Cannot perform a conversion on a Plesk server from CentOS 7 to Almalinux 8: missing_gpg_keys_inhibitor

Symptoms

• Cannot convert Plesk from CentOS 7 to Almalinux 8:

  CONFIG_TEXT: missing_gpg_keys_inhibitor

  CONFIG_TEXT: Detected unknown GPG keys for target system repositories

  CONFIG_TEXT: The following additional gpg keys are required to be imported during the upgrade:
  - https://repo.cloudlinux.com/kernelcare/RPM-GPG-KEY-KernelCare

Cause

Missing or broken GPG key from Kernelcare repository.

Resolution

1. Connect to the server via SSH.

2. Download and install the GPG key:

   # wget https://repo.cloudlinux.com/kernelcare/RPM-GPG-KEY-KernelCare
   # cp RPM-GPG-KEY-KernelCare /etc/pki/rpm-gpg/
   # cp /etc/pki/rpm-gpg/RPM-GPG-KEY-KernelCare /etc/leapp/files/vendors.d/rpm-gpg/

3. Resume the upgrade:

   # ./centos2alma --resume