使用 Prometheus + Grafana 监控 k8s 上的 Spring Boot 应用

$ curl'http://localhost:8080/actuator/prometheus'-i-X GET

HTTP/1.1 200 OK
Content-Type: text/plain;version=0.0.4;charset=utf-8
Content-Length: 2375# HELP jvm_buffer_memory_used_bytes An estimate of the memory that the Java virtual machine is using for this buffer pool# TYPE jvm_buffer_memory_used_bytes gaugejvm_buffer_memory_used_bytes{id="direct",} 489719.0
jvm_buffer_memory_used_bytes{id="mapped",} 0.0
# HELP jvm_memory_committed_bytes The amount of memory in bytes that is committed for the Java virtual machine to use# TYPE jvm_memory_committed_bytes gaugejvm_memory_committed_bytes{area="heap",id="PS Survivor Space",} 5.1380224E7
jvm_memory_committed_bytes{area="heap",id="PS Old Gen",} 4.86539264E8
jvm_memory_committed_bytes{area="heap",id="PS Eden Space",} 2.11812352E8
jvm_memory_committed_bytes{area="nonheap",id="Metaspace",} 1.62439168E8
jvm_memory_committed_bytes{area="nonheap",id="Code Cache",} 5.4329344E7
jvm_memory_committed_bytes{area="nonheap",id="Compressed Class Space",} 2.4551424E7
# HELP jvm_buffer_total_capacity_bytes An estimate of the total capacity of the buffers in this pool# TYPE jvm_buffer_total_capacity_bytes gaugejvm_buffer_total_capacity_bytes{id="direct",} 489718.0
jvm_buffer_total_capacity_bytes{id="mapped",} 0.0
# HELP jvm_memory_max_bytes The maximum amount of memory in bytes that can be used for memory management# TYPE jvm_memory_max_bytes gaugejvm_memory_max_bytes{area="heap",id="PS Survivor Space",} 5.1380224E7
jvm_memory_max_bytes{area="heap",id="PS Old Gen",} 7.16177408E8
jvm_memory_max_bytes{area="heap",id="PS Eden Space",} 2.31735296E8
jvm_memory_max_bytes{area="nonheap",id="Metaspace",} -1.0
jvm_memory_max_bytes{area="nonheap",id="Code Cache",} 2.5165824E8
jvm_memory_max_bytes{area="nonheap",id="Compressed Class Space",} 1.073741824E9
# HELP jvm_buffer_count_buffers An estimate of the number of buffers in the pool# TYPE jvm_buffer_count_buffers gaugejvm_buffer_count_buffers{id="direct",} 17.0
jvm_buffer_count_buffers{id="mapped",} 0.0
# HELP jvm_memory_used_bytes The amount of used memory# TYPE jvm_memory_used_bytes gaugejvm_memory_used_bytes{area="heap",id="PS Survivor Space",} 5.1139432E7
jvm_memory_used_bytes{area="heap",id="PS Old Gen",} 9.7572216E7
jvm_memory_used_bytes{area="heap",id="PS Eden Space",} 1.47234248E8
jvm_memory_used_bytes{area="nonheap",id="Metaspace",} 1.46403048E8
jvm_memory_used_bytes{area="nonheap",id="Code Cache",} 5.3970112E7
jvm_memory_used_bytes{area="nonheap",id="Compressed Class Space",} 2.1374208E7

apiVersion: v1
kind: Service
metadata:
  labels:
    app: spring-boot-demo-exporter
  name: spring-boot-demo-exporter
  namespace: default
spec:
  ports:
- name: spring-boot-demo-exporter
      port: 8080      protocol: TCP
      targetPort: 8080  selector:
    app: spring-boot-demo
  type: NodePort

scrape_configs:
# ...-  job_name: 'spring-boot-demo'# Prometheus 任务名称，自定义     metrics_path: '/actuator/prometheus'# 指标获取路径     scrape_interval: 5s # 抓取指标的间隔时间     static_configs:
- targets: ['spring-boot-demo-exporter:8080'] # 指标访问入口，即 k8s 集群的 Service

apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  name: spring-boot-exporter
  namespace: default
spec:
  endpoints:
- interval: 30s
# Prometheus Exporter 对应的 Path 的值    path: /actuator/prometheus
# service.yaml 中 Prometheus Exporter 对应的 Port 的 Name 字段的值    port: spring-boot-exporter
  namespaceSelector:
    any: true  selector:
    matchLabels:
# service.yaml 的 Label 字段的值以定位目标 service.yaml      app: spring-boot-demo-exporter