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}
