Comment 4 for bug 1429245

The other issue is the hardcoded "create schema" on the api recipe:
execute 'ironic db sync' do
  command 'ironic-dbsync --config-file /etc/ironic/ironic.conf create_schema'

This will fail on the second pass of a converge. It's would need to be changed to "upgrade".
From reading http://docs.openstack.org/developer/ironic/cmds/ironic-dbsync.html it would appear that "upgrade" is the right choice here.