A series of upgrades and changes have left instances with 'role::puppetmaster::standalone' applied in a broken state.  This is unfortunate because Puppet is unable to fix itself.  There is a small manual update required.

On the project specific puppet master (instance with role::puppetmaster:;standalone applied):

0. Make sure your copy of the operation puppet repo is current at /var/lib/git/operations/puppet
1. edit /etc/puppet/puppet.conf to replace 'default_manifest = $confdir/manifests/site.pp' with 'default_manifest = $confdir/manifests/'
2. restart apache (service apache2 restart)
3. puppet agent --test

Puppet should now able to fix itself and clients should run fine.  Places where this role is applied can be found at https://tools.wmflabs.org/openstack-browser/puppetclass/role::puppetmaster::standalone

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Chase Pettet
chasemp on phabricator and IRC