prometheus.yml

# prometheus.yml - a docker-compose override that adds 'prometheus' to the stack
#
# once running, head to `localhost:9090` to get access to the Prometheus console.
#
# ref: https://prometheus.io/
# ref: https://docs.docker.com/compose/extends/
#
version: '3'

services:
  web:
    environment:
      CONCOURSE_PROMETHEUS_BIND_IP: "0.0.0.0"
      CONCOURSE_PROMETHEUS_BIND_PORT: "9100"
    ports:
      - '9100:9100'

  prometheus:
    image: prom/prometheus
    entrypoint:
      - /bin/sh
      - -c
      - |
        echo "
        global:
          scrape_interval: '1s'
          evaluation_interval: '1s'

        scrape_configs:
          - job_name: 'concourse'
            static_configs:
              - targets:
                - 'web:9100'
        " > config.yml

          exec prometheus \
            --config.file=config.yml \
            --storage.tsdb.path=/prometheus
    ports:
      - '9090:9090'