Chapter 5. Populating your private automation hub container registry By default, private automation hub does not include container images. To populate your container registry, you must push a container image to it. You must follow a specific workflow to populate your private automation hub container registry: Pull images from the Red Hat Ecosystem Catalog (registry.redhat.io) Tag them Push them to your private automation hub container registry Important As of April 1st, 2025 , quay.io is adding three additional endpoints. As a result, customers must adjust the allow/block lists within their firewall systems lists to include the following endpoints: cdn04.quay.io cdn05.quay.io cdn06.quay.io To avoid problems pulling container images, customers must allow outbound TCP connections (ports 80 and 443) to the following hostnames: cdn.quay.io cdn01.quay.io cdn02.quay.io cdn03.quay.io cdn04.quay.io cdn05.quay.io cdn06.quay.io This change should be made to any firewall configuration that specifically enables outbound connections to registry.redhat.io or registry.access.redhat.com . Use the hostnames instead of IP addresses when configuring firewall rules. After making this change, you can continue to pull images from registry.redhat.io or registry.access.redhat.com . You do not require a quay.io login, or need to interact with the quay.io registry directly in any way to continue pulling Red Hat container images. For more information, see Firewall changes for container image pulls 2024/2025 . Ensure that the Network ports and protocols listed in Table 6.4. Execution Environments (EE) are available to avoid problems pulling container images. 5.1. Pulling images for use in automation hub Before you can push container images to your private automation hub, you must first pull them from an existing registry and tag them for use. The following example details how to pull an image from the Red Hat Ecosystem Catalog (registry.redhat.io). Prerequisites You have permissions to pull images from registry.redhat.io. Procedure Log in to Podman by using your registry.redhat.io credentials: USD podman login registry.redhat.io Enter your username and password. Pull a container image: USD podman pull registry.redhat.io/ <container_image_name> : <tag> Verification To verify that the image you recently pulled is contained in the list, take these steps: List the images in local storage: USD podman images Check the image name, and verify that the tag is correct. Additional resources See Red Hat Ecosystem Catalog Help for information on registering and getting images. 5.2. Tagging images for use in automation hub After you pull images from a registry, tag them for use in your private automation hub container registry. Prerequisites You have pulled a container image from an external registry. You have the FQDN or IP address of the automation hub instance. Procedure Tag a local image with the automation hub container repository: USD podman tag registry.redhat.io/ <container_image_name> : <tag> <automation_hub_hostname> / <container_image_name> Verification List the images in local storage: USD podman images Verify that the image you recently tagged with your automation hub information is contained in the list. 5.3. Pushing a container image to private automation hub You can push tagged container images to private automation hub to create new containers and populate the container registry. Prerequisites You have permissions to create new containers. You have the FQDN or IP address of the automation hub instance. Procedure Log in to Podman using your automation hub location and credentials: USD podman login -u= <username> -p= <password> <automation_hub_url> Push your container image to your automation hub container registry: USD podman push <automation_hub_url> / <container_image_name> Troubleshooting The push operation re-compresses image layers during the upload, which is not guaranteed to be reproducible and is client-implementation dependent. This may lead to image-layer digest changes and a failed push operation, resulting in Error: Copying this image requires changing layer representation, which is not possible (image is signed or the destination specifies a digest) . Verification Log in to your automation hub. Navigate to Container Registry . Locate the container in the container repository list.

Commands:
podman login registry.redhat.io
podman pull registry.redhat.io/ <container_image_name> : <tag>
podman images
podman tag registry.redhat.io/ <container_image_name> : <tag> <automation_hub_hostname> / <container_image_name>
podman images
podman login -u= <username> -p= <password> <automation_hub_url>
podman push <automation_hub_url> / <container_image_name>