# Prometheus scrape config. Mounted read-only by the root docker-compose.yml.
# Service names resolve over the shared Compose network's DNS.
# Development defaults: no auth, no TLS, no remote_write, no alerting.

global:
  scrape_interval: 15s
  scrape_timeout: 10s
  external_labels:
    monitor: frosty-deno

scrape_configs:
  # The gateway's own counters.
  - job_name: frosty-gateway
    metrics_path: /metrics
    scheme: http
    static_configs:
      - targets:
          - "gateway:8080"
          # Running the gateway on the host instead? Swap in one of:
          #   "host.docker.internal:8080"  Docker Desktop (macOS / Windows)
          #   "localhost:8080"             network_mode: host, or no Docker
        labels:
          service: frosty-gateway

  # Collector health: spans accepted vs refused, exporter queues. Distinguishes
  # "gateway is not exporting" from "collector is dropping".
  - job_name: otel-collector
    metrics_path: /metrics
    scheme: http
    static_configs:
      - targets:
          - "otel-collector:8888"
        labels:
          service: otel-collector

  # RED metrics the spanmetrics connector derives from spans.
  - job_name: otel-spanmetrics
    metrics_path: /metrics
    scheme: http
    static_configs:
      - targets:
          - "otel-collector:8889"
        labels:
          service: frosty-gateway