在springBoot中集成actuator可以很方便的管理和监控应用的状态。
暴露的Restful接口有：
| HTTP方法 | 路径 | 描述 | 鉴权 |
|---|---|---|---|
| GET | /autoconfig | 查看自动配置的使用情况 | true |
| GET | /configprops | 查看配置属性，包括默认配置 | true |
| GET | /beans | 查看bean及其关系列表 | true |
| GET | /dump | 打印线程栈 | true |
| GET | /env | 查看所有环境变量 | true |
| GET | /env/{name} | 查看具体变量值 | true |
| GET | /health | 查看应用健康指标 | false |
| GET | /info | 查看应用信息 | false |
| GET | /mappings | 查看所有url映射 | true |
| GET | /metrics | 查看应用基本指标 | true |
| GET | /metrics/{name} | 查看具体指标 | true |
| POST | /shutdown | 关闭应用 | true |
| GET | /trace | 查看基本追踪信息 | true |
其中有不少请求需要鉴权才能访问，由于我们的应用基本都是在通过Nginx暴露给外网的，我们可以在配置文件禁用鉴权拦截。
# 禁用actuator管理端鉴权 management.security.enabled=false # 启用shutdown host:port/shutdown endpoints.shutdown.enabled=true # 禁用密码验证 endpoints.shutdown.sensitive=false
通过访问http://IP:port/metrics可以得到类似如下信息：
1 { 2 "mem": 372386, 3 "mem.free": 129077, 4 "processors": 4, 5 "instance.uptime": 12149, 6 "uptime": 20629, 7 "systemload.average": -1.0, 8 "heap.committed": 302080, 9 "heap.init": 129024, 10 "heap.used": 173002, 11 "heap": 1807872, 12 "nonheap.committed": 72448, 13 "nonheap.init": 2496, 14 "nonheap.used": 70307, 15 "nonheap": 0, 16 "threads.peak": 57, 17 "threads.daemon": 53, 18 "threads.totalStarted": 64, 19 "threads": 55, 20 "classes": 9724, 21 "classes.loaded": 9724, 22 "classes.unloaded": 0, 23 "gc.ps_scavenge.count": 11, 24 "gc.ps_scavenge.time": 151, 25 "gc.ps_marksweep.count": 2, 26 "gc.ps_marksweep.time": 242, 27 "counter.servo.eurekaserver.replication.batchsize.count": 0, 28 "counter.servo.eurekaserver.replication.batchsize.totaltime": 0, 29 "gauge.servo.eurekaserver.replication.batchsize.stddev": 0.0, 30 "gauge.servo.eurekaserver.replication.batchsize.percentile_50": 0.0, 31 "gauge.servo.eurekaserver.replication.batchsize.percentile_95": 0.0, 32 "gauge.servo.eurekaserver.replication.batchsize.percentile_99": 0.0, 33 "gauge.servo.eurekaserver.replication.batchsize.percentile_99_50": 0.0, 34 "counter.servo.eurekaserver.replication.acceptedtasks": 0, 35 "counter.servo.eurekaserver.replication.replayedtasks": 0, 36 "counter.servo.eurekaserver.replication.expiredtasks": 0, 37 "counter.servo.eurekaserver.replication.overriddentasks": 0, 38 "counter.servo.eurekaserver.replication.queueoverflows": 0, 39 "gauge.servo.eurekaserver.replication.acceptorqueuesize": 0, 40 "gauge.servo.eurekaserver.replication.pendingjobrequests": 1, 41 "gauge.servo.eurekaserver.replication.availablejobs": 0, 42 "gauge.servo.eurekaserver.replication.reprocessqueuesize": 0, 43 "gauge.servo.eurekaserver.replication.queuesize": 0, 44 "counter.servo.count": 0, 45 "counter.servo.count-minus-replication": 0, 46 "counter.servo.eurekaserver.replication.executiontime.count": 0, 47 "counter.servo.eurekaserver.replication.executiontime.totaltime": 0, 48 "gauge.servo.eurekaserver.replication.executiontime.stddev": 0.0, 49 "gauge.servo.eurekaserver.replication.executiontime.percentile_50": 0.0, 50 "gauge.servo.eurekaserver.replication.executiontime.percentile_95": 0.0, 51 "gauge.servo.eurekaserver.replication.executiontime.percentile_99": 0.0, 52 "gauge.servo.eurekaserver.replication.executiontime.percentile_99_50": 0.0, 53 "counter.servo.eurekaserver.replication.numberofsuccessfulexecutions": 0, 54 "counter.servo.eurekaserver.replication.numberoftransienterrors": 0, 55 "counter.servo.eurekaserver.replication.numberofpermanenterrors": 0, 56 "normalized.servo.serialize-all.totaltime": 0.0, 57 "normalized.servo.serialize-all.count": 0.0, 58 "gauge.servo.serialize-all.min": 0.0, 59 "gauge.servo.serialize-all.max": 0.0, 60 "normalized.servo.serialize-all-delta.totaltime": 0.0, 61 "normalized.servo.serialize-all-delta.count": 0.0, 62 "gauge.servo.serialize-all-delta.min": 0.0, 63 "gauge.servo.serialize-all-delta.max": 0.0, 64 "normalized.servo.serialize-all_remote_region.totaltime": 0.0, 65 "normalized.servo.serialize-all_remote_region.count": 0.0, 66 "gauge.servo.serialize-all_remote_region.min": 0.0, 67 "gauge.servo.serialize-all_remote_region.max": 0.0, 68 "normalized.servo.serialize-all-delta_remote_region.totaltime": 0.0, 69 "normalized.servo.serialize-all-delta_remote_region.count": 0.0, 70 "gauge.servo.serialize-all-delta_remote_region.min": 0.0, 71 "gauge.servo.serialize-all-delta_remote_region.max": 0.0, 72 "normalized.servo.serialize-one.totaltime": 0.0, 73 "normalized.servo.serialize-one.count": 0.0, 74 "gauge.servo.serialize-one.min": 0.0, 75 "gauge.servo.serialize-one.max": 0.0, 76 "normalized.servo.serialize-one-vip.totaltime": 0.0, 77 "normalized.servo.serialize-one-vip.count": 0.0, 78 "gauge.servo.serialize-one-vip.min": 0.0, 79 "gauge.servo.serialize-one-vip.max": 0.0, 80 "normalized.servo.compress-payload.totaltime": 0.0, 81 "normalized.servo.compress-payload.count": 0.0, 82 "gauge.servo.compress-payload.min": 0.0, 83 "gauge.servo.compress-payload.max": 0.0, 84 "gauge.servo.responsecachesize": 0, 85 "counter.servo.discovery-peernodeclient-localhost_reuse": 0, 86 "counter.servo.discovery-peernodeclient-localhost_createnew": 0, 87 "counter.servo.discovery-peernodeclient-localhost_request": 0, 88 "counter.servo.discovery-peernodeclient-localhost_release": 0, 89 "counter.servo.discovery-peernodeclient-localhost_delete": 0, 90 "normalized.servo.discovery-peernodeclient-localhost_requestconnectiontimer.totaltime": 0.0, 91 "normalized.servo.discovery-peernodeclient-localhost_requestconnectiontimer.count": 0.0, 92 "gauge.servo.discovery-peernodeclient-localhost_requestconnectiontimer.min": 0.0, 93 "gauge.servo.discovery-peernodeclient-localhost_requestconnectiontimer.max": 0.0, 94 "normalized.servo.discovery-peernodeclient-localhost_createconnectiontimer.totaltime": 0.0, 95 "normalized.servo.discovery-peernodeclient-localhost_createconnectiontimer.count": 0.0, 96 "gauge.servo.discovery-peernodeclient-localhost_createconnectiontimer.min": 0.0, 97 "gauge.servo.discovery-peernodeclient-localhost_createconnectiontimer.max": 0.0, 98 "gauge.servo.connectioncount": 0, 99 "gauge.servo.localregistrysize": 0, 100 "gauge.servo.numofreplicationsinlastmin": 0, 101 "gauge.servo.isbelowrenewthreshold": 0, 102 "gauge.servo.numofrenewsinlastmin": 0, 103 "gauge.servo.numofrenewsperminthreshold": 1, 104 "gauge.servo.numofelementsininstancecache": 0, 105 "normalized.servo.eureka-connection-cleaner-time.totaltime": 0.0, 106 "normalized.servo.eureka-connection-cleaner-time.count": 0.0, 107 "gauge.servo.eureka-connection-cleaner-time.min": 0.0, 108 "gauge.servo.eureka-connection-cleaner-time.max": 0.0, 109 "counter.servo.eureka-connection-cleaner-failure": 0, 110 "httpsessions.max": -1, 111 "httpsessions.active": 0 112 }
如果只关心某部分参数可以使用：http://IP:port/metrics/mem来查看特定参数的值
{"mem":373311}
