Connected Setup

Red Hat Docs

The connected Linux machine will need to be able to run provided tools and access specific registries.

• The current CDN access needed for the mirror host:

  Red Hat KCS, Red Hat Docs

  URL	Port	Function
  registry.redhat.io	443	Provides core container images
  access.redhat.com	443	Hosts a signature store that a container client requires for verifying images pulled from registry.access.redhat.com. In a firewall environment, ensure that this resource is on the allowlist.
  registry.access.redhat.com	443	Hosts all the container images that are stored on the Red Hat Ecosystem Catalog, including core container images.
  quay.io	443	Provides core container images
  cdn.quay.io	443	Provides core container images
  cdn01.quay.io	443	Provides core container images
  cdn02.quay.io	443	Provides core container images
  cdn03.quay.io	443	Provides core container images
  cdn04.quay.io	443	Provides core container images
  cdn05.quay.io	443	Provides core container images
  cdn06.quay.io	443	Provides core container images
  sso.redhat.com	443	https://cloud.redhat.com/openshift site uses authentication from sso.redhat.com.
  mirror.openshift.com	443	Required to access mirrored installation content and images.

The general flow of a disconnected OpenShift install starts with:

1. Download the required tools from Red Hat.
2. Create an image set configuration file defining what you want to mirror.
3. Mirror an image set to disk using oc mirror.
4. Transfer the image set and associated tools to the target environment.