应用程序状态关闭，当 mongo 使用 spring boot 执行器关闭时

Question

我已经为带有数据库测试的弹簧启动执行器创建了示例项目。当我点击 URL 时运行应用程序后

• Mongo DB 运行时
• 网址：http://localhost:8080/health
• 响应： `{"status":"UP","diskSpace":{"status":"UP","total":493767094272,"free":404928278528,"threshold":10485760},"mongo":{"status" :"UP","version":"3.0.2"}}

`

• Mongo DB 未运行时
• 网址： http://localhost:8080/health

• 回复：

  {"status":"DOWN","diskSpace":{"status":"UP","total":493767094272,"free":404929720320,"threshold":10485760},"mongo":{" status":"DOWN","error":"org.springframework.dao.DataAccessResourceFailureException: 在等待与 ReadPreferenceServerSelector{readPreference=primary} 匹配的服务器时超时 30000 ms。集群状态的客户端视图是 {type=UNKNOWN,服务器=[{address=localhost:27017, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketOpenException: 异常打开套接字}, 由 {java.net.ConnectException: Connection refused: connect}}]; 嵌套异常是 com.mongodb.MongoTimeoutException: 在等待与 ReadPreferenceServerSelector{readPreference=primary} 匹配的服务器时超时 30000 ms。集群状态的客户端视图是 {type=UNKNOWN, servers=[{address=localhost:27017, type= UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketOpenException: Exception opening socket}, 由 {java.net.ConnectException: Connection refu 引起sed: 连接}}]"}}

问题：为什么我的 mongodb 没有运行时应用程序状态为“DOWN”。我希望我的应用程序状态“UP”天气 mongodb 是“DOWN”或“UP”。

下面是我的 Spring Boot 应用程序主类。

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

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;
    }
}

Answer 2

Spring Boot Actuator 使用HealthIndicatorAutoconfiguration 来配置各种健康相关的bean。其中一个bean 称为healthAggregator，它使用实现或OrderedHealthAggregator。它将使用所有健康指标中最低的状态来提供整体应用程序状态（这就是为什么您会为整个应用程序获得 DOWN。

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 关闭并在您的配置中提供它：

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