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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
I think this is the React demo app I used. Tutorial here full source code here
Sorry, it wasn't Keycloak, it was FusionAuth I used. I think I looked at Keycloak but FusionAuth had better sample apps so I didn't have to spend as much time on the client side. FusionAuth isn't source, but has a free self hosted community edition. It was pretty easy to set up.
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