Simple ansible inventory without ec2.py

inventory.py

#!/usr/bin/python

import boto3
import json
import os

client = boto3.client('ec2')

# filter.json
# [
#   {
#     "Name": "tag:type",
#     "Values": ["utility"]
#   },
#   {
#     "Name": "tag:app_project",
#     "Values": ["appeals"]
#   },
#   {
#     "Name": "tag:app_group",
#     "Values": ["dsva"]
#   },
#   {
#     "Name": "vpc-id",
#     "Values": ["vpc-b9e418dc"]
#   }
# ]


filter_file_name = os.getenv('EC2_FILTER_FILE', 'filter.json')
with open(filter_file_name) as filter_file:
  filter_data= json.load(filter_file)

response = client.describe_instances(
  Filters=filter_data
)

ec2_url = []
for resv in response['Reservations']:
  for instance in resv['Instances']:
    ec2_url.append(instance['PrivateDnsName'])

print json.dumps({
  'all' : { 
    'hosts' : ec2_url
  }
})