5.1 Overview of the process 5.1.1 Provision your instance 5.1.2 Get a Docker image to run 5.1.3 Start your image 5.1.4 Access the provided service by the image 5.2 Get an image from Docker Hub 5.2.1 Download from Docker Hub This section reviews the process for getting an image running in your z/OS installation.  Detailed commands and descriptions can be found in the upcoming sections. To be able to start a Docker image, a running zCX instance is required. Detailed description  on how to configure and start a zCX instance can be found in the previous Chapter 4,  “Provisioning and managing your first z/OS Container” on page 49 Choose an available image on  hub.docker.com  matching the s390x architecture to  download into your zCX instance. Use of the Docker pull command downloads the selected  image to the local zCX directory. Start the downloaded image with the  docker run  command. To skip the previous step, you  can directly issue the  docker run  command. If the image is not available locally, Docker  automatically downloads the image from  hub.docker.com  and starts it, after the download is  complete. Depending on the service that is provided by the image, there are different ways to access  them. For the chosen example with the HTTP server, the website can be access via the  configured IP or DNS name from the zCX instance with the configured Port. There are three different ways to get an image from Docker Hub into the running zCX  instance. Both approaches are discussed in detail in this section. The simple way is to  download it directly from Docker Hub but that requires a connection to the internet.  When the system your zCX instance is running does have access to the internet, you can  directly download an image from  hub.docker.com . That command downloads the image into the zCX instance. Then, it is available to be started. docker pull nginx 98  Getting started with z/OS Container Extensions