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knative - 如何在 Knative 中从一个服务向另一个服务发出集群本地请求？

问题描述

我已按照本指南https://knative.dev/docs/serving/cluster-local-route/使服务集群本地化。

我正在尝试使用 curl 命令从群集内的另一个服务访问该服务，但我总是遇到无法解决主机错误。

我尝试使用 curl helloworld-default.svc.cluster和curl -H "Host: helloworld-go.default.svc.cluster " http://< cluster_ip > 命令发出请求。

我错过了什么？我是否需要对 Istio virtualService 进行任何配置才能使其正常工作？（我在 GKE 中运行 Knative）

标签： knative

解决方案

I think you are missing the .local and it should work.

curl -H "Host: helloworld-go.default.svc.cluster.local" http://< cluster_ip >

But you should be able to drop the ClusterIP entirely as you are making the request from within the cluster. Basically execute:

curl helloworld-go.default.svc.cluster.local

The DNS helloworld-go.default.svc.cluster.local will be resolved by the Kubernetes DNS resolution mechanism.

It's important to specify the HOST header only on ingress traffic (public traffic entering into private traffic).

Details: The Knative Service creates a Route CRD, which creates a ClusterIngress which will be picked up by a controller (by default istio-network) to configure the Ingress Gateway (using another CRD in istio's case VirtualService). Ingress Gateways routing is based on the HOST header.

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