I 'm trying to pull an image from a private registry. But the status of pod is 'ImagePullBackOff', which means I need to add a secret to the pod.

Events:
  Type     Reason   Age                  From                                          Message
  ----     ------   ----                 ----                                          -------
  Normal   Pulling  52m (x255 over 22h)  kubelet, cn-huhehaote.i-hp3fkfzlcf1u9cigq2h7  pulling image "xxx/fcp"
  Normal   BackOff  8m (x5597 over 22h)  kubelet, cn-huhehaote.i-hp3fkfzlcf1u9cigq2h7  Back-off pulling image "xxx/fcp"
  Warning  Failed   3m (x5618 over 22h)  kubelet, cn-huhehaote.i-hp3fkfzlcf1u9cigq2h7  Error: ImagePullBackOff

So I added the following code in pod yaml.

spec:
      containers:
      - name: private-reg-container
        image: <your-private-image>
      imagePullSecrets:
      - name: my-secret

Then I got

error: map: map[] does not contain declared merge key: name

The solution I searched out is to delete 'imagePullSecret', which doesn't work for me. I wonder how to fix the error. Can anyone help me?

kubectl version is

 kubectl version
Client Version: version.Info{Major:"1", Minor:"11", GitVersion:"v1.11.5", GitCommit:"753b2dbc622f5cc417845f0ff8a77f539a4213ea", GitTreeState:"clean", BuildDate:"2018-11-26T14:41:50Z", GoVersion:"go1.10.3", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"11", GitVersion:"v1.11.5", GitCommit:"753b2dbc622f5cc417845f0ff8a77f539a4213ea", GitTreeState:"clean", BuildDate:"2018-11-26T14:31:35Z", GoVersion:"go1.10.3", Compiler:"gc", Platform:"linux/amd64"}