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Install puppet on Centos you should enable reposiotry

rpm -ivh https://yum.puppetlabs.com/el/6.5/products/x86_64/puppetlabs-release-6-10.noarch.rpm 
yum install puppet-server 
 
 
vi /etc/puppet/puppet.conf # Edit(and add) dns_alt_names = serv,puppet...
service puppetmaster start 
 
#Sign cer
puppet cert list 
puppet cert sign "pp-c01.test01.devops.somewhere.com"
mkdir -p /etc/puppet/manifests 
vi /etc/puppet/manifests/site.pp
service puppetmaster restart 
puppet cert list 
 
puppet master --configprint certname
vi /etc/puppet/puppet.conf
service puppetmaster stop
find $(puppet master --configprint ssldir) -name "$(puppet master --configprint certname).pem" -delete
puppet master --no-daemonize --verbose
service puppetmaster start

Good guide:

http://docs.puppetlabs.com/guides/troubleshooting.html?_ga=1.151383225.1480551404.1440070296#agents-are-failing-with-a-hostname-was-not-match-with-the-server-certificate-error-whats-wrong