title: Kubernetes not pulling image from private registry
body: <p>I am trying to deploy an image from my private registry (harbor) to my Kubernetes environment. The registry was set up successfully and already contains my image. </p>
  
  <p>To give context this is my deployment file:</p>
  
  <pre><code>apiVersion: extensions/v1beta1
  kind: Deployment
  metadata:
    labels:
      name: sps-app
    name: sps-app
  spec:
    replicas: 1
    template:
      metadata:
        labels:
          name: sps-app
      spec:
        containers:
        - image: repo-harbor.test.com/sps_project/spsapp:23
          env:
          - name: MONGODB_URL
            value: "mongodb://mongo.default.svc.cluster.local:27017/user"
          name: sps-app
          ports:
          - containerPort: 4000
            name: sps-app
        imagePullSecrets:
        - name: harbor 
  </code></pre>
  
  <p>I already had create my harbor secret using the below command</p>
  
  <pre><code>kubectl create secret docker-registry harbor \
  --docker-server=https://repo-harbor.test.com \
  --docker-username=admin \
  --docker-password='xxxxxx!'
  </code></pre>
  
  <p>However, when I do a <code>kubectl apply -f</code> of my deployment, it always goes into an image pull backoff. </p>
  
  <p>Upon further investigation, I checked the logs of the pod and it states there is a x509 certification error. </p>
  
  <p>Kubernetes events:</p>
  
  <pre><code>Events:
    Type     Reason          Age              From                                           Message
    ----     ------          ----             ----                                           -------
    Normal   Scheduled       3m               default-scheduler                              Successfully assigned default/private-image-test-1 to df56bd02-5e0e-4644-a565-c233ac2404fe
    Normal   Pulling         2m (x3 over 3m)  kubelet, df56bd02-5e0e-4644-a565-c233ac2404fe  pulling image "jur01-harbor.acepod.com/sps_project/spsapp:2"
    Warning  Failed          2m (x3 over 3m)  kubelet, df56bd02-5e0e-4644-a565-c233ac2404fe  Failed to pull image "jur01-harbor.acepod.com/sps_project/spsapp:2": rpc error: code = Unknown desc = Error response from daemon: Get https://jur01-harbor.acepod.com/v2/: x509: certificate signed by unknown authority
    Warning  Failed          2m (x3 over 3m)  kubelet, df56bd02-5e0e-4644-a565-c233ac2404fe  Error: ErrImagePull
    Warning  Failed          2m (x4 over 3m)  kubelet, df56bd02-5e0e-4644-a565-c233ac2404fe  Error: ImagePullBackOff
    Normal   SandboxChanged  2m (x7 over 3m)  kubelet, df56bd02-5e0e-4644-a565-c233ac2404fe  Pod sandbox changed, it will be killed and re-created.
    Normal   BackOff         2m (x5 over 3m)  kubelet, df56bd02-5e0e-4644-a565-c233ac2404fe  Back-off pulling image "jur01-harbor.acepod.com/sps_project/spsapp:2"
  </code></pre>
  
  <p>At this point, I'm not sure how to resolve this. Would anyone how to resolve this?</p>