To pull a private DockerHub hosted image from a Kubernetes YAML:

Run these commands:

```
DOCKER_REGISTRY_SERVER=docker.io
DOCKER_USER=Type your dockerhub username, same as when you `docker login`
DOCKER_EMAIL=Type your dockerhub email, same as when you `docker login`
DOCKER_PASSWORD=Type your dockerhub pw, same as when you `docker login`

kubectl create secret docker-registry myregistrykey \
  --docker-server=$DOCKER_REGISTRY_SERVER \
  --docker-username=$DOCKER_USER \
  --docker-password=$DOCKER_PASSWORD \
  --docker-email=$DOCKER_EMAIL
```

If your username on DockerHub is `DOCKER_USER`, and your private repo is called `PRIVATE_REPO_NAME`, and the image you want to pull is tagged as latest, create this `example.yaml` file:

```
apiVersion: v1
kind: Pod
metadata:
  name: whatever
spec:
  containers:
    - name: whatever
      image: DOCKER_USER/PRIVATE_REPO_NAME:latest
      imagePullPolicy: Always
      command: [ "echo", "SUCCESS" ]
  imagePullSecrets:
    - name: myregistrykey
```

Then run:

```
kubectl create -f example.yaml
```