portal和adminservice通信导致HA问题

[whl12345]

portal与adminservice间的服务注册发现基于eureka，
如果adminservice部分节点重启，由于eureka是ap架构，导致portal获取adminservice列表通知不及时，通过压测portal写接口发现存在超时错误，如何改善？

[whl12345]

排查apollo代码发现portal调用adminservice非get请求没有重试，如果eureka通知不及时，k8s环境下客户端请求失效服务端，易引发客户端超时

[dosubot]

Answer generated by a 🤖

Answer

为了改善Apollo配置管理系统中portal和adminservice之间的通信并防止高负载期间的超时错误，您可以考虑以下方法：

1. 增加Eureka客户端的注册获取间隔：默认情况下，Eureka客户端每30秒获取一次注册。如果您的服务不经常更改，您可以增加此间隔以减少Eureka服务器和网络的负载。这可以通过在application.yml中添加以下配置来完成：

eureka:
  client:
    registryFetchIntervalSeconds: 60

2. 启用Eureka客户端的缓存：启用缓存可以减少对Eureka服务器的请求次数。这可以通过在application.yml中添加以下配置来完成：

eureka:
  client:
    fetchRegistry: true
    cacheRefreshExecutorExpiryInSeconds: 300
    cacheRefreshExecutorIntervalInSeconds: 30

3. 增加服务器超时：如果超时错误是由于服务器响应时间过长引起的，您可以增加服务器超时。这可以通过在application.yml中添加以下配置来完成：

server:
  tomcat:
    connectionTimeout: 20000

4. 调整AdminServiceAddressLocator中的刷新间隔：在共享的上下文中，Apollo中的AdminServiceAddressLocator类有一个NORMAL_REFRESH_INTERVAL为5分钟，OFFLINE_REFRESH_INTERVAL为10秒。如果在重启某些adminservice节点时服务列表更新延迟，您可能需要减少NORMAL_REFRESH_INTERVAL或增加OFFLINE_REFRESH_INTERVAL。但是，请注意，这可能会增加系统的负载。

5. 调整Eureka服务URL轮询间隔：在共享的上下文中，eurekaServiceUrlPollIntervalSeconds设置为60秒。这意味着Eureka客户端将每60秒向Eureka服务器轮询一次服务URL更新。如果在重启某些adminservice节点时服务列表更新延迟，您可能需要减少此间隔。但是，请注意，这可能会增加系统的负载。这可以通过在application.yml中修改以下配置来完成：

eureka:
  client:
    eurekaServiceUrlPollIntervalSeconds: 30

请注意，这些都是一般性建议，实际值可能需要根据您的特定用例和环境进行调整。

来源：

• apollo-adminservice/src/test/resources/application.yml
• apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/component/AdminServiceAddressLocator.java
• apollo-adminservice/src/main/resources/application.yml

Sources

• apollo-adminservice/src/test/resources/application.yml
• apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/component/AdminServiceAddressLocator.java
• apollo-adminservice/src/main/resources/application.yml
• apollo-configservice/src/main/java/com/ctrip/framework/apollo/configservice/ConfigServerEurekaServerConfigure.java
• apollo-adminservice/src/main/resources/application-custom-defined-discovery.properties
• apollo-configservice/src/main/resources/application.yml
• apollo-portal/src/main/resources/apollo-env.properties

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This issue has been automatically marked as stale because it has not had activity in the last 30 days. It will be closed in 7 days unless it is tagged "help wanted" or other activity occurs. Thank you for your contributions.

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