ExternalControlPlaneAddressIsNotAHostname

当为外部控制平面上的入口网关提供的地址是 IP 地址而不是主机名时，将出现此消息。

示例

您将收到此消息

Info [IST0164] (MutatingWebhookConfiguration istio-sidecar-injector-external-istiod testing.yml:28) The address (https://999.999.999.999:5100/inject/cluster/your-cluster-name/net/network1) that was provided for the webhook (rev.namespace.sidecar-injector.istio.io) to reach the ingress gateway on the external control plane cluster is an IP address. This is not recommended for a production environment.

当您的集群具有以下 ValidatingWebhookConfiguration 和 MutatingWebhookConfiguration（为清晰起见已缩短）时

apiVersion: admissionregistration.k8s.io/v1
kind: ValidatingWebhookConfiguration
metadata:
  name: istio-validator-external-istiod
webhooks:
- admissionReviewVersions:
  - v1beta1
  - v1
  clientConfig:
    url: https://test.com:15017/validate
  name: rev.validation.istio.io

---
apiVersion: admissionregistration.k8s.io/v1
kind: ValidatingWebhookConfiguration
metadata:
  name: istiod-default-validator
webhooks:
- admissionReviewVersions:
  - v1beta1
  - v1
  clientConfig:
    url: https://test.com:15017/validate
  failurePolicy: Ignore
  name: validation.istio.io

---
apiVersion: admissionregistration.k8s.io/v1
kind: MutatingWebhookConfiguration
metadata:
  name: istio-sidecar-injector-external-istiod
webhooks:
- admissionReviewVersions:
  - v1beta1
  - v1
  clientConfig:
    url: https://999.999.999.999:5100/inject/cluster/your-cluster-name/net/network1
  failurePolicy: Fail
  name: rev.namespace.sidecar-injector.istio.io
- admissionReviewVersions:
  - v1beta1
  - v1
  clientConfig:
    url: https://test.com/inject/cluster/your-cluster-name/net/network1
  failurePolicy: Fail
  name: rev.object.sidecar-injector.istio.io
- admissionReviewVersions:
  - v1beta1
  - v1
  clientConfig:
    url: https://test.com/inject/cluster/your-cluster-name/net/network1
  failurePolicy: Fail
  name: namespace.sidecar-injector.istio.io
- admissionReviewVersions:
  - v1beta1
  - v1
  clientConfig:
    url: https://test.com/inject/cluster/your-cluster-name/net/network1
  failurePolicy: Fail
  name: object.sidecar-injector.istio.io

如何解决

在生产环境中，不建议使用 IP 地址而不是主机名来访问在外部控制平面中运行的入口网关。

如果您在生产环境中运行，可以通过将地址更改为解析到入口网关 IP 地址的有效主机名来修复此信息消息。

有关使用公共主机名和 TLS 公开入口网关服务的说明，请参阅此处。