一个 Spring 应用程序性能监控方案

ゝ一纸荒年。 2022-08-30 11:15 203阅读 0赞

![image-20210719164653274][]

Actutaor 内部集成了 Micrometer，可以对应用程序进行监控和管理。Actuator 内置了非常多的 endpoint（health、info、beans、metrics、shutdown等），而且允许创建自定义的 endpoint。

Prometheus 通过读 actuator 暴露的 endpoint，将应用的程序的运行参数按照时间序列持久化。

Grafana 读取 prometheus 存户的数据，渲染到 UI 界面，对外展示。

### 使用方式 ###

加入依赖:

implementation 'org.springframework.boot:spring-boot-starter-actuator'

暴露全部 endpoint：

management.endpoints.web.exposure.include= *

启动 spring 应用程序

./gradlew bootRun

查看 Actutaor 暴露的全部 endpoints。

curl -X GET  http://localhost:8080/actuator | jq

{ 
      "_links": { 
        "self": { 
          "href": "http://localhost:8080/actuator",
          "templated": false
        },
        "beans": { 
          "href": "http://localhost:8080/actuator/beans",
          "templated": false
        },
        "caches": { 
          "href": "http://localhost:8080/actuator/caches",
          "templated": false
        },
        "caches-cache": { 
          "href": "http://localhost:8080/actuator/caches/{cache}",
          "templated": true
        },
        "health": { 
          "href": "http://localhost:8080/actuator/health",
          "templated": false
        },
        "health-path": { 
          "href": "http://localhost:8080/actuator/health/{*path}",
          "templated": true
        },
        "info": { 
          "href": "http://localhost:8080/actuator/info",
          "templated": false
        },
        "conditions": { 
          "href": "http://localhost:8080/actuator/conditions",
          "templated": false
        },
        "configprops": { 
          "href": "http://localhost:8080/actuator/configprops",
          "templated": false
        },
        "env": { 
          "href": "http://localhost:8080/actuator/env",
          "templated": false
        },
        "env-toMatch": { 
          "href": "http://localhost:8080/actuator/env/{toMatch}",
          "templated": true
        },
        "loggers": { 
          "href": "http://localhost:8080/actuator/loggers",
          "templated": false
        },
        "loggers-name": { 
          "href": "http://localhost:8080/actuator/loggers/{name}",
          "templated": true
        },
        "heapdump": { 
          "href": "http://localhost:8080/actuator/heapdump",
          "templated": false
        },
        "threaddump": { 
          "href": "http://localhost:8080/actuator/threaddump",
          "templated": false
        },
        "metrics-requiredMetricName": { 
          "href": "http://localhost:8080/actuator/metrics/{requiredMetricName}",
          "templated": true
        },
        "metrics": { 
          "href": "http://localhost:8080/actuator/metrics",
          "templated": false
        },
        "scheduledtasks": { 
          "href": "http://localhost:8080/actuator/scheduledtasks",
          "templated": false
        },
        "mappings": { 
          "href": "http://localhost:8080/actuator/mappings",
          "templated": false
        }
      }
    }

单独访问某个资源的统计信息：比如：metrics

curl -X GET http://localhost:8080/actuator/metrics | jq

{ 
      "names": [
        "http.server.requests",
        "jvm.buffer.count",
        "jvm.buffer.memory.used",
        "jvm.buffer.total.capacity",
        "jvm.classes.loaded",
        "jvm.classes.unloaded",
        "jvm.gc.live.data.size",
        "jvm.gc.max.data.size",
        "jvm.gc.memory.allocated",
        "jvm.gc.memory.promoted",
        "jvm.gc.pause",
        "jvm.memory.committed",
        "jvm.memory.max",
        "jvm.memory.used",
        "jvm.threads.daemon",
        "jvm.threads.live",
        "jvm.threads.peak",
        "jvm.threads.states",
        "logback.events",
        "process.cpu.usage",
        "process.files.max",
        "process.files.open",
        "process.start.time",
        "process.uptime",
        "system.cpu.count",
        "system.cpu.usage",
        "system.load.average.1m",
        "tomcat.sessions.active.current",
        "tomcat.sessions.active.max",
        "tomcat.sessions.alive.max",
        "tomcat.sessions.created",
        "tomcat.sessions.expired",
        "tomcat.sessions.rejected"
      ]
    }

查看 cpu 占用大小：

curl -X GET http://localhost:8080/actuator/metrics/system.cpu.usage | jq

{ 
      "name": "system.cpu.usage",
      "description": "The \"recent cpu usage\" for the whole system",
      "baseUnit": null,
      "measurements": [
        { 
          "statistic": "VALUE",
          "value": 0
        }
      ],
      "availableTags": []
    }

### Prometheus 读 Actuator 采集的应用程序的运行状况 ###

endpoint 返回的结果是json形式的，promethues 只识别键值对，因此需要将 json 转化问 key-value 形式。

添加依赖：

implementation 'io.micrometer:micrometer-registry-prometheus:1.7.1'

获取 metrics

curl -X GET http://localhost:8080/actuator/prometheus

process_uptime_seconds 704.741
    # HELP process_cpu_usage The "recent cpu usage" for the Java Virtual Machine process
    # TYPE process_cpu_usage gauge
    process_cpu_usage 1.1286338346640017E-4
    # 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 19.0
    # HELP system_load_average_1m The sum of the number of runnable entities queued to available processors and the number of runnable entities running on the available processors averaged over a period of time
    # TYPE system_load_average_1m gauge
    system_load_average_1m 2.62255859375
    # HELP system_cpu_count The number of processors available to the Java virtual machine
    # TYPE system_cpu_count gauge
    system_cpu_count 12.0

**还可以考虑使用过滤器将 actutator 的查询结果从 json 转化成 key-value，这部分还没调研过。**

[image-20210719164653274]: https://raw.githubusercontent.com/diego1109/pictures/main/20210719164653.png