#!/usr/bin/env python ''' DigitalOcean external inventory script ====================================== Generates Ansible inventory of DigitalOcean Droplets. In addition to the --list and --host options used by Ansible, there are options for generating JSON of other DigitalOcean data. This is useful when creating droplets. For example, --regions will return all the DigitalOcean Regions. This information can also be easily found in the cache file, whose default location is /tmp/ansible-digital_ocean.cache). The --pretty (-p) option pretty-prints the output for better human readability. ---- Configuration is read from `digital_ocean.ini`, then from environment variables, then and command-line arguments. Most notably, the DigitalOcean Client ID and API Key must be specified. They can be specified in the INI file or with the following environment variables: export DO_CLIENT_ID='DO123' DO_API_KEY='abc123' Alternatively, they can be passed on the command-line with --client-id and --api-key. If you specify DigitalOcean credentials in the INI file, a handy way to get them into your environment (e.g., to use the digital_ocean module) is to use the output of the --env option with export: export $(digital_ocean.py --env) ---- The following groups are generated from --list: - ID (droplet ID) - NAME (droplet NAME) - image_ID - image_NAME - distro_NAME (distribution NAME from image) - region_ID - region_NAME - size_ID - size_NAME - status_STATUS When run against a specific host, this script returns the following variables: - do_created_at - do_distroy - do_id - do_image - do_image_id - do_ip_address - do_name - do_region - do_region_id - do_size - do_size_id - do_status ----- ``` usage: digital_ocean.py [-h] [--list] [--host HOST] [--all] [--droplets] [--regions] [--images] [--sizes] [--ssh-keys] [--domains] [--pretty] [--cache-path CACHE_PATH] [--cache-max_age CACHE_MAX_AGE] [--refresh-cache] [--client-id CLIENT_ID] [--api-key API_KEY] Produce an Ansible Inventory file based on DigitalOcean credentials optional arguments: -h, --help show this help message and exit --list List all active Droplets as Ansible inventory (default: True) --host HOST Get all Ansible inventory variables about a specific Droplet --all List all DigitalOcean information as JSON --droplets List Droplets as JSON --regions List Regions as JSON --images List Images as JSON --sizes List Sizes as JSON --ssh-keys List SSH keys as JSON --domains List Domains as JSON --pretty, -p Pretty-print results --cache-path CACHE_PATH Path to the cache files (default: .) --cache-max_age CACHE_MAX_AGE Maximum age of the cached items (default: 0) --refresh-cache Force refresh of cache by making API requests to DigitalOcean (default: False - use cache files) --client-id CLIENT_ID, -c CLIENT_ID DigitalOcean Client ID --api-key API_KEY, -a API_KEY DigitalOcean API Key ``` ''' # (c) 2013, Evan Wies # # Inspired by the EC2 inventory plugin: # https://github.com/ansible/ansible/blob/devel/plugins/inventory/ec2.py # # 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 . ###################################################################### import os import sys import re import argparse from time import time import ConfigParser try: import json except ImportError: import simplejson as json try: from dopy.manager import DoError, DoManager except ImportError as e: print "failed=True msg='`dopy` library required for this script'" sys.exit(1) class DigitalOceanInventory(object): ########################################################################### # Main execution path ########################################################################### def __init__(self): ''' Main execution path ''' # DigitalOceanInventory data self.data = {} # All DigitalOcean data self.inventory = {} # Ansible Inventory self.index = {} # Varous indices of Droplet metadata # Define defaults self.cache_path = '.' self.cache_max_age = 0 # Read settings, environment variables, and CLI arguments self.read_settings() self.read_environment() self.read_cli_args() # Verify credentials were set if not hasattr(self, 'client_id') or not hasattr(self, 'api_key'): print '''Could not find values for DigitalOcean client_id and api_key. They must be specified via either ini file, command line argument (--client-id and --api-key), or environment variables (DO_CLIENT_ID and DO_API_KEY)''' sys.exit(-1) # env command, show DigitalOcean credentials if self.args.env: print "DO_CLIENT_ID=%s DO_API_KEY=%s" % (self.client_id, self.api_key) sys.exit(0) # Manage cache self.cache_filename = self.cache_path + "/ansible-digital_ocean.cache" self.cache_refreshed = False if self.args.refresh_cache or not self.is_cache_valid(): self.load_all_data_from_digital_ocean() else: self.load_from_cache() if len(self.data) == 0: