botoを使って自身のinstanceのタグを得る

resolv.py

#! /user/bin/env python

from subprocess import check_cal
import urllib2
import boto.ec2

f = urllib2.urlopen('http://169.254.169.254/latest/meta-data/instance-id')
id = f.readline()

region = boto.ec2.get_region('us-west-2')
conn = region.connect()

instance = conn.get_all_instances(instance_ids=[id])[0].instances[0]
name = instance.tags['Name']

check_call(["hostname",name])