Scalable datastore for metrics, events, and real-time analytics.

InfluxDB is an open source time series database optimized for high-write-volume. It's useful for recording metrics, sensor data, events, and performing analytics. It exposes an HTTP API for client interaction and if often used in combination with Grafana to visualize the data.

This add-on comes with Chronograf & Kapacitor pre-installed as well. Which gives you a nice InfluxDB admin interface for managing your users, databases, data retention settings, and lets you peek inside the database using the Data Explorer.