Kubernetes Ingress return fabric8 证书与 curl 证书不同

Question

使用 fabric8 kubernetes client，我在同一端点上收到了与 curl 不同的证书。

具体来说，我收到的是入口自签名证书（CN=Kubernetes Ingress Controller Fake Certificate），而不是指定的。

入口配置（kubectl edit ingress 的结果）

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  creationTimestamp: "2020-08-07T09:33:18Z"
  generation: 1
  labels:
    app: dummy
    app.kubernetes.io/component: dummy-component
    app.kubernetes.io/instance: dummy-instance
    app.kubernetes.io/managed-by: Dummy
    app.kubernetes.io/name: dummy
    app.kubernetes.io/part-of: dummy-sample
    app.kubernetes.io/version: 1.12.0-SNAPSHOT
  managedFields:
  - apiVersion: extensions/v1beta1
    fieldsType: FieldsV1
    fieldsV1:
      f:metadata:
        f:labels:
          .: {}
          f:app: {}
          f:app.kubernetes.io/component: {}
          f:app.kubernetes.io/instance: {}
          f:app.kubernetes.io/managed-by: {}
          f:app.kubernetes.io/name: {}
          f:app.kubernetes.io/part-of: {}
          f:app.kubernetes.io/version: {}
      f:spec:
        f:rules: {}
        f:tls: {}
    manager: okhttp
    operation: Update
    time: "2020-08-07T09:33:18Z"
  - apiVersion: networking.k8s.io/v1beta1
    fieldsType: FieldsV1
    fieldsV1:
      f:status:
        f:loadBalancer:
          f:ingress: {}
    manager: nginx-ingress-controller
    operation: Update
    time: "2020-08-07T09:33:19Z"
  name: dummy-instance
  namespace: dummy-namespace
  resourceVersion: "1887"
  selfLink: /apis/extensions/v1beta1/namespaces/dummy-namespace/ingresses/dummy-instance
  uid: 2b7839fa-da65-45f3-9f1f-8169cf1325d8
spec:
  rules:
  - host: minikube
    http:
      paths:
      - backend:
          serviceName: dummy-instance
          servicePort: 9999
        path: /dummy-instance
        pathType: ImplementationSpecific
  tls:
  - hosts:
    - minikube
    secretName: minikube-tls-3
status:
  loadBalancer:
    ingress:
    - ip: 172.17.0.3

我看不出 Ingress return 同一主机、同一端点、不同客户端的不同证书的原因。

我唯一的猜测是密钥中包含的证书与 fabric8 ClientHello（此处为 okhttp3）不兼容（或者密码的优先级较低？），但事实并非如此。

我运行没有调试的想法，所以如果你对此有猜测，欢迎！

Answer 1

客户端未在 ClientHello 上发送 SNI 扩展。

Kubernetes Ingress return fabric8 证书与 curl 证书不同

Kubernetes Ingress return different certificate with fabric8 than with curl

fabric8

kubernetes

kubernetes-ingress