +1,13 @@
+FROM python:3.8
+
+RUN apt-get update \
+    && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends --no-install-suggests \
+      libsensors5 \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY requirements.txt /
+RUN pip install -r requirements.txt
+
+COPY *.py /
+
+CMD ["python", "-u", "./app.py"]

README.md

@@ -2,6 +2,26 @@
 
 > Watch pre-defined lmsensors values and post them to MQTT topics.
 
+## Configuration
+
+The following environment variables are expected:
+
+* `MQTT_HOST` Name of the MQTT host
+* `MQTT_TOPIC` Prefix for the MQTT topic
+* `SENSORS` expects a JSON sensor configuration in the following form:
+```json
+{
+  "<chip name>": {
+    "features": {
+      "<feature name>": {
+        "label": "<feature label>",
+        "mqtt": "<feature mqtt topic (added to prefix)>"
+      }
+    }
+  }
+}
+```
+
 ## Contributions
 
 Contributions are welcome and should be made via PR.

app.py

@@ -11,6 +11,8 @@
 
 import sensors
 
+import util
+
 running = True
 
 
@@ -54,17 +56,17 @@ def emit_chip_values(mqtt_client, mqtt_prefix, cfg_chips, sensor_chip):
 
 
 def main():
+    global running
     signal.signal(signal.SIGINT, sigint_handler)
 
-    with open("sensors-report-cfg.json", "r") as f:
-        config = json.load(f)
-
     mqtt_config = mqtt.MqttConfig.from_env("MQTT_")
     mqtt_client = mqtt.create_client(mqtt_config)
 
     mqtt_prefix = mqtt_config.prefix
 
-    cfg_chips = config.get('chips', list())
+    cfg_chips = json.loads(util.load_env("SENSORS", "{}"))
+    print("Running with sensors config:")
+    print(json.dumps(cfg_chips, indent=4))
 
     emit_labels(mqtt_client, mqtt_prefix, cfg_chips)
 

docker-compose.yml

@@ -0,0 +1,15 @@
+# Do not forget to create the .env file (see template)
+# before using this container!
+
+version: '2'
+
+services:
+    sensors-report:
+        restart: always
+        build: .
+        env_file:
+            - .env
+        environment:
+          MQTT_HOST: $MQTT_HOST
+          MQTT_PREFIX: $MQTT_PREFIX
+

dotenv.template

@@ -1,2 +1,3 @@
 MQTT_HOST=
 MQTT_PREFIX=
+SENSORS=