SpringBoot 2.x （15）：Actuator監控

Actuator監控：SpringBoot自帶的，對生成環境進行監控的系統

使用：既然是監控，那就不能監控一個空項目

這里我使用SpringBoot整合MyBatis的Demo:

https://www.cnblogs.com/xuyiqing/p/10837299.html

依賴

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

然后直接啟動項目即可

 

訪問http://localhost:8080/actuator

{
    "_links": {
        "self": {
            "href": "http://localhost:8080/actuator",
            "templated": false
        },
        "health-component-instance": {
            "href": "http://localhost:8080/actuator/health/{component}/{instance}",
            "templated": true
        },
        "health-component": {
            "href": "http://localhost:8080/actuator/health/{component}",
            "templated": true
        },
        "health": {
            "href": "http://localhost:8080/actuator/health",
            "templated": false
        },
        "info": {
            "href": "http://localhost:8080/actuator/info",
            "templated": false
        }
    }
}

顯示可監控列表

 

訪問http://localhost:8080/actuator/health

{"status":"UP"}

說明狀態正常

 

進一步地，使用Actuator獲取地JSON可以寫前端頁面進行顯示，或者結合定時任務

比如定時訪問http://localhost:8080/actuator/health，如果返回UP說明正常，然后進行其他操作

 

問題解決：訪問http://localhost:8080/actuator/health顯示404

原因：SpringBoot版本問題，SpringBoot1.x訪問http://localhost:8080/health

 

其實這里獲得的是較少的信息，更多的信息需要進行配置：

management.endpoints.web.exposure.include=*

 

現在訪問：http://localhost:8080/actuator

{
    "_links": {
        "self": {
            "href": "http://localhost:8080/actuator",
            "templated": false
        },
        "auditevents": {
            "href": "http://localhost:8080/actuator/auditevents",
            "templated": false
        },
        "beans": {
            "href": "http://localhost:8080/actuator/beans",
            "templated": false
        },
        "caches-cache": {
            "href": "http://localhost:8080/actuator/caches/{cache}",
            "templated": true
        },
        "caches": {
            "href": "http://localhost:8080/actuator/caches",
            "templated": false
        },
        "health": {
            "href": "http://localhost:8080/actuator/health",
            "templated": false
        },
        "health-component-instance": {
            "href": "http://localhost:8080/actuator/health/{component}/{instance}",
            "templated": true
        },
        "health-component": {
            "href": "http://localhost:8080/actuator/health/{component}",
            "templated": true
        },
        "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
        },
        "info": {
            "href": "http://localhost:8080/actuator/info",
            "templated": false
        },
        "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
        },
        "httptrace": {
            "href": "http://localhost:8080/actuator/httptrace",
            "templated": false
        },
        "mappings": {
            "href": "http://localhost:8080/actuator/mappings",
            "templated": false
        }
    }
}

 

訪問：http://localhost:8080/actuator/env

獲得配置信息

 

訪問：http://localhost:8080/actuator/beans

監控項目Spring中的beans

 

訪問：http://localhost:8080/actuator/metrics

查看應用基本指標列表

 

通常不建議全部開啟，因為不安全

所以，可以這樣配置

#開啟全部
management.endpoints.web.exposure.include=*
#開啟某個
management.endpoints.web.exposure.include=metrics
#關閉某個
management.endpoints.web.exposure.exclude=metrics

 

SpringBoot的學習暫時結束了：

總結和未來規划：

學會了基本的配置、整合Mybatis、Redis、ActiveMQ、ElasticSearch等

技術棧的規划：

初級路線：Java基礎->Java Web（html+css+js,servlet,request+response,ajax,mysql+jdbc...）->SSM、SSH->SpringBoot->Spring Cloud

高級路線：Linux->源碼閱讀（Spring、JDK）->數據庫優化（分庫分表，慢查詢，調優...）->緩存（Redis集群...）->HTTP/HTTPS協議優化

                 ->安全（XSS、DDOS、CSRF）->消息隊列（ActiveMQ,Kafka,RocketMQ）->搜索框架（Lucene、Solr、ElasticSearch）->Docker、K8S

 

下面開始Spring Cloud的學習！