服务网格

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文档中心服务网格常见问题重试策略导致服务异常

重试策略导致服务异常

最近更新时间：2023-08-29 10:10:57

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解决方案

Istio 为 Envoy 设置了缺省的重试策略，会在 connect-failure, refused-stream, unavailable, cancelled, retriable-status-codes 等情况下缺省重试两次。出现错误时，可能已经触发了服务器逻辑，在操作不是幂等（任意多次执行所产生的影响均与一次执行的影响相同）的情况下，可能会导致错误。
解决方案
可以通过配置 VS 关闭重试：  
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: ratings
spec:
  hosts:
  - ratings
  http:
  - retries:
      attempts: 0
﻿

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