#!/usr/bin/env python
'''
Windows Azure external inventory script
=======================================
Generates inventory that Ansible can understand by making API request to
Windows Azure using the azure python library.
NOTE: This script assumes Ansible is being executed where azure is already
installed.
pip install azure
Adapted from the ansible Linode plugin by Dan Slimmon.
'''
# (c) 2013, John Whitbeck
#
# This file is part of Ansible,
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
######################################################################
# Standard imports
import re
import sys
import argparse
import os
from urlparse import urlparse
from time import time
try:
import json
except ImportError:
import simplejson as json
try:
import azure
from azure import WindowsAzureError
from azure.servicemanagement import ServiceManagementService
except ImportError as e:
print("failed=True msg='`azure` library required for this script'")
sys.exit(1)
# Imports for ansible
import ConfigParser
class AzureInventory(object):
def __init__(self):
"""Main execution path."""
# Inventory grouped by display group
self.inventory = {}
# Index of deployment name -> host
self.index = {}
self.host_metadata = {}
# Cache setting defaults.
# These can be overridden in settings (see `read_settings`).
cache_dir = os.path.expanduser('~')
self.cache_path_cache = os.path.join(cache_dir, '.ansible-azure.cache')
self.cache_path_index = os.path.join(cache_dir, '.ansible-azure.index')
self.cache_max_age = 0
# Read settings and parse CLI arguments
self.read_settings()
self.read_environment()
self.parse_cli_args()
# Initialize Azure ServiceManagementService
self.sms = ServiceManagementService(self.subscription_id, self.cert_path)
# Cache
if self.args.refresh_cache:
self.do_api_calls_update_cache()
elif not self.is_cache_valid():
self.do_api_calls_update_cache()
if self.args.list_images:
data_to_print = self.json_format_dict(self.get_images(), True)
elif self.args.list or self.args.host:
# Display list of nodes for inventory
if len(self.inventory) == 0:
data = json.loads(self.get_inventory_from_cache())
else:
data = self.inventory
if self.args.host:
data_to_print = self.get_host(self.args.host)
else:
# Add the `['_meta']['hostvars']` information.
hostvars = {}
if len(data) > 0:
for host in set([h for hosts in data.values() for h in hosts if h]):
hostvars[host] = self.get_host(host, jsonify=False)
data['_meta'] = {'hostvars': hostvars}
# JSONify the data.
data_to_print = self.json_format_dict(data, pretty=True)
print(data_to_print)
def get_host(self, hostname, jsonify=True):
"""Return information about the given hostname, based on what
the Windows Azure API provides.
"""
if hostname not in self.host_metadata:
return "No host found: %s" % json.dumps(self.host_metadata)
if jsonify:
return json.dumps(self.host_metadata[hostname])
return self.host_metadata[hostname]
def get_images(self):
images = []
for image in self.sms.list_os_images():
if str(image.label).lower().find(self.args.list_images.lower()) >= 0:
images.append(vars(image))
return json.loads(json.dumps(images, default=lambda o: o.__dict__))
def is_cache_valid(self):
"""Determines if the cache file has expired, or if it is still valid."""
if os.path.isfile(self.cache_path_cache):
mod_time = os.path.getmtime(self.cache_path_cache)
current_time = time()
if (mod_time + self.cache_max_age) > current_time:
if os.path.isfile(self.cache_path_index):
return True
return False
def read_settings(self):
"""Reads the settings from the .ini file."""
config = ConfigParser.SafeConfigParser()
config.read(os.path.dirname(os.path.realpath(__file__)) + '/windows_azure.ini')
# Credentials related
if config.has_option('azure', 'subscription_id'):
self.subscription_id = config.get('azure', 'subscription_id')
if config.has_option('azure', 'cert_path'):
self.cert_path = config.get('azure', 'cert_path')
# Cache related
if config.has_option('azure', 'cache_path'):
cache_path = os.path.expandvars(os.path.expanduser(config.get('azure', 'cache_path')))
self.cache_path_cache = os.path.join(cache_path, 'ansible-azure.cache')
self.cache_path_index = os.path.join(cache_path, 'ansible-azure.index')
if config.has_option('azure', 'cache_max_age'):
self.cache_max_age = config.getint('azure', 'cache_max_age')
def read_environment(self):
''' Reads the settings from environment variables '''
# Credentials
if os.getenv("AZURE_SUBSCRIPTION_ID"):
self.subscription_id = os.getenv("AZURE_SUBSCRIPTION_ID")
if os.getenv("AZURE_CERT_PATH"):
self.cert_path = os.getenv("AZURE_CERT_PATH")
def parse_cli_args(self):
"""Command line argument processing"""
parser = argparse.ArgumentParser(
description='Produce an Ansible Inventory file based on Azure',
)
parser.add_argument('--list', action='store_true', default=True,
help='List nodes (default: True)')
parser.add_argument('--list-images', action='store',
help='Get all available images.')
