LoadDensity

LoadDensity local lab

A docker-compose file that brings up every target the examples need:

Service	Port	Purpose
httpbin	:8080	Generic HTTP echo server.
mosquitto	:1883	MQTT broker for examples/mqtt_pubsub.py.
redis	:6379	Redis for examples/redis_load.json.
kafka	:9092	Single-broker Kafka cluster (KRaft mode).
prometheus	:9090	Scrapes the LoadDensity Prometheus exporter on the host.

Quick start

docker compose -f docker/docker-compose.yml up -d
# … run examples …
docker compose -f docker/docker-compose.yml down -v

Notes

• The Prometheus job scrapes host.docker.internal:9646, which is the default port of start_prometheus_exporter. On Linux without host.docker.internal, point the job at your host IP instead.
• Kafka uses KRaft (no Zookeeper) and exposes a single broker — good enough for examples, not for production load.
• mosquitto.conf allows anonymous connections; tighten before exposing the broker.

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