kubernetes - Istio是否允许为断路器打开配置最大响应超时？怎么样？

Question

我正在检查documentation for the DestinationRule，其中有几个断路配置的示例，例如:

apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
  name: bookinfo-app
spec:
  host: bookinfoappsvc.prod.svc.cluster.local
  trafficPolicy:
    connectionPool:
      tcp:
        connectTimeout: 30ms
          ...

connectionPool.tcp元素提供一个connectTimeout。但是，我需要配置的是最大响应超时。想象一下，如果服务需要5秒钟以上才能回答，那么我想断开电路。是否可以在Istio中进行配置？怎么样？

Answer 1

看看Tasks --> Traffic Management --> Setting Request Timeouts:

A timeout for http requests can be specified using the timeout field of the route rule. By default, the timeout is 15 seconds [...]

因此，必须在 http.timeout配置中设置 VirtualService。
从 Virtual Service / Destination官方文档中查看以下示例:

The following VirtualService sets a timeout of 5s for all calls to productpage.prod.svc.cluster.local service in Kubernetes.

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: my-productpage-rule
  namespace: istio-system
spec:
  hosts:
  - productpage.prod.svc.cluster.local # ignores rule namespace
  http:
  - timeout: 5s
    route:
    - destination:
        host: productpage.prod.svc.cluster.local

http.timeout: Timeout for HTTP requests.