Before beginning with the actual setup and deployment of applications, we need to  understand some basic terms and concepts used in OpenShift V3. These are the basic building blocks of OpenShift, which are formed out of Docker images.  In each pod on OpenShift, the cluster has its own images running inside it. When we  configure a pod, we have a field which will get pooled from the registry. This configuration  file will pull the image and deploy it on the cluster node.  ContainersandImages  Images  apiVersion: v1 kind: pod metadata: name: Tesing_for_Image_pull -----------> Name of Pod  spec: containers: - name: neo4j-server ------------------------> Name of the image image: <Name of the Docker image>----------> Image to be pulled  imagePullPolicy: Always ------------->Image pull policy  command: [“echo”, “SUCCESS”] -------------------> Massage after image pull  In order to pull and create an image out of it, run the following command. OC is the client  to communicate with OpenShift environment after login.  $ oc create –f Tesing_for_Image_pull  23  $_{5.}$  OpenShift - Basic Concept 