Comment 20 for bug 1893263

I was able to fix the issue I was having by forcing the hostname in /etc/felix/felix.cfg using the property:

FelixHostname = <full_hostname>

I've successfully validated bionic-stein and bionic-train, however, I cannot install the calico packages on focal:

root@juju-3294b7-calico-ussuri-6:/home/ubuntu# add-apt-repository ppa:project-calico/calico-3.17
 This PPA contains packages for Calico's 3.17.x release series, mainly to support OpenStack-based systems (although the Felix package can be used stand-alone). It will be updated with patch releases for that series.
 More info: https://launchpad.net/~project-calico/+archive/ubuntu/calico-3.17
Press [ENTER] to continue or Ctrl-c to cancel adding it.

Hit:1 http://nova.clouds.archive.ubuntu.com/ubuntu focal InRelease
Hit:2 http://nova.clouds.archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:3 http://nova.clouds.archive.ubuntu.com/ubuntu focal-backports InRelease
Hit:4 http://security.ubuntu.com/ubuntu focal-security InRelease
Ign:5 http://ppa.launchpad.net/project-calico/calico-3.17/ubuntu focal InRelease
Err:6 http://ppa.launchpad.net/project-calico/calico-3.17/ubuntu focal Release
  404 Not Found [IP: 91.189.95.83 80]
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/project-calico/calico-3.17/ubuntu focal Release' does not have a Release file.
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.