Los pods no pueden comunicarse con FQDN en un entorno de proxy

Descripción

In a proxy environment, if the proxy server uses the same port as the TCP port of any other service in the Istio service mesh, such as port 8080, pods cannot communicate with the FQDN. The issue causes the following error:

System.Net.Http.HttpRequestException: The proxy tunnel request to proxy 'http://<proxyFQDN>:8080/' failed with status code '404'.

Solución

Para solucionar el problema, debes crear un ServiceEntry, como se muestra en el siguiente ejemplo:

apiVersion: networking.istio.io/v1beta1
kind: ServiceEntry
metadata:
  name: proxy
  namespace: <uipath>
spec:
  hosts:
  - <proxy-host>
  addresses:
  - <proxy-ip>/32
  ports:
  - number: <proxy-port>
    name: tcp
    protocol: TCP
  location: MESH_EXTERNAL