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Editing File: /usr/share/doc/cloud-init/examples/part-handler-v2.txt

#part-handler
# vi: syntax=python ts=4
# this is an example of a version 2 part handler.
# the differences between the initial part-handler version
# and v2 is:
#  * handle_part receives a 5th argument, 'frequency'
#    frequency will be either 'always' or 'per-instance'
#  * handler_version must be set
#
# A handler declaring version 2 will be called on all instance boots, with a
# different 'frequency' argument.

handler_version = 2

def list_types():
    # return a list of mime-types that are handled by this module
    return(["text/plain", "text/go-cubs-go"])

def handle_part(data,ctype,filename,payload,frequency):
    # data: the cloudinit object
    # ctype: '__begin__', '__end__', or the specific mime-type of the part
    # filename: the filename for the part, or dynamically generated part if
    #           no filename is given attribute is present
    # payload: the content of the part (empty for begin or end)
    # frequency: the frequency that this cloud-init run is running for
    #            this is either 'per-instance' or 'always'.  'per-instance'
    #            will be invoked only on the first boot.  'always' will
    #            will be called on subsequent boots.
    if ctype == "__begin__":
       print "my handler is beginning, frequency=%s" % frequency
       return
    if ctype == "__end__":
       print "my handler is ending, frequency=%s" % frequency
       return

print "==== received ctype=%s filename=%s ====" % (ctype,filename)
    print payload
    print "==== end ctype=%s filename=%s" % (ctype, filename)

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