self.load_all_data_from_digital_ocean() # Pick the json_data to print based on the CLI command if self.args.droplets: json_data = { 'droplets': self.data['droplets'] } elif self.args.regions: json_data = { 'regions': self.data['regions'] } elif self.args.images: json_data = { 'images': self.data['images'] } elif self.args.sizes: json_data = { 'sizes': self.data['sizes'] } elif self.args.ssh_keys: json_data = { 'ssh_keys': self.data['ssh_keys'] } elif self.args.domains: json_data = { 'domains': self.data['domains'] } elif self.args.all: json_data = self.data elif self.args.host: json_data = self.load_droplet_variables_for_host() else: # '--list' this is last to make it default json_data = self.inventory if self.args.pretty: print json.dumps( json_data, sort_keys=True, indent=2 ) else: print json.dumps( json_data ) # That's all she wrote... ########################################################################### # Script configuration ########################################################################### def read_settings(self): ''' Reads the settings from the digital_ocean.ini file ''' config = ConfigParser.SafeConfigParser() config.read(os.path.dirname(os.path.realpath(__file__)) + '/digital_ocean.ini') # Credentials if config.has_option('digital_ocean', 'client_id'): self.client_id = config.get('digital_ocean', 'client_id') if config.has_option('digital_ocean', 'api_key'): self.api_key = config.get('digital_ocean', 'api_key') # Cache related if config.has_option('digital_ocean', 'cache_path'): self.cache_path = config.get('digital_ocean', 'cache_path') if config.has_option('digital_ocean', 'cache_max_age'): self.cache_max_age = config.getint('digital_ocean', 'cache_max_age') def read_environment(self): ''' Reads the settings from environment variables ''' # Setup credentials if os.getenv("DO_CLIENT_ID"): self.client_id = os.getenv("DO_CLIENT_ID") if os.getenv("DO_API_KEY"): self.api_key = os.getenv("DO_API_KEY") def read_cli_args(self): ''' Command line argument processing ''' parser = argparse.ArgumentParser(description='Produce an Ansible Inventory file based on DigitalOcean credentials') parser.add_argument('--list', action='store_true', help='List all active Droplets as Ansible inventory (default: True)') parser.add_argument('--host', action='store', help='Get all Ansible inventory variables about a specific Droplet') parser.add_argument('--all', action='store_true', help='List all DigitalOcean information as JSON') parser.add_argument('--droplets', action='store_true', help='List Droplets as JSON') parser.add_argument('--regions', action='store_true', help='List Regions as JSON') parser.add_argument('--images', action='store_true', help='List Images as JSON') parser.add_argument('--sizes', action='store_true', help='List Sizes as JSON') parser.add_argument('--ssh-keys', action='store_true', help='List SSH keys as JSON') parser.add_argument('--domains', action='store_true',help='List Domains as JSON') parser.add_argument('--pretty','-p', action='store_true', help='Pretty-print results') parser.add_argument('--cache-path', action='store', help='Path to the cache files (default: .)') parser.add_argument('--cache-max_age', action='store', help='Maximum age of the cached items (default: 0)') parser.add_argument('--refresh-cache', action='store_true', default=False, help='Force refresh of cache by making API requests to DigitalOcean (default: False - use cache files)') parser.add_argument('--env','-e', action='store_true', help='Display DO_CLIENT_ID and DO_API_KEY') parser.add_argument('--client-id','-c', action='store', help='DigitalOcean Client ID') parser.add_argument('--api-key','-a', action='store', help='DigitalOcean API Key') self.args = parser.parse_args() if self.args.client_id: self.client_id = self.args.client_id if self.args.api_key: self.api_key = self.args.api_key if self.args.cache_path: self.cache_path = self.args.cache_path if self.args.cache_max_age: self.cache_max_age = self.args.cache_max_age ########################################################################### # Data Management ########################################################################### def load_all_data_from_digital_ocean(self): ''' Use dopy to get all the information from DigitalOcean and save data in cache files ''' manager = DoManager( self.client_id, self.api_key ) self.data = {} self.data['droplets'] = self.sanitize_list( manager.all_active_droplets() ) self.data['regions'] = self.sanitize_list( manager.all_regions() ) self.data['images'] = self.sanitize_list( manager.all_images() ) self.data['sizes'] = self.sanitize_list( manager.sizes() ) self.data['ssh_keys'] = self.sanitize_list( manager.all_ssh_keys() ) self.data['domains'] = self.sanitize_list( manager.all_domains() ) self.index = {} self.index['region_to_name'] = self.build_index( self.data['regions'], 'id', 'name' ) self.index['size_to_name'] = self.build_index( self.data['sizes'], 'id', 'name' ) self.index['image_to_name'] = self.build_index( self.data['images'], 'id', 'name' ) self.index['image_to_distro'] = self.build_index( self.data['images'], 'id', 'distribution' ) self.index['host_to_droplet'] = self.build_index( self.data['droplets'], 'ip_address', 'id', False ) self.build_inventory() self.write_to_cache() def build_index(self, source_seq, key_from, key_to, use_slug=True): dest_dict = {} for item in source_seq: name = (use_slug and item.has_key('slug')) and item['slug'] or item[key_to] dest_dict[item[key_from]] = name return dest_dict def build_inventory(self): '''Build Ansible inventory of droplets''' self.inventory = {} # add all droplets by id and name for droplet in self.data['droplets']: dest = droplet['ip_address'] self.inventory[droplet['id']] = [dest] self.push( self.inventory, droplet['name'], dest ) self.push( self.inventory, 'region_'+droplet['region_id'], dest ) self.push( self.inventory, 'image_' +droplet['image_id'], dest ) self.push( self.inventory, 'size_' +droplet['size_id'], dest ) self.push( self.inventory, 'status_'+droplet['status'], dest ) region_name = self.index['region_to_name'][droplet['region_id']] self.push( self.inventory, 'region_'+region_name, dest ) size_name = self.index['size_to_name'][droplet['size_id']] self.push( self.inventory, 'size_'+size_name, dest ) image_name = self.index['image_to_name'][droplet['image_id']] self.push( self.inventory, 'image_'+image_name, dest ) distro_name = self.index['image_to_distro'][droplet['image_id']] self.push( self.inventory, 'distro_'+distro_name, dest ) def load_droplet_variables_for_host(self): '''Generate a JSON reponse to a --host call''' host = self.to_safe(str(self.args.host)) if not host in self.index['host_to_droplet']: # try updating cache self.load_all_data_from_digital_ocean() if not host in self.index['host_to_droplet']: # host might not exist anymore return {} droplet = None if self.cache_refreshed: for drop in self.data['droplets']: if drop['ip_address'] == host: droplet = drop break else: # Cache wasn't refreshed this run, so hit DigitalOcean API manager = DoManager( self.client_id, self.api_key ) droplet_id = self.index['host_to_droplet'][host] droplet = self.sanitize_dict( manager.show_droplet( droplet_id ) ) if not droplet: return {} # Put all the information in a 'do_' namespace info = {} for k, v in droplet.items(): info['do_'+k] = v # Generate user-friendly variables (i.e. not the ID's) if droplet.has_key('region_id'): info['do_region'] = self.index['region_to_name'][droplet['region_id']] if droplet.has_key('size_id'): info['do_size'] = self.index['size_to_name'][droplet['size_id']] if droplet.has_key('image_id'): info['do_image'] = self.index['image_to_name'][droplet['image_id']] info['do_distro'] = self.index['image_to_distro'][droplet['image_id']] return info ########################################################################### # Cache Management ########################################################################### def is_cache_valid(self): ''' Determines if the cache files have expired, or if it is still valid ''' if os.path.isfile(self.cache_filename): mod_time = os.path.getmtime(self.cache_filename) current_time = time() if (mod_time + self.cache_max_age) > current_time: return True return False def load_from_cache(self): ''' Reads the data from the cache file and assigns it to member variables as Python Objects''' cache = open(self.cache_filename, 'r') json_data = cache.read() cache.close() data = json.loads( json_data ) self.data = data['data'] self.inventory = data['inventory'] self.index = data['index'] def write_to_cache(self): ''' Writes data in JSON format to a file ''' data = { 'data': self.data, 'index': self.index, 'inventory': self.inventory } json_data = json.dumps( data, sort_keys=True, indent=2 ) cache = open(self.cache_filename, 'w') cache.write(json_data) cache.close() ########################################################################### # Utilities ########################################################################### 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 to_safe(self, word): ''' Converts 'bad' characters in a string to underscores so they can be used as Ansible groups ''' return re.sub("[^A-Za-z0-9\-\.]", "_", word) def sanitize_dict(self, d): new_dict = {} for k, v in d.items(): if v != None: new_dict[self.to_safe(str(k))] = self.to_safe(str(v)) return new_dict def sanitize_list(self, seq): new_seq = [] for d in seq: new_seq.append( self.sanitize_dict(d) ) return new_seq ########################################################################### # Run the script DigitalOceanInventory()