On Client

rpm -ivh http://yum.puppetlabs.com/puppetlabs-release-el-7.noarch.rpm
yum update
yum install puppet
puppet --version
vim /etc/puppet/puppet.conf  # under agent section add the puppet master:   server = <puppetmaster.domain>
systemctl start puppet
systemctl status puppet
systemctl enable puppet 


On puppet master

#list client certificates and look for the new host
puppet cert list 

#sign the certificate
puppet cert sign  <machine.domain>