Grafana Stack 📈 2. Collecte des métriques avec OpenTelemetry

docker-compose.yml

---
version: "3.9"

services:
  myapp:
    image: marthym/myapp:latest
    restart: unless-stopped
    read_only: true
    environment:
    - SPRING_MAIN_BANNER-MODE
    - SPRING_PROFILES_ACTIVE
    networks:
      myappnet: {}

  prometheus:
    image: prom/prometheus:v2.44.0
    restart: unless-stopped
    command:
    - --config.file=/etc/prometheus/prometheus.yml
    - --storage.tsdb.path=/prometheus
    - --web.console.libraries=/usr/share/prometheus/console_libraries
    - --web.console.templates=/usr/share/prometheus/consoles
    volumes:
    - /opt/bw/prometheus/:/etc/prometheus/
    - prometheus_data:/prometheus
    networks:
      metrics: {}

  opentelemetry:
    image: otel/opentelemetry-collector-contrib:0.77.0
    user: 0:0
    command:
    - --config=/etc/otel/receivers.yaml
    - --config=/etc/otel/processors.yaml
    - --config=/etc/otel/exporters.yaml
    - --config=/etc/otel/service.yaml
    logging:
      driver: local
      options:
        max-size: 10m
    volumes:
    - /opt/opentelemetry:/etc/otel:ro
    networks:
      myappnet: {}
      metrics: {}

volumes:
  prometheus_data: {}

networks:
  metrics: {}
  myappnet: {}

otel-exporters.yml

exporters:
  prometheus:
    endpoint: '0.0.0.0:9091'
    send_timestamps: true
    enable_open_metrics: true

  logging:
    verbosity: detailed

otel-processors.yml

processors:
  batch:
    send_batch_size: 10000
    send_batch_max_size: 11000
    timeout: 10s

otel-receivers.yml

---

receivers:
  prometheus/myapp:
    config:
      scrape_configs:
        - job_name: 'otel-collector'
          scrape_interval: 15s
          metrics_path: '/actuator/prometheus'
        #   Si vous avez sécurisé la route comme précognisé dans l’article précédent
        #   basic_auth:
        #     username: "otel_collector"
        #     password: "otel_password"
          static_configs:
            - targets: [myappservice:8081]
              labels:
                platform: 'prod'

otel-service.yml

service:
  pipelines:
    metrics:
      receivers: [prometheus/myapp]
      processors: [batch]
      exporters: [prometheus]

prometheus.yml

---

global:
  scrape_interval:     15s # By default, scrape targets every 15 seconds.
  evaluation_interval: 15s # By default, scrape targets every 15 seconds.
  # scrape_timeout is set to the global default (10s).

# A scrape configuration containing exactly one endpoint to scrape:
# Here it's Prometheus itself.
scrape_configs:

  # Le job pour se collecter lui même (optionel)
  - job_name: 'prometheus'
    static_configs:
      - targets: ['localhost:9090']

  # Le job de collecte OpenTelemetry
  - job_name: 'otel-exporter'
    scrape_interval: 15s
    file_sd_configs:
      - files:
        - 'targets/otel_targets.yml'

targets-otel_targets.yml

---

- targets:
  - 'opentelemetry:9091'