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