Grafana

Alert rule: temperature drift in a fermentation tank

# Grafana Alert Rule (YAML, provisioning)
apiVersion: 1
groups:
  - orgId: 1
    name: head-brewer-alerts
    folder: Brewery
    interval: 30s
    rules:
      - uid: tank-temp-drift
        title: Tank temperature drifts from target
        condition: B
        data:
          - refId: A
            datasourceUid: influxdb-tanks
            model:
              query: |
                from(bucket: "tanks")
                  |> range(start: -15m)
                  |> filter(fn: (r) =>
                    r._measurement == "temperature" and
                    abs(r.actual - r.target) > 2.0)
                  |> mean()
          - refId: B
            type: threshold
            settings:
              expression: A > 0
        for: 10m
        labels:
          severity: warning
          team: head-brewer
        annotations:
          summary: "Tank {{ $labels.tank }} drifts by {{ $value }}°C"
        # → Alertmanager → Slack #brewery-alerts

Grafana stack with InfluxDB data source

services:
  grafana:
    image: grafana/grafana:13.0.1
    container_name: grafana
    restart: unless-stopped
    ports: ["3000:3000"]
    volumes:
      - grafana_data:/var/lib/grafana
      - ./provisioning:/etc/grafana/provisioning:ro
    environment:
      - GF_SERVER_ROOT_URL=https://dashboards.werder-brewery.com
      - GF_SECURITY_ADMIN_PASSWORD=${GRAFANA_ADMIN_PASS}
      - GF_AUTH_ANONYMOUS_ENABLED=false
      - GF_INSTALL_PLUGINS=grafana-clock-panel,grafana-piechart-panel
    networks: [observability, frontend]

  influxdb:
    image: influxdb:2.7
    container_name: influxdb
    restart: unless-stopped
    environment:
      - DOCKER_INFLUXDB_INIT_MODE=setup
      - DOCKER_INFLUXDB_INIT_USERNAME=admin
      - DOCKER_INFLUXDB_INIT_PASSWORD=${INFLUX_ADMIN_PASS}
      - DOCKER_INFLUXDB_INIT_ORG=werder-brewery
      - DOCKER_INFLUXDB_INIT_BUCKET=tanks
      - DOCKER_INFLUXDB_INIT_RETENTION=90d
    volumes:
      - influxdb_data:/var/lib/influxdb2
    networks: [observability]

volumes:
  grafana_data:
  influxdb_data:

networks:
  observability:
  frontend:
    external: true