Regenerate compile master certs

From time to time, you may encounter a situation in which you need to regenerate a certificate for a compile master. Perhaps there is a security vulnerability in your infrastructure that you can remediate with a certificate regeneration, or maybe you're receiving strange SSL errors on your compile master that are preventing you from performing normal operations.

1. Log into the master of masters (MoM) as root.
2. On the MoM, run puppet cert clean <COMPILE MASTER HOSTNAME>.
3. Log into the compile master node as root.
4. Back up the /etc/puppetlabs/puppet/ssl/ directory. Run cp -r /etc/puppetlabs/puppet/ssl/ /etc/puppetlabs/puppet/ssl_bak/.
   If something goes wrong, you can restore this directory to keep your deployment functioning.
5. Stop the Puppet agent, MCollective, and PXP agent services.

   puppet resource service puppet ensure=stopped
   puppet resource service pe-puppetserver ensure=stopped
   puppet resource service mcollective ensure=stopped
   puppet resource service pxp-agent ensure=stopped			 

6. Delete the compile master's SSL directory. Run rm -rf /etc/puppetlabs/puppet/ssl.
7. Remove the compile master's cached catalog. Run rm -f /opt/puppetlabs/puppet/cache/client_data/catalog/<CERT NAME>.json.
8. Re-start the Puppet agent service and manually trigger a Puppet run, or wait for the next automatically scheduled run. 

   puppet resource service puppet ensure=running		 

9. Log into the MoM as root.
10. On the MoM, sign the compile master's certificate request. Run puppet cert --allow-dns-alt-names sign <compile master hostname>.
11. Log into the compile master as root.
12. Run Puppet.
    PE performs a full catalog run, and the compile master will resume its role in your PE deployment.