In a production environment, it is necessary to monitor the availability of services in real time or regularly. Spring Boot's actuator (health monitoring) function provides many interfaces required for monitoring, which can configure and view the application system, and perform related function statistics.
Actuator provides a Rest interface to display monitoring information.
The interface is divided into three major categories:
Application configuration class: Obtain configuration class information related to SpringBoot applications such as application configuration, environment variables, automated configuration reports loaded in the application.
Metric class: Obtain the metrics used for monitoring during the running of the application, such as: memory information, thread pool information, HTTP request statistics, etc.
Operation control class: Provides operation functions such as closing the application.
<!-- 监控依赖 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency>
# 端口 server: port: 8016 spring: application: # 应用名称 name: node16-boot-actuator management: endpoints: web: exposure: # 打开所有的监控点 include: "*" # 自定义监控路径 monitor # 默认值:http://localhost:8016/actuator/* # 配置后:http://localhost:8016/monitor/* base-path: /monitor endpoint: health: show-details: always shutdown: # 通过指定接口关闭 SpringBoot enabled: true # 可以自定义端口 # server: # port: 8089 # 描述项目基础信息 info: app: name: node16-boot-actuator port: 8016 version: 1.0.0 author: cicada
Basic project information configured in the Yml file
路径:http://localhost:8016/monitor/info 输出: { "app": { "name": "node16-boot-actuator", "port": 8016, "version": "1.0.0", "author": "cicada" } }
health is mainly used to check the running status of the application
路径:http://localhost:8016/monitor/health 输出: { "status": "UP", "details": { "diskSpace": { "status": "UP", "details": { "total": 185496236032, "free": 140944084992, "threshold": 10485760 } } } }
shows the bean type, single instance and multiple instances, alias, full path of the class, dependent Jar, etc.
路径:http://localhost:8016/monitor/beans 输出: { "contexts": { "node16-boot-actuator": { "beans": { "endpointCachingOperationInvokerAdvisor": { "aliases": [], "scope": "singleton", "type": "org.springframework.boot.actuate.endpoint.invoker.cache.CachingOperationInvokerAdvisor", "resource": "class path resource [org/springframework/boot/actuate/autoconfigure/endpoint/EndpointAutoConfiguration.class]", "dependencies": ["environment"] } } } }
Check the conditions under which the configuration is valid, or why the automatic configuration is invalid.
路径:http://localhost:8016/monitor/conditions 输出: { "contexts": { "node16-boot-actuator": { "positiveMatches": { "AuditAutoConfiguration#auditListener": [{ "condition": "OnBeanCondition", "message": "@ConditionalOnMissingBean" }], } }
Automatically generates the Jvm heap dump file HeapDump. You can use the monitoring tool VisualVM to open this file to view the memory snapshot.
路径:http://localhost:8016/monitor/heapdump
Describes the mapping relationship between URI paths and controllers
路径:http://localhost:8016/monitor/mappings 输出: { "contexts": { "node16-boot-actuator": { "mappings": { "dispatcherServlets": { "dispatcherServlet": [ { "handler": "Actuator web endpoint 'auditevents'", "predicate": "{GET /monitor/auditevents || application/json]}", "details": { "handlerMethod": { "className": "org.springframework.boot.actuate.endpoint.web.servlet.AbstractWebMvcEndpointHandlerMapping.Operat "name": "handle", "descriptor": "(Ljavax/servlet/http/HttpServletRequest;Ljava/util/Map;)Ljava/lang/Object;" }, "requestMappingConditions": { "consumes": [], "headers": [], "methods": ["GET"], "params": [], "patterns": ["/monitor/auditevents"], "produces": [{ "mediaType": "application/vnd.spring-boot.actuator.v2+json", "negated": false }, { "mediaType": "application/json", "negated": false }] } } } } } }
Displays thread name, thread ID, Whether to wait for locks, thread status, thread locks and other related information.
路径:http://localhost:8016/monitor/threaddump 输出: { "threads": [{ "threadName": "DestroyJavaVM", "threadId": 34, "blockedTime": -1, "blockedCount": 0, "waitedTime": -1, "waitedCount": 0, "lockName": null, "lockOwnerId": -1, "lockOwnerName": null, "inNative": false, "suspended": false, "threadState": "RUNNABLE", "stackTrace": [], "lockedMonitors": [], "lockedSynchronizers": [], "lockInfo": null } ] }
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