test: improve mosquitto startup, add container_name, env creds, explicit network

test/docker-compose.yml

@@ -23,14 +23,18 @@ services:
 
   mosquitto:
     image: eclipse-mosquitto:2.0
+    container_name: mosquitto
     ports:
       - "1883:1883"
     volumes:
       - mosquitto_data:/mosquitto/data
       - mosquitto_log:/mosquitto/log
       - ./mosquitto.conf:/mosquitto/config/mosquitto.conf
+    environment:
+      - MOSQ_USER=testuser
+      - MOSQ_PASS=testpass
     # ensure a password file exists (in the writable data volume) and start mosquitto with our config
-    command: sh -c "mosquitto_passwd -b /mosquitto/data/passwordfile testuser testpass >/dev/null 2>&1 || true; /usr/sbin/mosquitto -c /mosquitto/config/mosquitto.conf"
+    command: sh -c "mkdir -p /mosquitto/data; mosquitto_passwd -b /mosquitto/data/passwordfile ${MOSQ_USER} ${MOSQ_PASS} >/dev/null 2>&1 || true; chown -R mosquitto:mosquitto /mosquitto/data || true; /usr/sbin/mosquitto -c /mosquitto/config/mosquitto.conf"
     healthcheck:
       test: ["CMD", "sh", "-c", "nc -z localhost 1883 || exit 1"]
       interval: 2s
@@ -45,8 +49,8 @@ services:
     environment:
       - MQTT_BROKER=mosquitto:1883
       - MQTT_TOPIC=lambdaiot
-      - MQTT_USERNAME=testuser
+      - MQTT_USERNAME=${MOSQ_USER}
-      - MQTT_PASSWORD=testpass
+      - MQTT_PASSWORD=${MOSQ_PASS}
     command: sh -c "pip install paho-mqtt && python subscribe.py"
     depends_on:
       - mosquitto
@@ -54,3 +58,7 @@ services:
 volumes:
   mosquitto_data:
   mosquitto_log:
+
+networks:
+  default:
+    name: lambdaiot_test_net