Table of Contents

1. Challenge

   Install Podman Using yum or Application Streams

   1. Install podman on your RHEL server using yum. Alternatively, you can use Application Streams to install the container-tools package stream.

   Note: If you use Application Streams, make sure you use the default stream.

   2.We need to add 'localhost' to the empty line for [registries.insecure] in the /etc/containers/registries.conf file to specify our local container registry as an insecure registry. You'll need to do this using sudo.

2. Challenge

   Start the Local Container Image Registry

   1. A local container image registry has been pre-configured on your server. Before we can use it, we need to start it.
   2. Run the script (registry.sh), provided in the cloud_user home directory. Run this script with sudo, as it requires root privilages.
3. Challenge

   Manage Container Images Using Podman

   The podman command comes with quite a bit of container management functionality included. Let's try the following:

   1. Check your installed version of podman
   2. Check out the help information on the podman command
   3. Check out the help information on the podman image command
   4. Use podman to search for the ubi:latest container images
   5. Use podman to pull a copy of the registry.access.redhat.com/ubi8/ubi:latest container image
   6. Compare the podman images command to the podman image list command
   7. Compare the podman inspect ubi command to the podman image inspect ubi command
   8. Add the myubi tag to the ubi:latest image
   9. List our container images again
   10. Log in to the local container inage registry at localhost:5000
   11. Push the ubi:latest image in our local container image storage to the registry running on our lab server
       • Tag the ubi:latest image with the target of localhost:5000/ubi8/ubi
       • Push the image to localhost:5000/ubi8/ubi:latest
         • Use the --remove-signatures switch
   12. Check the local registry's contents using curl -u cloud_user https://localhost:5000/v2/_catalog and the cloud_user password
   13. Remove the myubi tag
   14. List our container images again
   15. Remove the image with no tags using the imageID
   16. List our container images again
   17. Use podman to search our local registry
   18. Using podman, log out of the local container registry
4. Challenge

   Manage Container Images Using Skopeo

   Even though the podman command can be used to perform container image management, taking things to the next level requires skopeo. Let's try the following with skopeo:

   1. Check your installed version of skopeo
   2. Check out the help information on the skopeo command
   3. Check out the help information on the skopeo inspect command
   4. Use skopeo to log in to the local container image registry at localhost:5000
   5. Use skopeo to copy a container image directly from docker://registry.access.redhat.com/ubi7/ubi:latest to our local registry (docker://localhost:5000/ubi7/ubi)
   6. Check the local registry's contents using curl -u cloud_user https://localhost:5000/v2/_catalog and the cloud_user password
   7. Use skopeo to sync a container image from docker://registry.access.redhat.com/ubi7/ubi:latest to our local registry (docker://localhost:5000/ubi7/ubi)
   8. Use skopeo to inspect the ubi7 and ubi8 images on the local container registry
   9. Use skopeo to list the tags on the ubi7 and ubi8 images on the local container registry
   10. Use podman to search our local registry (localhost:5000/ubi)
   11. Use skopeo to log out of the local container image registry at localhost:5000