yum package installation from Custom repositories fails with error "No key found in given key data"

Solution Verified - Updated -

Issue

  • yum package installation from custom product/repositories fails with error No key found in given key data
  • Package installation from custom repositories fails with error
... SNIP ...
Downloading Packages:
warning: rpmts_HdrFromFdno: Header V3 RSA/SHA256 Signature, key ID 0608b895: NOKEY
Retrieving key from https://satellite.example.com/katello/api/repositories/11/gpg_key_content
Invalid GPG Key from https://satellite.example.com/katello/api/repositories/11/gpg_key_content: No key found in given key data

Environment

  • Red Hat Satellite 6
  • Custom Product/Repository with packages signed using custom GPG key

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