Prometheus is used to scrape metrics from the pod. You have to add Prometheus in your NAIS manifest to enable scrape.
Each app that have scraping enabled can use the default Grafana dashboard nais-app-dashboard, or create theire own.
prometheus:enabled: false # if true the pod will be scraped for metrics by prometheuspath: /metrics # Path to prometheus-metrics
If you are building an app on the JVM you can use Prometheus' own Java client library. Make sure to enable scraping in the NAIS manifest.
We also recommend to export the default metrics.
If you don't want to just relie on pull metrics, you can push data directly to InfluxDB via Sensu.
This is easily done by writing to the Sensu socket.
Remember to format the data as Influxdb syntax.