457 lines
15 KiB
Python
Executable file
457 lines
15 KiB
Python
Executable file
#!/usr/bin/env python3
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#
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# Copyright 2015 Cisco Systems, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# original: https://github.com/CiscoCloud/terraform.py
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"""\
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Dynamic inventory for Terraform - finds all `.tfstate` files below the working
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directory and generates an inventory based on them.
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"""
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import argparse
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from collections import defaultdict
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import random
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from functools import wraps
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import json
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import os
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import re
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VERSION = '0.4.0pre'
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def tfstates(root=None):
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root = root or os.getcwd()
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for dirpath, _, filenames in os.walk(root):
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for name in filenames:
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if os.path.splitext(name)[-1] == '.tfstate':
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yield os.path.join(dirpath, name)
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def convert_to_v3_structure(attributes, prefix=''):
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""" Convert the attributes from v4 to v3
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Receives a dict and return a dictionary """
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result = {}
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if isinstance(attributes, str):
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# In the case when we receive a string (e.g. values for security_groups)
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return {'{}{}'.format(prefix, random.randint(1,10**10)): attributes}
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for key, value in attributes.items():
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if isinstance(value, list):
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if len(value):
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result['{}{}.#'.format(prefix, key, hash)] = len(value)
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for i, v in enumerate(value):
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result.update(convert_to_v3_structure(v, '{}{}.{}.'.format(prefix, key, i)))
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elif isinstance(value, dict):
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result['{}{}.%'.format(prefix, key)] = len(value)
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for k, v in value.items():
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result['{}{}.{}'.format(prefix, key, k)] = v
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else:
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result['{}{}'.format(prefix, key)] = value
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return result
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def iterresources(filenames):
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for filename in filenames:
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with open(filename, 'r') as json_file:
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state = json.load(json_file)
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tf_version = state['version']
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if tf_version == 3:
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for module in state['modules']:
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name = module['path'][-1]
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for key, resource in module['resources'].items():
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yield name, key, resource
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elif tf_version == 4:
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# In version 4 the structure changes so we need to iterate
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# each instance inside the resource branch.
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for resource in state['resources']:
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name = resource['provider'].split('.')[-1]
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for instance in resource['instances']:
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key = "{}.{}".format(resource['type'], resource['name'])
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if 'index_key' in instance:
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key = "{}.{}".format(key, instance['index_key'])
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data = {}
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data['type'] = resource['type']
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data['provider'] = resource['provider']
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data['depends_on'] = instance.get('depends_on', [])
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data['primary'] = {'attributes': convert_to_v3_structure(instance['attributes'])}
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if 'id' in instance['attributes']:
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data['primary']['id'] = instance['attributes']['id']
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data['primary']['meta'] = instance['attributes'].get('meta',{})
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yield name, key, data
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else:
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raise KeyError('tfstate version %d not supported' % tf_version)
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## READ RESOURCES
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PARSERS = {}
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def _clean_dc(dcname):
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# Consul DCs are strictly alphanumeric with underscores and hyphens -
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# ensure that the consul_dc attribute meets these requirements.
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return re.sub('[^\w_\-]', '-', dcname)
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def iterhosts(resources):
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'''yield host tuples of (name, attributes, groups)'''
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for module_name, key, resource in resources:
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resource_type, name = key.split('.', 1)
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try:
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parser = PARSERS[resource_type]
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except KeyError:
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continue
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yield parser(resource, module_name)
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def iterips(resources):
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'''yield ip tuples of (instance_id, ip)'''
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for module_name, key, resource in resources:
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resource_type, name = key.split('.', 1)
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if resource_type == 'openstack_compute_floatingip_associate_v2':
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yield openstack_floating_ips(resource)
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def parses(prefix):
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def inner(func):
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PARSERS[prefix] = func
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return func
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return inner
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def calculate_mantl_vars(func):
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"""calculate Mantl vars"""
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@wraps(func)
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def inner(*args, **kwargs):
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name, attrs, groups = func(*args, **kwargs)
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# attrs
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if attrs.get('role', '') == 'control':
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attrs['consul_is_server'] = True
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else:
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attrs['consul_is_server'] = False
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# groups
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if attrs.get('publicly_routable', False):
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groups.append('publicly_routable')
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return name, attrs, groups
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return inner
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def _parse_prefix(source, prefix, sep='.'):
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for compkey, value in list(source.items()):
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try:
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curprefix, rest = compkey.split(sep, 1)
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except ValueError:
