Prometheus for Spring Boot

快速接入

• 引入Jar包（pom.xml）

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
    <groupId>io.micrometer</groupId>
    <artifactId>micrometer-registry-prometheus</artifactId>
</dependency>

• 配置metrics（application.properties）

#Metrics related configurations
management.endpoint.metrics.enabled=true
management.endpoints.web.exposure.include=*
management.endpoint.prometheus.enabled=true
management.metrics.export.prometheus.enabled=true

• 查看指標 http://localhost:8080/actuator/prometheus

prometheus監控指標

• 修改Prometheus配置（prometheus.yml）

#Global configurations
global:
  scrape_interval:     5s # Set the scrape interval to every 5 seconds.
  evaluation_interval: 5s # Evaluate rules every 5 seconds.
scrape_configs:
  - job_name: 'spring-boot'
    metrics_path: '/actuator/prometheus'
    static_configs:
      - targets: ['localhost:8080']

• 重啓Prometheus

./perometheus --config.file=prometheus.yml

配置Grafana

• 配置指標jvm_memory_committed_bytes

image.png

• 再配置更多指標
  • jvm_threads_states_threads
  • jvm_memory_used_bytes
  • process_cpu_usage
  • rate(http_server_requests_seconds_sum[5m])
  • jvm_gc_pause_seconds_count

參考

• Monitoring Using Spring Boot 2.0, Prometheus, and Grafana (Part 2 — Exposing Metrics)
• Set Up and Integrate Prometheus With Grafana for Monitoring
• https://prometheus.io/docs/prometheus/latest/querying/functions/#rate