Let's deploy an existing docker image

oc project -workspace

oc new-app sonatype/nexus:oss

--> Found container image 2913422 (12 months old) from Docker Hub for "sonatype/nexus:oss"

    Red Hat Universal Base Image 7
    ------------------------------
    The Universal Base Image is designed and engineered to be the base layer for all of your containerized applications, middleware and utilities. This base image is freely redistributable, but Red Hat only supports Red Hat technologies through subscriptions for Red Hat products.
This image is maintained by Red Hat and updated regularly.

    Tags: base rhel7

    * An image stream tag will be created as "nexus:oss" that will track this image
    * This image will be deployed in deployment config "nexus"
    * Port 8081/tcp will be load balanced by service "nexus"
      * Other containers can access this service through the hostname "nexus"
    * This image declares volumes and will default to use non-persistent, host-local storage.
      You can add persistent volumes later by running 'oc set volume dc/nexus --add ...'

--> Creating resources ...
    imagestream.image.openshift.io "nexus" created
    deploymentconfig.apps.openshift.io "nexus" created
    service "nexus" created
--> Success
    Application is not exposed. You can expose services to the outside world by executing one or more of the commands below:
     'oc expose svc/nexus'
    Run 'oc status' to view your app.