499 lines
18 KiB
Python
Executable file
499 lines
18 KiB
Python
Executable file
#!/usr/bin/env python
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'''
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Packet.net 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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Packet.net using the Packet library.
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NOTE: This script assumes Ansible is being executed where the environment
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variable needed for Packet API Token already been set:
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export PACKET_API_TOKEN=Bfse9F24SFtfs423Gsd3ifGsd43sSdfs
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This script also assumes there is a packet_net.ini file alongside it. To specify a
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different path to packet_net.ini, define the PACKET_NET_INI_PATH environment variable:
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export PACKET_NET_INI_PATH=/path/to/my_packet_net.ini
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'''
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# (c) 2016, Peter Sankauskas
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# (c) 2017, Tomas Karasek
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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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import sys
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import os
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import argparse
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import re
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from time import time
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import six
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from six.moves import configparser
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try:
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import packet
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except ImportError as e:
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sys.exit("failed=True msg='`packet-python` library required for this script'")
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import traceback
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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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ini_section = 'packet'
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class PacketInventory(object):
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def _empty_inventory(self):
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return {"_meta": {"hostvars": {}}}
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def __init__(self):
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''' Main execution path '''
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# Inventory grouped by device IDs, tags, security groups, regions,
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# and availability zones
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self.inventory = self._empty_inventory()
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# Index of hostname (address) to device ID
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self.index = {}
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# Read settings and parse CLI arguments
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self.parse_cli_args()
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self.read_settings()
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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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# Data to print
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if self.args.host:
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data_to_print = self.get_host_info()
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elif self.args.list:
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# Display list of devices for inventory
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if self.inventory == self._empty_inventory():
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data_to_print = self.get_inventory_from_cache()
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else:
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data_to_print = self.json_format_dict(self.inventory, True)
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print(data_to_print)
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def is_cache_valid(self):
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''' Determines if the cache files have 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 packet_net.ini file '''
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if six.PY3:
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config = configparser.ConfigParser()
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else:
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config = configparser.SafeConfigParser()
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_ini_path_raw = os.environ.get('PACKET_NET_INI_PATH')
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if _ini_path_raw:
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packet_ini_path = os.path.expanduser(os.path.expandvars(_ini_path_raw))
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else:
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packet_ini_path = os.path.join(os.path.dirname(os.path.realpath(__file__)), 'packet_net.ini')
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config.read(packet_ini_path)
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# items per page
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self.items_per_page = 999
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if config.has_option(ini_section, 'items_per_page'):
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config.get(ini_section, 'items_per_page')
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# Instance states to be gathered in inventory. Default is all of them.
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packet_valid_device_states = [
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'active',
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'inactive',
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'queued',
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'provisioning'
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]
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self.packet_device_states = []
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if config.has_option(ini_section, 'device_states'):
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for device_state in config.get(ini_section, 'device_states').split(','):
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device_state = device_state.strip()
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if device_state not in packet_valid_device_states:
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continue
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self.packet_device_states.append(device_state)
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else:
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self.packet_device_states = packet_valid_device_states
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# Cache related
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cache_dir = os.path.expanduser(config.get(ini_section, 'cache_path'))
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if not os.path.exists(cache_dir):
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os.makedirs(cache_dir)
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self.cache_path_cache = cache_dir + "/ansible-packet.cache"
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self.cache_path_index = cache_dir + "/ansible-packet.index"
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self.cache_max_age = config.getint(ini_section, 'cache_max_age')
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# Configure nested groups instead of flat namespace.
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if config.has_option(ini_section, 'nested_groups'):
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self.nested_groups = config.getboolean(ini_section, 'nested_groups')
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else:
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self.nested_groups = False
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# Replace dash or not in group names
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if config.has_option(ini_section, 'replace_dash_in_groups'):
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self.replace_dash_in_groups = config.getboolean(ini_section, 'replace_dash_in_groups')
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else:
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self.replace_dash_in_groups = True
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# Configure which groups should be created.
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group_by_options = [
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'group_by_device_id',
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'group_by_hostname',
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'group_by_facility',
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'group_by_project',
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'group_by_operating_system',
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'group_by_plan_type',
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'group_by_tags',
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'group_by_tag_none',
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]
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for option in group_by_options:
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if config.has_option(ini_section, option):
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setattr(self, option, config.getboolean(ini_section, option))
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else:
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setattr(self, option, True)
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# Do we need to just include hosts that match a pattern?
