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Configure an Imagestream in OpenShift 4

Hey, Gurus! Welcome to the lab. Here is the scenario. You are an admin working at the ZLand BioTech firm where you are in charge of creating early screening software that is going to revolutionize the industry for tracking symptoms of the dreaded Virus Z-19. This software is vital to the early warning system and the tracking of the virus. Your job is to assist the developers in managing and creating the applications that make up the screening and tracking software. Your first task is to help the lead developer mitigate an issue the software is having with the version of the Ruby imagestream they are using. The latest version is pointed at Ruby 2.6, and the developer's code was written for 2.5. You must change the `latest` tag to point to the Ruby 2.5 imagestream, and then tag the Ruby 2.6 imagestream with the `test` tag. This way, they can re-deploy and properly test. They would then like to switch it back later after testing and remove the `test` tag. Let's begin! ***NOTE: This lab is meant to be run in your local environment. This will not work in our current Cloud Playground or Lab environment.***

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Path Info

Clock icon Intermediate
Clock icon 15m
Clock icon Mar 05, 2021

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Table of Contents

  1. Challenge

    Install CodeReady Containers

    Note: If you have taken any of the other labs in the associated course and already installed CodeReady Containers, please move on to the Tag Images objective. If not, then proceed with this objective.

    If you don't already have a Red Hat login, register at

    • Make the OpenShift_CRC working directory.
    • Download the version of the OpenShift on CodeReady Containers binary for the operating system version you are running.
    • Install OpenShift on CodeReady Containers.
  2. Challenge

    Tag Images

    • First, tag the Ruby 2.5 imagestream, found in the OpenShift project, with the latest tag.
    • Next, tag the Ruby 2.6 imagestream, found in the OpenShift project, with the test tag.
    • Verify your work.
  3. Challenge

    Clean Up

    • Switch the imagestream for ruby:2.6 to the latest tag.
    • Delete the test tag.

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