title: Kubernetes service not creating endpoint despite selector
body: <p>I am sure I am missing something clear as day, but here goes. I have a frontend and backend being deployed behind an Nginx ingress. The requests to the backend were timing out, so I tested with a <code>curl</code> pod. I found that I was able to hit the pods directly, but not the service. This led me to run:</p>
  <pre class="lang-sh prettyprint-override"><code>&gt; kubectl get endpoints
  
  NAME                                               ENDPOINTS                        AGE
  backend-api                                        &lt;none&gt;                           10m
  kubernetes                                         167.99.101.163:443               121d
  nginx-ingress-ingress-nginx-controller             10.244.0.17:80,10.244.0.17:443   96m
  nginx-ingress-ingress-nginx-controller-admission   10.244.0.17:8443                 96m
  vue-frontend                                       10.244.0.24:80                   84m
  </code></pre>
  <p>No endpoints... I recall (from when I initially set this deployment up) that this usually has to do with selectors. I have checked and checked and checked, but I swear I have it set up correctly. Clearly not though.</p>
  <pre class="lang-yaml prettyprint-override"><code>## api-deployment.yaml
  ---
  apiVersion: apps/v1
  kind: Deployment
  metadata:
    name: backend-api
    labels:
      app: backend-api
  spec:
    replicas: 2
    selector:
      matchLabels:
        app: backend-api
    template:
      metadata:
        labels:
          app: backend-api
      spec:
        containers:
        - name: backend-api
          image: us.gcr.io/container-registry-276104/backend-api:0.88
          ports:
          - containerPort: 8080
          env:
          ...
  </code></pre>
  <pre class="lang-sh prettyprint-override"><code>&gt; kubectl get pods --show-labels
  NAME                                                      READY   STATUS    RESTARTS   AGE   LABELS
  backend-api-76d6d4f4c9-drbmn                              1/1     Running   0          85m   app=backend-api,pod-template-hash=76d6d4f4c9
  backend-api-76d6d4f4c9-qpbhk                              1/1     Running   0          85m   app=backend-api,pod-template-hash=76d6d4f4c9
  curl-curlpod-7b46d7776f-jkt6f                             1/1     Running   0          47m   pod-template-hash=7b46d7776f,run=curl-curlpod
  nginx-ingress-ingress-nginx-controller-5475c95bbf-psmzr   1/1     Running   0          97m   app.kubernetes.io/component=controller,app.kubernetes.io/instance=nginx-ingress,app.kubernetes.io/name=ingress-nginx,pod-template-hash=5475c95bbf
  vue-frontend-6dbf68446f-pzv5h                             1/1     Running   0          85m   app=vue-frontend,pod-template-hash=6dbf68446f
  </code></pre>
  <p>and the service:</p>
  <pre class="lang-yaml prettyprint-override"><code>## api-service.yaml
  ---
  apiVersion: v1
  kind: Service
  metadata:
    name: backend-api
  spec:
    selector:
      app: backend-api
    ports:
    - port: 8080
      protocol: TCP
      targetPort: http
    publishNotReadyAddresses: true
  </code></pre>
  <p>Help is, of course, appreciated :) I normally beat my head against the wall for hours, but I'm learning to work smarter, not harder!</p>
  <p>Happy to answer any questions - thanks in advance!</p>