title: Can access clusterip service from within cluster but not by using kubectl proxy
body: <p>I am trying to access a clusterip service (running kubernetes on my laptop through docker-for-mac).</p>
  
  <p>Following the <a href="https://hackernoon.com/getting-started-with-microservices-and-kubernetes-76354312b556" rel="nofollow noreferrer">instructions here</a>, I was able to successfully ping the service like this:</p>
  
  <pre><code>kubectl run curl --image=radial/busyboxplus:curl -i --tty
  curl -v http://10.106.1.204:8000/api/v0.1/predictions -d '{"foo": "bar"}' -H "Content-Type: application/json"
  </code></pre>
  
  <p>but I can't get it to work using the service name instead of it's ip. I then tried to use kubectl proxy <a href="https://medium.com/google-cloud/kubernetes-nodeport-vs-loadbalancer-vs-ingress-when-should-i-use-what-922f010849e0" rel="nofollow noreferrer">as described here</a>, but I can't get it to work:</p>
  
  <pre><code>kubectl proxy --port=8080 &amp;
  curl -v http://127.0.0.1:8080/api/v1/proxy/namespaces/deploy-test/services/10.106.1.204:8000/api/v0.1/predictions
  </code></pre>
  
  <p>that gives me a 404 error as do all of the following:</p>
  
  <pre><code>curl -v http://127.0.0.1:8080/api/v1/proxy/namespaces/deploy-test/services/10.106.1.204:8000
  curl -v http://127.0.0.1:8080/api/v1/proxy/namespaces/deploy-test/services/10.106.1.204:8000/predictions
  curl -v http://127.0.0.1:8080/api/v1/proxy/namespaces/deploy-test/services/10.106.1.204:8000/api/v0.1/predictions
  </code></pre>
  
  <p>as well as all combinations of replacing <code>8000</code> with <code>http</code> in all of the above and/or the ip with the service name.</p>
  
  <p>I can confirm that the proxy is working as <code>http://127.0.0.1:8080/api/v1/namespaces/deploy-test/pods</code> works.</p>
  
  <p>This is the description of the service. Note that I am specifically trying to access it via the clusterip and not use Ambassador.</p>
  
  <pre><code>kubectl describe svc -n deploy-test template-product-app-seldon-prediction-service
  Name:              template-product-app-seldon-prediction-service
  Namespace:         deploy-test
  Labels:            seldon-app=template-product-app-seldon-prediction-service
                     seldon-deployment-id=template-product-app-seldon-prediction-service
  Annotations:       getambassador.io/config:
                       ---
                       apiVersion: ambassador/v1
                       kind: Mapping
                       name: seldon_deploy-test_seldon-prediction-service_rest_mapping
                       prefix: /seldon/deploy-test/seldon-prediction-service/
                       service: template-product-app-seldon-prediction-service.deploy-test:8000
                       timeout_ms: 3000
                       ---
                       apiVersion: ambassador/v1
                       kind: Mapping
                       name: seldon_deploy-test_seldon-prediction-service_grpc_mapping
                       grpc: true
                       prefix: /seldon.protos.Seldon/
                       rewrite: /seldon.protos.Seldon/
                       service: template-product-app-seldon-prediction-service.deploy-test:5001
                       timeout_ms: 3000
                       headers:
                         namespace: deploy-test
                         seldon: seldon-prediction-service
                       retry_policy:
                         retry_on: connect-failure
                         num_retries: 3
  Selector:          seldon-app=template-product-app-seldon-prediction-service
  Type:              ClusterIP
  IP:                10.106.1.204
  Port:              http  8000/TCP
  TargetPort:        8000/TCP
  Endpoints:         10.1.1.4:8000
  Port:              grpc  5001/TCP
  TargetPort:        5001/TCP
  Endpoints:         10.1.1.4:5001
  Session Affinity:  None
  Events:            &lt;none&gt;
  </code></pre>
  
  <p>Any suggestions on how to do this via <code>kubectl proxy</code> instead of spinning up a pod with <code>radial/busyboxplus:curl</code>?</p>