Remove old version of the vpc-dns script.

Use underscore instead so that the file can be imported by other python scripts

util/vpc-tools/vpc-dns.py

-"""vpc-dns.py
-
-Usage:
-    vpc-dns.py create-zone (vpc <vpc_id> | stack-name <stack_name>)
-    vpc-dns.py (-h --help)
-    vpc-dns.py (-v --version)
-
-Options:
-    -h --help       Show this screen.
-    -v --version    Show version.
-"""
-import boto
-from boto.route53.record import ResourceRecordSets
-from docopt import docopt
-from vpcutil import vpc_for_stack_name
-
-class VPCDns:
-    BACKEND_ZONE = "Z4AI6ADZTL3HN"
-    DNS_SUFFIX = ".vpc.edx.org"
-    ZONE = "{name}" + DNS_SUFFIX
-
-    def __init__(self,vpc_id=None):
-        self.vpc_id = vpc_id
-        self.elb = boto.connect_elb()
-        self.r53 = boto.connect_route53()
-
-    def create_zone(self, vpc_id):
-        zone_name = self.ZONE.format(name=vpc_id)
-        print zone_name
-        hosted_zone = self.get_or_create_hosted_zone(zone_name)
-
-        elbs = self.elb.get_all_load_balancers()
-
-        for elb in [x for x in elbs if x.vpc_id == self.vpc_id]:
-            self.create_service_dns(elb,self.get_zone_id_from_retval(
-                hosted_zone.Id),self.vpc_id)
-
-    def get_zone_id_from_retval(self,retval):
-        """
-        The data structure returned by the create_hosted_zone call
-        pre-pends the string /hostedzone/ to the Id for some reason.
-        """
-        return retval.replace("/hostedzone/","")
-
-
-    def get_or_create_hosted_zone(self, zone_name):
-
-        hosted_zone = self.r53.get_hosted_zone_by_name(zone_name)
-
-        if not hosted_zone:
-            zone_data = self.r53.create_hosted_zone(zone_name,
-                                        comment="Created by automation.")
-            hosted_zone = self.r53.get_hosted_zone_by_name(zone_name)
-
-        return hosted_zone
-
-
-    def get_elb_service(self, elb):
-
-        services = ["edxapp","rabbit","xqueue","xserver","worker"]
-
-        for service in services:
-            if service in elb.dns_name.lower():
-                return service
-
-        raise Exception("No service mapping for " + elb.dns_name)
-
-
-    def create_service_dns(self, elb, zone, vpc_id):
-        """
-        """
-        records = self.r53.get_all_rrsets(zone)
-
-        old_names = [r.name for r in records]
-
-        HOST_TEMPLATE = "{service}.{vpc_id}" + self.DNS_SUFFIX
-
-        service = self.get_elb_service(elb)
-
-        dns_name = HOST_TEMPLATE.format(service=service,
-                                        vpc_id=vpc_id)
-
-        change_set = ResourceRecordSets()
-
-        if dns_name + '.' in old_names:
-            print "adding delete"
-            change = change_set.add_change(
-                'DELETE',
-                dns_name,
-                'CNAME',
-                600)
-
-            change.add_value(elb.dns_name)
-
-        change = change_set.add_change(
-            'CREATE',
-            dns_name,
-            'CNAME',
-            600 )
-
-        change.add_value(elb.dns_name)
-
-        print change_set.to_xml()
-
-        self.r53.change_rrsets(zone, change_set.to_xml())
-
-VERSION="0.1"
-
-def dispatch(args):
-    if args.get("vpc"):
-      vpc_id = args.get("<vpc_id>")
-    elif args.get("stack-name"):
-      stack_name = args.get("<stack_name>")
-      vpc_id = vpc_for_stack_name(stack_name)
-    else:
-      raise Exception("No vpc_id or stack_name provided.")
-
-    c = VPCDns(vpc_id=vpc_id)
-
-    if args.get("create-zone"):
-        c.create_zone(vpc_id)
-
-if __name__ == "__main__":
-    args = docopt(__doc__, version=VERSION)
-    dispatch(args)
-