In this talk we'll present Weave Cortex - a multitenant, horizontally scalable Prometheus as a service.
Our solution turns a lot of the Prometheus architectural assumptions on its head, by marrying a scale-out PromQL query engine with a storage layer based on DynamoDB and S3. We have disaggregated the Prometheus binary into a microservices-style architecture, with separate services for query, ingest, alerting rules and recording rules. By designing all these services as fungible replicas, this solution can be scaled out with ease and failure of any individual replica can be dealt with gracefully.
This multitenant, horizontally scalable Prometheus service forms a core component of Weave Cloud, a hosted management, monitoring and visualisation platform for microservice & containerised applications. This platform is built from 100% open source components, and we're working with the Prometheus community to contribute all the changes we've made back to Prometheus.