当 mongo 与 spring 引导执行器一起关闭时，应用程序状态关闭

Question

我已经为 spring 引导执行器创建了带有数据库测试的示例项目。运行申请的时候我打了 URL

当 Mongo DB 为运行
URL: http://localhost:8080/health
回应： `{"status":"UP","diskSpace":{"status":"UP","total":493767094272,[=56=]:404928278528,"threshold":10485760},"mongo":{"status":"UP","version":"3.0.2"}}

`

当 Mongo DB 不是运行
URL: http://localhost:8080/health
响应：

{"status":"DOWN","diskSpace":{"status":"UP","total":493767094272,[=56=] :404929720320,"threshold":10485760},"mongo":{"status":"DOWN","error":"org.springframework.dao.DataAccessResourceFailureException: Timed out after 30000 ms while waiting for a server that matches ReadPreferenceServerSelector{readPreference=primary}. Client view of cluster state is {type=UNKNOWN, servers=[{address=localhost:27017, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketOpenException: Exception opening socket}, caused by {java.net.ConnectException: Connection refused: connect}}]; nested exception is com.mongodb.MongoTimeoutException: Timed out after 30000 ms while waiting for a server that matches ReadPreferenceServerSelector{readPreference=primary}. Client view of cluster state is {type=UNKNOWN, servers=[{address=localhost:27017, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketOpenException: Exception opening socket}, caused by {java.net.ConnectException: Connection refused: connect}}]"}}

问题：为什么申请状态是"DOWN"，而我的mongodb不是运行。我希望我的申请状态 "UP" 天气 mongodb 是 "DOWN" 或 "UP".

下面是 class 用于 spring 引导应用程序的主要 class。

package com.company.testing;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <artifactId>SpringBootSample</artifactId>
    <version>0.0.1</version>
    <name>Spring Boot Sample</name>
    <description>Spring Boot Sample for spring boot actuator</description>
    <groupId>com.company.testing</groupId>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.3.RELEASE</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-mongodb</artifactId>
        </dependency>


    </dependencies>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

Answer 1

Spring Boot Actuator 使用 HealthIndicatorAutoconfiguration to configure various health related beans. One of the beans is called healthAggregator which uses the implementation or OrderedHealthAggregator。它将使用所有运行状况指标中的最低状态来提供整体应用程序状态（这就是为什么您对整个应用程序感到失望。

您可以关闭 MongoDb 监控 (management.health.mongo.enabled=false) 或编写您自己的 AbstractHealthAggregator 实现，例如忽略 MongoDb 正在关闭并在你的配置：

    @Bean
    public MyHealthAggregator healthAggregator() {
        return new MyHealthAggregator();
    }

Answer 2

application.properties

management.health.mongo.enabled=false
endpoints.mongo.enabled=true

MongoDBHealthCheckEndPoint.java

@ConfigurationProperties(prefix = "endpoints.mongo", ignoreUnknownFields =     true)
@Component
public class MongoDBHealthCheckEndPoint extends    AbstractEndpoint<Map<String, String>> 
 {

@Inject
MongoTemplate mongoTemplate;


private static final Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());

private static final Map<String, String> UP = new HashMap<String, String>() {{
    put("mongo.status", "UP");
}};

private static final Map<String, String> DOWN = new HashMap<String, String>() {{
    put("mongo.status", "DOWN");
}};


public MongoDBHealthCheckEndPoint() {
    super("mongo", false);
}

public MongoDBHealthCheckEndPoint(Map<String, ? extends Object> mongo) {
    super("mongo", false);
}

public Map<String, String> invoke() {
    try {
        return (new MongoHealthIndicator(mongoTemplate).health().getStatus().equals(Status.UP)) ? UP : DOWN;
    } catch (Exception e) {
        log.error("mongo database is down", e);
        return DOWN;
    }
}

当 mongo 与 spring 引导执行器一起关闭时，应用程序状态关闭

Application status down, when mongo is down with spring boot actuator

java

mongodb

maven

spring-boot

spring-boot-actuator