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try:
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pattern_include = config.get(ini_section, 'pattern_include')
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if pattern_include and len(pattern_include) > 0:
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self.pattern_include = re.compile(pattern_include)
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else:
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self.pattern_include = None
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except configparser.NoOptionError:
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self.pattern_include = None
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# Do we need to exclude hosts that match a pattern?
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try:
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pattern_exclude = config.get(ini_section, 'pattern_exclude')
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if pattern_exclude and len(pattern_exclude) > 0:
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self.pattern_exclude = re.compile(pattern_exclude)
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else:
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self.pattern_exclude = None
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except configparser.NoOptionError:
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self.pattern_exclude = None
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# Projects
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self.projects = []
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configProjects = config.get(ini_section, 'projects')
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configProjects_exclude = config.get(ini_section, 'projects_exclude')
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if (configProjects == 'all'):
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for projectInfo in self.get_projects():
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if projectInfo.name not in configProjects_exclude:
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self.projects.append(projectInfo.name)
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else:
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self.projects = configProjects.split(",")
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def parse_cli_args(self):
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''' Command line argument processing '''
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parser = argparse.ArgumentParser(description='Produce an Ansible Inventory file based on Packet')
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parser.add_argument('--list', action='store_true', default=True,
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help='List Devices (default: True)')
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parser.add_argument('--host', action='store',
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help='Get all the variables about a specific device')
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parser.add_argument('--refresh-cache', action='store_true', default=False,
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help='Force refresh of cache by making API requests to Packet (default: False - use cache files)')
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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 to each region, and save data in cache files '''
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for projectInfo in self.get_projects():
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if projectInfo.name in self.projects:
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self.get_devices_by_project(projectInfo)
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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 connect(self):
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''' create connection to api server'''
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token = os.environ.get('PACKET_API_TOKEN')
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if token is None:
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raise Exception("Error reading token from environment (PACKET_API_TOKEN)!")
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manager = packet.Manager(auth_token=token)
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return manager
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def get_projects(self):
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'''Makes a Packet API call to get the list of projects'''
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try:
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manager = self.connect()
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projects = manager.list_projects()
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return projects
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except Exception as e:
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traceback.print_exc()
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self.fail_with_error(e, 'getting Packet projects')
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def get_devices_by_project(self, project):
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''' Makes an Packet API call to the list of devices in a particular
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project '''
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params = {
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'per_page': self.items_per_page
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}
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try:
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manager = self.connect()
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devices = manager.list_devices(project_id=project.id, params=params)
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for device in devices:
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self.add_device(device, project)
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except Exception as e:
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traceback.print_exc()
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self.fail_with_error(e, 'getting Packet devices')
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def fail_with_error(self, err_msg, err_operation=None):
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'''log an error to std err for ansible-playbook to consume and exit'''
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if err_operation:
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err_msg = 'ERROR: "{err_msg}", while: {err_operation}\n'.format(
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err_msg=err_msg, err_operation=err_operation)
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sys.stderr.write(err_msg)
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sys.exit(1)
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def get_device(self, device_id):
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manager = self.connect()
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device = manager.get_device(device_id)
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return device
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def add_device(self, device, project):
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''' Adds a device to the inventory and index, as long as it is
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addressable '''
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# Only return devices with desired device states
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if device.state not in self.packet_device_states:
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return
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# Select the best destination address
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dest = None
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for ip_address in device.ip_addresses:
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if ip_address['public'] is True and ip_address['address_family'] == 4:
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dest = ip_address['address']
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if not dest:
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# Skip devices we cannot address (e.g. private VPC subnet)
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return
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# if we only want to include hosts that match a pattern, skip those that don't
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if self.pattern_include and not self.pattern_include.match(device.hostname):
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return
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# if we need to exclude hosts that match a pattern, skip those
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if self.pattern_exclude and self.pattern_exclude.match(device.hostname):
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return
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# Add to index
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self.index[dest] = [project.id, device.id]
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# Inventory: Group by device ID (always a group of 1)
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if self.group_by_device_id:
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self.inventory[device.id] = [dest]
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if self.nested_groups:
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self.push_group(self.inventory, 'devices', device.id)
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# Inventory: Group by device name (hopefully a group of 1)
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if self.group_by_hostname:
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self.push(self.inventory, device.hostname, dest)
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if self.nested_groups:
