To obtain a full listing of all of the key pairs that are used to trigger configuration changes through the ovm-template-config configuration modules, run the following command on the guest system where ovm-template-config is installed:

# ovm-template-config --human-readable --enumerate configure

The output from this command is printed as a Python data structure, that is easy to parse and understand. Content can be limited to the information specific to a configuration module by using the --script parameter as presented below:

# ovm-template-config --human-readable --enumerate configure --script datetime        
        [('50',
  'datetime',
  [{u'description': u'System date and time in format year-month-day-hour-minute-second, e.g.,
                     "2011-4-7-9-2-42".',
    u'hidden': True,
    u'key': u'com.oracle.linux.datetime.datetime'},
   {u'description': u'System time zone, e.g., "America/New_York".',
    u'hidden': True,
    u'key': u'com.oracle.linux.datetime.timezone'},
   {u'description': u'Whether to keep hardware clock in UTC: True or False.',
    u'hidden': True,
    u'key': u'com.oracle.linux.datetime.utc'},
   {u'description': u'Whether to enable NTP service: True or False.',
    u'hidden': True,
    u'key': u'com.oracle.linux.datetime.ntp'},
   {u'description': u'NTP servers separated by comma, e.g., 
                     "time.example.com,0.example.pool.ntp.org".',
    u'hidden': True,
    u'key': u'com.oracle.linux.datetime.ntp-servers'},
   {u'description': u'Whether to enable NTP local time source: True or False.',
    u'hidden': True,
    u'key': u'com.oracle.linux.datetime.ntp-local-time-source'}])]

From the output, it becomes clear as to which configuration modules are triggered at which runlevel and what keys and values they accept. Note that all key names are structured so that they are prefixed with com.oracle, to avoid conflicts with any custom modules that you may intend to develop for your own purposes.

Key value pairs are actually passed to ovm-template-config in JSON format:

{"com.oracle.linux.datetime.ntp":"True"}
{"com.oracle.linux.datetime.ntp-servers":"0.pool.ntp.org,1.pool.ntp.org,2.pool.ntp.org"}
{"com.oracle.linux.root-password":"mysecret"}