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continue
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if curprefix != prefix or rest == '#':
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continue
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yield rest, value
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def parse_attr_list(source, prefix, sep='.'):
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attrs = defaultdict(dict)
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for compkey, value in _parse_prefix(source, prefix, sep):
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idx, key = compkey.split(sep, 1)
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attrs[idx][key] = value
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return list(attrs.values())
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def parse_dict(source, prefix, sep='.'):
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return dict(_parse_prefix(source, prefix, sep))
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def parse_list(source, prefix, sep='.'):
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return [value for _, value in _parse_prefix(source, prefix, sep)]
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def parse_bool(string_form):
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if type(string_form) is bool:
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return string_form
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token = string_form.lower()[0]
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if token == 't':
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return True
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elif token == 'f':
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return False
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else:
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raise ValueError('could not convert %r to a bool' % string_form)
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@parses('packet_device')
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def packet_device(resource, tfvars=None):
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raw_attrs = resource['primary']['attributes']
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name = raw_attrs['hostname']
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groups = []
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attrs = {
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'id': raw_attrs['id'],
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'facilities': parse_list(raw_attrs, 'facilities'),
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'hostname': raw_attrs['hostname'],
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'operating_system': raw_attrs['operating_system'],
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'locked': parse_bool(raw_attrs['locked']),
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'tags': parse_list(raw_attrs, 'tags'),
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'plan': raw_attrs['plan'],
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'project_id': raw_attrs['project_id'],
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'state': raw_attrs['state'],
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# ansible
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'ansible_ssh_host': raw_attrs['network.0.address'],
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'ansible_ssh_user': 'root', # Use root by default in packet
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# generic
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'ipv4_address': raw_attrs['network.0.address'],
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'public_ipv4': raw_attrs['network.0.address'],
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'ipv6_address': raw_attrs['network.1.address'],
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'public_ipv6': raw_attrs['network.1.address'],
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'private_ipv4': raw_attrs['network.2.address'],
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'provider': 'packet',
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}
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if raw_attrs['operating_system'] == 'coreos_stable':
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# For CoreOS set the ssh_user to core
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attrs.update({'ansible_ssh_user': 'core'})
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# add groups based on attrs
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groups.append('packet_operating_system=' + attrs['operating_system'])
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groups.append('packet_locked=%s' % attrs['locked'])
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groups.append('packet_state=' + attrs['state'])
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groups.append('packet_plan=' + attrs['plan'])
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# groups specific to kubespray
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groups = groups + attrs['tags']
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return name, attrs, groups
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def openstack_floating_ips(resource):
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raw_attrs = resource['primary']['attributes']
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attrs = {
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'ip': raw_attrs['floating_ip'],
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'instance_id': raw_attrs['instance_id'],
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}
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return attrs
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def openstack_floating_ips(resource):
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raw_attrs = resource['primary']['attributes']
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return raw_attrs['instance_id'], raw_attrs['floating_ip']
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@parses('openstack_compute_instance_v2')
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@calculate_mantl_vars
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def openstack_host(resource, module_name):
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raw_attrs = resource['primary']['attributes']
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name = raw_attrs['name']
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groups = []
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attrs = {
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'access_ip_v4': raw_attrs['access_ip_v4'],
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'access_ip_v6': raw_attrs['access_ip_v6'],
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'access_ip': raw_attrs['access_ip_v4'],
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'ip': raw_attrs['network.0.fixed_ip_v4'],
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'flavor': parse_dict(raw_attrs, 'flavor',
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sep='_'),
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'id': raw_attrs['id'],
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'image': parse_dict(raw_attrs, 'image',
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sep='_'),
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'key_pair': raw_attrs['key_pair'],
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'metadata': parse_dict(raw_attrs, 'metadata'),
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'network': parse_attr_list(raw_attrs, 'network'),
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'region': raw_attrs.get('region', ''),
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'security_groups': parse_list(raw_attrs, 'security_groups'),
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# ansible
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'ansible_ssh_port': 22,
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# workaround for an OpenStack bug where hosts have a different domain
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# after they're restarted
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'host_domain': 'novalocal',
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'use_host_domain': True,
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# generic
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'public_ipv4': raw_attrs['access_ip_v4'],
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'private_ipv4': raw_attrs['access_ip_v4'],
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'provider': 'openstack',
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}
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if 'floating_ip' in raw_attrs:
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attrs['private_ipv4'] = raw_attrs['network.0.fixed_ip_v4']
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try:
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if 'metadata.prefer_ipv6' in raw_attrs and raw_attrs['metadata.prefer_ipv6'] == "1":
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attrs.update({
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'ansible_ssh_host': re.sub("[\[\]]", "", raw_attrs['access_ip_v6']),
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'publicly_routable': True,
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})
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else:
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attrs.update({
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'ansible_ssh_host': raw_attrs['access_ip_v4'],
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'publicly_routable': True,
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})
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except (KeyError, ValueError):
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attrs.update({'ansible_ssh_host': '', 'publicly_routable': False})
