query-orchestration/cmd/metricsExample_test

Prometheus sample code

This is a sample main that will use the custom doczy prometheus library to expose some typical metrics.

task compose:up:test (to start prometheus) Then run go run ./cmd/metricsExample_test/main.go to start the metrics example server.

Prometheus console is at http://localhost:9090/

Example queries for the

Use these queries in the prometheus console to see the metrics from the sample main.go

Total requests per endpoint (rate over 5m)

rate(myapp_api_api_requests_total[5m])

Request rate by status code

sum by (status) (rate(myapp_api_api_requests_total[5m]))

Request rate by method

sum by (method) (rate(myapp_api_api_requests_total[5m]))

Current active users by type

myapp_api_active_users

Total active users across all types

sum(myapp_api_active_users)

Histograms

95th percentile request duration by endpoint

histogram_quantile(0.95, sum(rate(myapp_api_request_duration_seconds_bucket[5m])) by (endpoint, le))

Average request duration

rate(myapp_api_request_duration_seconds_sum[5m]) / rate(myapp_api_request_duration_seconds_count[5m])

Request duration heatmap (if you have Grafana)

myapp_api_request_duration_seconds_bucket