Export performance metrics from Graphite as Prometheus metrics

Sometimes I have to run two monitoring solutions in parallel. Graphite infrastricture provides some performance metics and I want them to be stored in Prometheus.

Quick run: go run graphite-render-exporter.go

Recommended usage is docker container: docker run mbarzilovich/graphite-render-exporter

Application is configured with environment variables

• GRAPHITE_URL = "http://localhost:8080/render" URL or Graphite render API

• TARGETS = "*.*" Globe to select metrics in Gripthite render API

• POLL_DEPTH = "50s" Time back from now in Graphite render API request ("from=-50s" parameter)

• HTTP_USER = "" Basic authentication user. No basic auth if empty

• HTTP_PASSWORD = "" Basic authentication password. No basic auth if empty

    docker run -d -name graphite-render-exporter -e GRAPHITE_URL="http://example.com/metrics" -e TARGETS="metrics.cpu.*" -e POLL_DEPTH=4min -e HTTP_USER=myuser -e HTTP_PASSWORD=mypassword -p 8081:8081 mbarzilovich/graphite-render-exporter