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# Handling of floating IPs has changed: https://github.com/terraform-providers/terraform-provider-openstack/blob/master/CHANGELOG.md#010-june-21-2017
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# attrs specific to Ansible
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if 'metadata.ssh_user' in raw_attrs:
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attrs['ansible_ssh_user'] = raw_attrs['metadata.ssh_user']
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if 'volume.#' in list(raw_attrs.keys()) and int(raw_attrs['volume.#']) > 0:
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device_index = 1
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for key, value in list(raw_attrs.items()):
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match = re.search("^volume.*.device$", key)
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if match:
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attrs['disk_volume_device_'+str(device_index)] = value
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device_index += 1
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# attrs specific to Mantl
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attrs.update({
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'role': attrs['metadata'].get('role', 'none')
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})
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# add groups based on attrs
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groups.append('os_image=' + attrs['image']['name'])
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groups.append('os_flavor=' + attrs['flavor']['name'])
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groups.extend('os_metadata_%s=%s' % item
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for item in list(attrs['metadata'].items()))
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groups.append('os_region=' + attrs['region'])
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# groups specific to kubespray
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for group in attrs['metadata'].get('kubespray_groups', "").split(","):
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groups.append(group)
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return name, attrs, groups
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def iter_host_ips(hosts, ips):
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'''Update hosts that have an entry in the floating IP list'''
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for host in hosts:
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host_id = host[1]['id']
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if host_id in ips:
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ip = ips[host_id]
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host[1].update({
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'access_ip_v4': ip,
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'access_ip': ip,
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'public_ipv4': ip,
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'ansible_ssh_host': ip,
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})
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if 'use_access_ip' in host[1]['metadata'] and host[1]['metadata']['use_access_ip'] == "0":
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host[1].pop('access_ip')
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yield host
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## QUERY TYPES
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def query_host(hosts, target):
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for name, attrs, _ in hosts:
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if name == target:
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return attrs
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return {}
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def query_list(hosts):
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groups = defaultdict(dict)
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meta = {}
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for name, attrs, hostgroups in hosts:
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for group in set(hostgroups):
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# Ansible 2.6.2 stopped supporting empty group names: https://github.com/ansible/ansible/pull/42584/commits/d4cd474b42ed23d8f8aabb2a7f84699673852eaf
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# Empty group name defaults to "all" in Ansible < 2.6.2 so we alter empty group names to "all"
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if not group: group = "all"
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groups[group].setdefault('hosts', [])
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groups[group]['hosts'].append(name)
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meta[name] = attrs
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groups['_meta'] = {'hostvars': meta}
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return groups
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def query_hostfile(hosts):
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out = ['## begin hosts generated by terraform.py ##']
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out.extend(
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'{}\t{}'.format(attrs['ansible_ssh_host'].ljust(16), name)
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for name, attrs, _ in hosts
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)
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out.append('## end hosts generated by terraform.py ##')
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return '\n'.join(out)
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def main():
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parser = argparse.ArgumentParser(
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__file__, __doc__,
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formatter_class=argparse.ArgumentDefaultsHelpFormatter, )
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modes = parser.add_mutually_exclusive_group(required=True)
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modes.add_argument('--list',
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action='store_true',
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help='list all variables')
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modes.add_argument('--host', help='list variables for a single host')
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modes.add_argument('--version',
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action='store_true',
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help='print version and exit')
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modes.add_argument('--hostfile',
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action='store_true',
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help='print hosts as a /etc/hosts snippet')
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parser.add_argument('--pretty',
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action='store_true',
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help='pretty-print output JSON')
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parser.add_argument('--nometa',
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action='store_true',
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help='with --list, exclude hostvars')
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default_root = os.environ.get('TERRAFORM_STATE_ROOT',
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os.path.abspath(os.path.join(os.path.dirname(__file__),
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'..', '..', )))
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parser.add_argument('--root',
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default=default_root,
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help='custom root to search for `.tfstate`s in')
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args = parser.parse_args()
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if args.version:
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print('%s %s' % (__file__, VERSION))
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parser.exit()
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hosts = iterhosts(iterresources(tfstates(args.root)))
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# Perform a second pass on the file to pick up floating_ip entries to update the ip address of referenced hosts
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ips = dict(iterips(iterresources(tfstates(args.root))))
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if ips:
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hosts = iter_host_ips(hosts, ips)
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if args.list:
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output = query_list(hosts)
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if args.nometa:
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del output['_meta']
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print(json.dumps(output, indent=4 if args.pretty else None))
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elif args.host:
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output = query_host(hosts, args.host)
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print(json.dumps(output, indent=4 if args.pretty else None))
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elif args.hostfile:
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output = query_hostfile(hosts)
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print(output)
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parser.exit()
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if __name__ == '__main__':
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main()
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