为什么尤里卡认为一项服务仍然'UP'即使它的最后一次续订时间是两天前

Question

我有一个运行2个副本的服务。但是我发现该服务在尤里卡（Eureka）的仪表板中具有3 up 实例。

在尤里卡（Eureka）的服务详细信息下面。有问题的实例是 8D0C39F3ED9B：OCR-Server：8095 ，其最后一次续订时间是两天前。状态和健康URL无法访问。我想知道为什么Eureka认为它已经开始了！

<application>
<name>OCR-SERVER</name>
<instance>
<instanceId>211a4634b45f:ocr-server:8095</instanceId>
<hostName>211a4634b45f</hostName>
<app>OCR-SERVER</app>
<ipAddr>10.0.0.38</ipAddr>
<status>UP</status>
<overriddenstatus>UNKNOWN</overriddenstatus>
<port enabled="true">8095</port>
<securePort enabled="false">443</securePort>
<countryId>1</countryId>
<dataCenterInfo class="com.netflix.appinfo.InstanceInfo$DefaultDataCenterInfo">
<name>MyOwn</name>
</dataCenterInfo>
<leaseInfo>
<renewalIntervalInSecs>30</renewalIntervalInSecs>
<durationInSecs>90</durationInSecs>
<registrationTimestamp>1505589414444</registrationTimestamp>
<lastRenewalTimestamp>1505833520772</lastRenewalTimestamp>
<evictionTimestamp>0</evictionTimestamp>
<serviceUpTimestamp>1505589414444</serviceUpTimestamp>
</leaseInfo>
<metadata class="java.util.Collections$EmptyMap"/>
<homePageUrl>http://211a4634b45f:8095/</homePageUrl>
<statusPageUrl>http://211a4634b45f:8096/manage/info</statusPageUrl>
<healthCheckUrl>http://211a4634b45f:8096/manage/health</healthCheckUrl>
<vipAddress>ocr-server</vipAddress>
<secureVipAddress>ocr-server</secureVipAddress>
<isCoordinatingDiscoveryServer>false</isCoordinatingDiscoveryServer>
<lastUpdatedTimestamp>1505589414444</lastUpdatedTimestamp>
<lastDirtyTimestamp>1505589412731</lastDirtyTimestamp>
<actionType>ADDED</actionType>
</instance>
<instance>
<instanceId>8d0c39f3ed9b:ocr-server:8095</instanceId>
<hostName>8d0c39f3ed9b</hostName>
<app>OCR-SERVER</app>
<ipAddr>10.0.0.38</ipAddr>
<status>UP</status>
<overriddenstatus>UNKNOWN</overriddenstatus>
<port enabled="true">8095</port>
<securePort enabled="false">443</securePort>
<countryId>1</countryId>
<dataCenterInfo class="com.netflix.appinfo.InstanceInfo$DefaultDataCenterInfo">
<name>MyOwn</name>
</dataCenterInfo>
<leaseInfo>
<renewalIntervalInSecs>30</renewalIntervalInSecs>
<durationInSecs>90</durationInSecs>
<registrationTimestamp>1505589356797</registrationTimestamp>
<lastRenewalTimestamp>1505589356797</lastRenewalTimestamp>
<evictionTimestamp>0</evictionTimestamp>
<serviceUpTimestamp>1505589356797</serviceUpTimestamp>
</leaseInfo>
<metadata class="java.util.Collections$EmptyMap"/>
<homePageUrl>http://8d0c39f3ed9b:8095/</homePageUrl>
<statusPageUrl>http://8d0c39f3ed9b:8096/manage/info</statusPageUrl>
<healthCheckUrl>http://8d0c39f3ed9b:8096/manage/health</healthCheckUrl>
<vipAddress>ocr-server</vipAddress>
<secureVipAddress>ocr-server</secureVipAddress>
<isCoordinatingDiscoveryServer>false</isCoordinatingDiscoveryServer>
<lastUpdatedTimestamp>1505589356797</lastUpdatedTimestamp>
<lastDirtyTimestamp>1505589356787</lastDirtyTimestamp>
<actionType>ADDED</actionType>
</instance>
<instance>
<instanceId>0c62739f5ca8:ocr-server:8095</instanceId>
<hostName>0c62739f5ca8</hostName>
<app>OCR-SERVER</app>
<ipAddr>10.0.0.34</ipAddr>
<status>UP</status>
<overriddenstatus>UNKNOWN</overriddenstatus>
<port enabled="true">8095</port>
<securePort enabled="false">443</securePort>
<countryId>1</countryId>
<dataCenterInfo class="com.netflix.appinfo.InstanceInfo$DefaultDataCenterInfo">
<name>MyOwn</name>
</dataCenterInfo>
<leaseInfo>
<renewalIntervalInSecs>30</renewalIntervalInSecs>
<durationInSecs>90</durationInSecs>
<registrationTimestamp>1505589403150</registrationTimestamp>
<lastRenewalTimestamp>1505833509700</lastRenewalTimestamp>
<evictionTimestamp>0</evictionTimestamp>
<serviceUpTimestamp>1505589403150</serviceUpTimestamp>
</leaseInfo>
<metadata class="java.util.Collections$EmptyMap"/>
<homePageUrl>http://0c62739f5ca8:8095/</homePageUrl>
<statusPageUrl>http://0c62739f5ca8:8096/manage/info</statusPageUrl>
<healthCheckUrl>http://0c62739f5ca8:8096/manage/health</healthCheckUrl>
<vipAddress>ocr-server</vipAddress>
<secureVipAddress>ocr-server</secureVipAddress>
<isCoordinatingDiscoveryServer>false</isCoordinatingDiscoveryServer>
<lastUpdatedTimestamp>1505589403150</lastUpdatedTimestamp>
<lastDirtyTimestamp>1505589400020</lastDirtyTimestamp>
<actionType>ADDED</actionType>
</instance>
</application>

eureka客户端的配置如下所示，

eureka:
  instance:
    statusPageUrlPath: /info
    healthCheckUrlPath: /health
    preferIpAddress: false
  client:
    fetchRegistry: true
    registryFetchIntervalSeconds: 5
    healthcheck:
      enabled: true
    serviceUrl:
      defaultZone: http://eureka-peer1:8761/eureka,http://eureka-peer2:8761/eureka

eureka服务器的配置是

eureka:
  instance:
    preferIpAddress: true
    enableSelfPreservation: false
    homePageUrl: http://${eureka.hostname}/
---
spring:
  profiles: peer1
eureka:
  instance:
    hostname: eureka-peer1
  client:
    serviceUrl:
      defaultZone: http://eureka-peer2:${server.port}/eureka/
---
spring:
  profiles: peer2
eureka:
  instance:
    hostname: eureka-peer2
  client:
    serviceUrl:
      defaultZone: http://eureka-peer1:${server.port}/eureka/

eureka客户端和服务器都在Docker Swarm中运行。

Answer 1

您的服务器可能已输入自保存模式，这就是为什么您在那里看到一个陈旧的实例。

我看到您有enableSelfPreservation: false选项，但是它不在正确的部分中，它应该是eureka.server.enableSelfPreservation，您的条目在eureka.instance.enableSelfPreservation下，这是不对的。