The bootstrap process assumes that the following packages are installed:
If they are not installed, the bootstrap process will end up referring to external yum repositories in order to resolve them. This may or may not end up successfully, depending on the availability of these repositories.
These packages appear to be pre-installed on standard CentOS / RHEL images. However, they don't exist on the CentOS Minimal image, and may not exist in certain customer-hardened images.
IMPORTANT: To test this properly, access to yum repositories should be disabled. This can be achieved by resolving CFY-7420.