I'm struggling with the next step though. puppetserver and puppetdb are running, and they seem fine. To test it I spinned up a VM, installed openvox puppet agent, wrote the configuration, and now I'm gettnig this:

root@tst:/opt/puppetlabs/puppet/cache# /opt/puppetlabs/puppet/bin/puppet agent -tv
Error: certificate verify failed [unable to get local issuer certificate for CN=puppet.ppt.svc.cluster.local]
Error: certificate verify failed [unable to get local issuer certificate for CN=puppet.ppt.svc.cluster.local]