Kubernetes nginx ingress controller to proxy remote basic auth. useful eg for kibana

ingress.yml

apiVersion: v1
kind: Service
metadata:
  name: external1
spec:
  type: ExternalName
  ports:
    - port: 80
      protocol: TCP
      targetPort: 9243
  externalName: some.remote.host

---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: ingress
  annotations:
    nginx.ingress.kubernetes.io/backend-protocol: "HTTPS" # allow http to https proxy
    kubernetes.io/ingress.class: nginx
    nginx.ingress.kubernetes.io/upstream-vhost: some.remote.host
    nginx.ingress.kubernetes.io/configuration-snippet: |
      proxy_set_header Authorization "Basic cHLobGlpMB1nHxpYw==";

spec:
  rules:
    - host: test-ingress.local.dev2
      http:
        paths:
          - backend:
              serviceName: external1
              servicePort: 80