🧜🏿 👵🏻 🐲 Coletando métricas do aplicativo Spring Boot usando Prometheus e Grafana 😀 🗨️ 🥧

Este artigo cobre todo o ciclo de trabalho com métricas. Primeiro, configure seu aplicativo para fornecer métricas. Configurando o Prometheus para coletar e armazenar métricas. Configurando o Grafana para exibir as métricas coletadas.

Requisitos

1. Maven , mas pode ser adaptado para outros construtores.

2. Docker e docker-compose para executar o Prometheus e o Grafana.

3. Spring boot 2 e superior, no entanto, existem portas para versões anteriores .

Introdução

Spring boot 2 Micrometer . . Prometheus .

github

[ spring initilizr]

spring boot .

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>

actuator

Spring boot , . .

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>

-, actutor 8080 uri /actuator

- github actuator localhost:8080/actuator

, .

{
   "_links":{
      "self":{
         "href":"http://localhost:8080/actuator",
         "templated":false
      },
      "health-path":{
         "href":"http://localhost:8080/actuator/health/{*path}",
         "templated":true
      },
      "health":{
         "href":"http://localhost:8080/actuator/health",
         "templated":false
      },
      "info":{
         "href":"http://localhost:8080/actuator/info",
         "templated":false
      }
   }
}

actuator .

Micrometer - spring boot, , Prometheus .

<dependency>
    <groupId>io.micrometer</groupId>
    <artifactId>micrometer-registry-prometheus</artifactId>
</dependency>

application.yml

Prometheus actuator.

management:
  endpoints:
    web:
      exposure:
        include: health,prometheus
  metrics:
    export:
      prometheus:
        enabled: true
    distribution:
      percentiles-histogram:
        "[http.server.requests]": true

health,prometheus

actuator. Prometheus, `percentiles-histogram`, sla .

, http://localhost:8080/actuator/prometheus

.

# TYPE jvm_memory_committed_bytes gauge
jvm_memory_committed_bytes{area="heap",id="G1 Survivor Space",} 9437184.0
jvm_memory_committed_bytes{area="heap",id="G1 Old Gen",} 9.961472E7
jvm_memory_committed_bytes{area="nonheap",id="Metaspace",} 4.2254336E7
jvm_memory_committed_bytes{area="nonheap",id="CodeHeap 'non-nmethods'",} 2555904.0
# TYPE jvm_gc_live_data_size_bytes gauge
jvm_gc_live_data_size_bytes 0.0
# HELP tomcat_sessions_active_max_sessions  
# TYPE tomcat_sessions_active_max_sessions gauge
tomcat_sessions_active_max_sessions 0.0
# HELP jvm_threads_live_threads The current number of live threads including both daemon and non-daemon threads
# TYPE jvm_threads_live_threads gauge
jvm_threads_live_threads 27.0

, jvm -.

docker-compose.yml

Prometheus Grafana.

version: '3.7'

services:
  grafana:
    build: './config/grafana'
    ports:
      - 3000:3000
    volumes:
      - ./grafana:/var/lib/grafana
    environment:
      - GF_SECURITY_ADMIN_USER=admin
      - GF_SECURITY_ADMIN_PASSWORD=admin
    networks:
      monitoring:
        aliases:
          - grafana
  prometheus:
    image: prom/prometheus
    ports:
      - 9090:9090
    volumes:
      - ./config/prometheus.yml:/etc/prometheus/prometheus.yml
      - ./prometheus:/prometheus
    networks:
      monitoring:
        aliases:
          - prometheus
networks:
  monitoring:

, Grafana , , volume.

grafana , . Dockerfile

Grafana .

FROM grafana/grafana
ADD ./provisioning /etc/grafana/provisioning

prometheus.yml

.

scrape_configs:
  - job_name: 'sample_monitoring'
    scrape_interval: 5s
    metrics_path: '/actuator/prometheus'
    static_configs:
      - targets: ['host.docker.internal:8080']