title: nginx-prometheus-exporter deployment failing
body: <p>I am trying to deploy <code>Nginx</code> with <code>nginx-prometheus-exporter</code>. Following is my deployment</p>
  
  <pre><code>apiVersion: apps/v1beta1
  kind: Deployment
  metadata:
    namespace: local
    name: nginx
  spec:
    replicas: 1
    template:
      metadata:
        labels:
          app: nginx
      spec:
        containers:
        - name: nginx
          image: nginx
          imagePullPolicy: Always
          ports:
          - name: nginx-port
            containerPort: 80
            protocol: TCP
          livenessProbe:
            httpGet:
              path: /
              port: nginx-port
              httpHeaders:
                - name: Host
                  value: KubernetesLivenessProbe
            initialDelaySeconds: 10
            timeoutSeconds: 1
            periodSeconds: 15
          readinessProbe:
            httpGet:
              path: /
              port: nginx-port
              httpHeaders:
                - name: Host
                  value: KubernetesLivenessProbe
            initialDelaySeconds: 3
            timeoutSeconds: 1
            periodSeconds: 8
          volumeMounts:
          - mountPath: /etc/nginx/conf.d/ # mount nginx-conf volume to /etc/nginx
            readOnly: true
            name: frontend-conf
        - name: nginx-exporter
          image: nginx/nginx-prometheus-exporter:0.3.0
          resources:
            requests:
              cpu: 100m
              memory: 100Mi
          ports:
          - name: nginx-ex-port
            containerPort: 9113
          args:
            - -nginx.scrape-uri=http://nginx.local.svc.cluster.local:80/stub_status
        volumes:
        - name: frontend-conf
          configMap:
            name: frontend-conf # place ConfigMap `nginx-conf` on /etc/nginx
            items:
              - key: frontend.local.conf
                path: frontend.local.conf 
  </code></pre>
  
  <p>Single container pod works, but fails when I add <code>nginx-prometheus-exporter</code> sidecar container. </p>
  
  <pre><code>mackbook: xyz$ kubectl logs nginx-6dbbdb64fb-8drmc -c nginx-exporter
  2019/05/14 20:17:48 Starting NGINX Prometheus Exporter Version=0.3.0 GitCommit=6570275
  2019/05/14 20:17:53 Could not create Nginx Client: Failed to create NginxClient: failed to get http://nginx.local.svc.cluster.local:80/stub_status: Get http://nginx.local.svc.cluster.local:80/stub_status: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
  </code></pre>
  
  <p>Also was able to <code>curl http://nginx.local.svc.cluster.local</code> from another container running in different namespace.</p>
  
  <p>Anyone know what's the correct way to specify  <code>-nginx.scrape-uri</code> ? </p>
  
  <p>From Nginx container </p>
  
  <pre><code>root@nginx-6fd866c4d7-t8wwf:/# curl localhost/stub_status
  &lt;html&gt;
  &lt;head&gt;&lt;title&gt;404 Not Found&lt;/title&gt;&lt;/head&gt;
  &lt;body&gt;
  &lt;h1&gt;404 Not Found&lt;/h1&gt;
  &lt;ul&gt;
  &lt;li&gt;Code: NoSuchKey&lt;/li&gt;
  &lt;li&gt;Message: The specified key does not exist.&lt;/li&gt;
  &lt;li&gt;Key: beta/stub_status&lt;/li&gt;
  &lt;li&gt;RequestId: 3319E5A424C7BA31&lt;/li&gt;
  &lt;li&gt;HostId: zVv5zuAyzqbB2Gw3w1DavEJwgq2sbgI8RPMf7RmPsNQoh/9ftxCmiSwyj/j6q/K3lxEEeUy6aZM=&lt;/li&gt;
  &lt;/ul&gt;
  &lt;hr/&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  root@nginx-6fd866c4d7-t8wwf:/#
  </code></pre>