Spring-boot 添加自定义健康检测 /actuator/health

一、如何添加自己的一个健康检测项到检测体系里

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.actuate.health.Health;
import org.springframework.boot.actuate.health.HealthIndicator;
import org.springframework.stereotype.Component;

/**
 *  添加一个自定义的健康监测
 * Author: zhangjianshou 

 * Description:
 * @Date: 2022/12/28 17:25
 */
@Component
public class LocalDiyHealth implements HealthIndicator {

    private static final Logger log = LoggerFactory.getLogger(LocalDiyHealth.class);

    /**
     * Description: 自定义健康监测接口，http://127.0.0.1/actuator/health，请求时候，会触发本方法
     * @author zhangjianshou
     * @param includeDetails
     * @return:
     * @Exception:  

     * @Date: 2022/12/28 17:38
     */
    @Override
    public Health getHealth(boolean includeDetails) {
        log.debug("正在检查health...");
        Health.Builder up = Health.up().withDetail("我是健康的", "up up");
        try {
            /*if (up != null) {
                throw new Exception("test  down");
            }*/
            return up.build();
        } catch (Exception e) {
            log.error("检查异常", e);
            return Health.down().withException(e).withDetail("我是不健康的", "down down").build();
        }
    }

    @Override
    public Health health() {
        log.debug("正在检查health...");
        Health.Builder up = Health.up().withDetail("localDiyHealth", "up");
        try {
            return up.build();
        } catch (Exception e) {
            log.error("检查异常");
            return up.withException(e).build();
        }
    }
}

二、如果开发了一个组件，想让用户引入组件后，让spring自动检测该组件，下面以nacos为例

1. 组件代码里添加定义选项

import com.alibaba.nacos.api.config.ConfigService;
import org.springframework.boot.actuate.health.AbstractHealthIndicator;
import org.springframework.boot.actuate.health.Health;

public class DiyNacosConfigHealthIndicator extends AbstractHealthIndicator {

    private final ConfigService configService;

    public DiyNacosConfigHealthIndicator(ConfigService configService) {
        this.configService = configService;
    }

    @Override
    protected void doHealthCheck(Health.Builder builder) throws Exception {
        // Just return "UP" or "DOWN"
        String status = configService.getServerStatus();
        // Set the status to Builder
        builder.status(status);
        switch (status) {
        case "UP":
            builder.up();
            break;
        case "DOWN":
            builder.down();
            break;
        default:
            builder.unknown();
            break;
        }
    }

}

2. 注册健康检测选项

 
import com.alibaba.cloud.nacos.NacosConfigManager;
import com.alibaba.cloud.nacos.refresh.NacosRefreshHistory;
import com.dhgate.zjs.health.indicator.DiyNacosConfigHealthIndicator;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.actuate.autoconfigure.endpoint.condition.ConditionalOnAvailableEndpoint;
import org.springframework.boot.actuate.autoconfigure.health.ConditionalOnEnabledHealthIndicator;
import org.springframework.boot.actuate.endpoint.annotation.Endpoint;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
import org.springframework.context.annotation.Bean;

/**
 * @author xiaojing
 */
@ConditionalOnWebApplication
@ConditionalOnClass(Endpoint.class)
@ConditionalOnProperty(name = "spring.cloud.nacos.config.enabled", matchIfMissing = true)
public class NacosConfigEndpointAutoConfiguration {

    @Autowired
    private NacosConfigManager nacosConfigManager;

    @Bean
    @ConditionalOnMissingBean
    @ConditionalOnEnabledHealthIndicator("nacos-config")
    public DiyNacosConfigHealthIndicator nacosConfigHealthIndicator() {
        return new DiyNacosConfigHealthIndicator(nacosConfigManager.getConfigService());
    }

}

3. 启动工程请求地址：http://127.0.0.1:8081/actuator/health

就会出现如下

{"status":"UP","components":{"diskSpace":{"status":"UP","details":{"total":"500106792960","free":"215939887104","threshold":"10485760","exists":true}},"nacos":{"status":"UP"}}}