salt/minion/cert/proxy/pki.yml

parameters:
  salt:
    minion:
      cert:
        proxy:
          key_file:   /srv/salt/pki/${_param:cluster_name}/${salt:minion:cert:proxy:common_name}.key
          cert_file:  /srv/salt/pki/${_param:cluster_name}/${salt:minion:cert:proxy:common_name}.crt
          all_file:   /srv/salt/pki/${_param:cluster_name}/${salt:minion:cert:proxy:common_name}-chain-with-key.pem