parser.add_argument('--refresh-cache',
action='store_true', default=False,
help='Force refresh of thecache by making API requests to Azure '
'(default: False - use cache files)',
)
parser.add_argument('--host', action='store',
help='Get all information about an instance.')
self.args = parser.parse_args()
def do_api_calls_update_cache(self):
"""Do API calls, and save data in cache files."""
self.add_cloud_services()
self.write_to_cache(self.inventory, self.cache_path_cache)
self.write_to_cache(self.index, self.cache_path_index)
def add_cloud_services(self):
"""Makes an Azure API call to get the list of cloud services."""
try:
for cloud_service in self.sms.list_hosted_services():
self.add_deployments(cloud_service)
except WindowsAzureError as e:
print("Looks like Azure's API is down:")
print("")
print(e)
sys.exit(1)
def add_deployments(self, cloud_service):
"""Makes an Azure API call to get the list of virtual machines
associated with a cloud service.
"""
try:
for deployment in self.sms.get_hosted_service_properties(cloud_service.service_name,embed_detail=True).deployments.deployments:
self.add_deployment(cloud_service, deployment)
except WindowsAzureError as e:
print("Looks like Azure's API is down:")
print("")
print(e)
sys.exit(1)
def add_deployment(self, cloud_service, deployment):
"""Adds a deployment to the inventory and index"""
for role in deployment.role_instance_list.role_instances:
try:
# Default port 22 unless port found with name 'SSH'
port = '22'
for ie in role.instance_endpoints.instance_endpoints:
if ie.name == 'SSH':
port = ie.public_port
break
except AttributeError as e:
pass
finally:
self.add_instance(role.instance_name, deployment, port, cloud_service, role.instance_status)
def add_instance(self, hostname, deployment, ssh_port, cloud_service, status):
"""Adds an instance to the inventory and index"""
dest = urlparse(deployment.url).hostname
# Add to index
self.index[hostname] = deployment.name
self.host_metadata[hostname] = dict(ansible_ssh_host=dest,
ansible_ssh_port=int(ssh_port),
instance_status=status,
private_id=deployment.private_id)
# List of all azure deployments
self.push(self.inventory, "azure", hostname)
# Inventory: Group by service name
self.push(self.inventory, self.to_safe(cloud_service.service_name), hostname)
if int(ssh_port) == 22:
self.push(self.inventory, "Cloud_services", hostname)
# Inventory: Group by region
self.push(self.inventory, self.to_safe(cloud_service.hosted_service_properties.location), hostname)
def push(self, my_dict, key, element):
"""Pushed an element onto an array that may not have been defined in the dict."""
if key in my_dict:
my_dict[key].append(element);
else:
my_dict[key] = [element]
def get_inventory_from_cache(self):
"""Reads the inventory from the cache file and returns it as a JSON object."""
cache = open(self.cache_path_cache, 'r')
json_inventory = cache.read()
return json_inventory
def load_index_from_cache(self):
"""Reads the index from the cache file and sets self.index."""
cache = open(self.cache_path_index, 'r')
json_index = cache.read()
self.index = json.loads(json_index)
def write_to_cache(self, data, filename):
"""Writes data in JSON format to a file."""
json_data = self.json_format_dict(data, True)
cache = open(filename, 'w')
cache.write(json_data)
cache.close()
def to_safe(self, word):
"""Escapes any characters that would be invalid in an ansible group name."""
return re.sub("[^A-Za-z0-9\-]", "_", word)
def json_format_dict(self, data, pretty=False):
"""Converts a dict to a JSON object and dumps it as a formatted string."""
if pretty:
return json.dumps(data, sort_keys=True, indent=2)
else:
return json.dumps(data)
AzureInventory()