I’ve noticed I’m getting GPG errors as well with the latest Foreman 3.17 signing key and some of the katello packages, for example…
Importing GPG key 0xD6AB9AD1:
Userid : "Foreman Automatic Signing Key (3.17) <packages@theforeman.org>"
Fingerprint: 2C21 9CE8 AC0A 3BA2 EDE8 B652 509E 3BD3 D6AB 9AD1
From : https://REDACTED/katello/api/v2/repositories/22/gpg_key_content
Is this ok [y/N]: y
Key import failed (code 2). Failing package is: katello-host-tools-4.5.0-2.el8.noarch
GPG Keys are configured as: https://REDACTED/katello/api/v2/repositories/22/gpg_key_content
Public key for katello-host-tools-tracer-4.5.0-2.el8.noarch.rpm is not installed. Failing package is: katello-host-tools-tracer-4.5.0-2.el8.noarch
GPG Keys are configured as: https://REDACTED/katello/api/v2/repositories/22/gpg_key_content
The downloaded packages were saved in cache until the next successful transaction.
You can remove cached packages by executing 'dnf clean packages'.
Error: GPG check FAILED
Verified that the 3.17 signing key is the one being served at https://REDACTED/katello/api/v2/repositories/22/gpg_key_content
REDACTED of course being the real host name of my proxy. 