hostname param for slave

[Satyanarayana Jampa]

Hi,
    I have written a Ambari service which is a slave component.
    In this service, I have a template which is my configuration file. This 
file needs the "hostname" as one of its field.
   Example template below:
        host = '<HOSTNAME>'
      accesslog = '/opt/purple/accesslog.out'
       errorlog = '/opt/purple/gunicorn.out'

    How can I get the HOSTNAME of the specific hosts on which the slave 
component is being installed in to the template file.

Thanks,
Satya.