Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!
Grafana seems like another great choice!!! https://grafana.com/grafana/download?platform=docker
Prometheus sounds like a good one!
ELKI sounds like a possible tool for monitoring & alerting
Argus another one but doesn't seem as popular as prometheus
Outlier Detection
pyod
A Python Toolbox for Scalable Outlier Detection (Anomaly Detection)
https://www.datadoghq.com/
https://www.dynatrace.com/
https://dylibso.com/
https://github.com/DataDog/dd-trace-py
References
Awesome Timeseries Anomaly Detection
Top 10 Anomaly Detection Software
Outlier Detection and Anomaly Detection with Machine learning
Introduction to Anomaly Detection
10 Tips for Monitoring Best Practices (Alerting and Notifications)