I’m trying to install Icinga2 on an Ubuntu server, however apt keeps complaining about a missing public key for the repository:
Err:5 https://packages.icinga.com/ubuntu icinga-focal InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY C6E319C334410682 Reading package lists... Done W: GPG error: https://packages.icinga.com/ubuntu icinga-focal InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY C6E319C334410682 E: The repository 'https://packages.icinga.com/ubuntu icinga-focal InRelease' is not signed. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details.
I followed the directions on packages.icinga.com/ubuntu, imported the archive key as described and created the repository file.
The mentioned public key is also unavailable on https://keyserver.ubuntu.com/
Am I missing something or is there an issue with the repo key?