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self.push_group(self.inventory, 'hostnames', project.name)
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# Inventory: Group by project
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if self.group_by_project:
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self.push(self.inventory, project.name, dest)
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if self.nested_groups:
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self.push_group(self.inventory, 'projects', project.name)
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# Inventory: Group by facility
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if self.group_by_facility:
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self.push(self.inventory, device.facility['code'], dest)
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if self.nested_groups:
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if self.group_by_facility:
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self.push_group(self.inventory, project.name, device.facility['code'])
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# Inventory: Group by OS
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if self.group_by_operating_system:
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self.push(self.inventory, device.operating_system.slug, dest)
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if self.nested_groups:
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self.push_group(self.inventory, 'operating_systems', device.operating_system.slug)
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# Inventory: Group by plan type
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if self.group_by_plan_type:
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self.push(self.inventory, device.plan['slug'], dest)
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if self.nested_groups:
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self.push_group(self.inventory, 'plans', device.plan['slug'])
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# Inventory: Group by tag keys
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if self.group_by_tags:
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for k in device.tags:
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key = self.to_safe("tag_" + k)
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self.push(self.inventory, key, dest)
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if self.nested_groups:
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self.push_group(self.inventory, 'tags', self.to_safe("tag_" + k))
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# Global Tag: devices without tags
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if self.group_by_tag_none and len(device.tags) == 0:
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self.push(self.inventory, 'tag_none', dest)
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if self.nested_groups:
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self.push_group(self.inventory, 'tags', 'tag_none')
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# Global Tag: tag all Packet devices
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self.push(self.inventory, 'packet', dest)
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self.inventory["_meta"]["hostvars"][dest] = self.get_host_info_dict_from_device(device)
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def get_host_info_dict_from_device(self, device):
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device_vars = {}
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for key in vars(device):
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value = getattr(device, key)
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key = self.to_safe('packet_' + key)
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# Handle complex types
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if key == 'packet_state':
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device_vars[key] = device.state or ''
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elif key == 'packet_hostname':
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device_vars[key] = value
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elif isinstance(value, (int, bool)):
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device_vars[key] = value
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elif isinstance(value, six.string_types):
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device_vars[key] = value.strip()
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elif value is None:
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device_vars[key] = ''
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elif key == 'packet_facility':
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device_vars[key] = value['code']
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elif key == 'packet_operating_system':
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device_vars[key] = value.slug
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elif key == 'packet_plan':
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device_vars[key] = value['slug']
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elif key == 'packet_tags':
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for k in value:
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key = self.to_safe('packet_tag_' + k)
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device_vars[key] = k
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else:
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pass
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# print key
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# print type(value)
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# print value
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return device_vars
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def get_host_info(self):
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''' Get variables about a specific host '''
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if len(self.index) == 0:
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# Need to load index from cache
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self.load_index_from_cache()
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if self.args.host not in self.index:
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# try updating the cache
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self.do_api_calls_update_cache()
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if self.args.host not in self.index:
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# host might not exist anymore
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return self.json_format_dict({}, True)
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(project_id, device_id) = self.index[self.args.host]
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device = self.get_device(device_id)
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return self.json_format_dict(self.get_host_info_dict_from_device(device), True)
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def push(self, my_dict, key, element):
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''' Push an element onto an array that may not have been defined in
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the dict '''
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group_info = my_dict.setdefault(key, [])
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if isinstance(group_info, dict):
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host_list = group_info.setdefault('hosts', [])
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host_list.append(element)
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else:
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group_info.append(element)
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def push_group(self, my_dict, key, element):
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''' Push a group as a child of another group. '''
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parent_group = my_dict.setdefault(key, {})
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if not isinstance(parent_group, dict):
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parent_group = my_dict[key] = {'hosts': parent_group}
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child_groups = parent_group.setdefault('children', [])
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if element not in child_groups:
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child_groups.append(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
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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 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 uncammelize(self, key):
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temp = re.sub('(.)([A-Z][a-z]+)', r'\1_\2', key)
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return re.sub('([a-z0-9])([A-Z])', r'\1_\2', temp).lower()
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def to_safe(self, word):
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''' Converts 'bad' characters in a string to underscores so they can be used as Ansible groups '''
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regex = "[^A-Za-z0-9\_"
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if not self.replace_dash_in_groups:
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regex += "\-"
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return re.sub(regex + "]", "_", 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
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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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# Run the script
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PacketInventory()
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