255 lines
9.2 KiB
Python
Executable file
255 lines
9.2 KiB
Python
Executable file
#!/usr/bin/env python
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# Copyright (c) 2012, Marco Vito Moscaritolo <marco@agavee.com>
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# Copyright (c) 2013, Jesse Keating <jesse.keating@rackspace.com>
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# Copyright (c) 2015, Hewlett-Packard Development Company, L.P.
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# Copyright (c) 2016, Rackspace Australia
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#
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# This module 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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# This software 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 this software. If not, see <http://www.gnu.org/licenses/>.
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# The OpenStack Inventory module uses os-client-config for configuration.
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# https://github.com/openstack/os-client-config
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# This means it will either:
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# - Respect normal OS_* environment variables like other OpenStack tools
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# - Read values from a clouds.yaml file.
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# If you want to configure via clouds.yaml, you can put the file in:
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# - Current directory
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# - ~/.config/openstack/clouds.yaml
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# - /etc/openstack/clouds.yaml
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# - /etc/ansible/openstack.yml
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# The clouds.yaml file can contain entries for multiple clouds and multiple
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# regions of those clouds. If it does, this inventory module will by default
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# connect to all of them and present them as one contiguous inventory. You
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# can limit to one cloud by passing the `--cloud` parameter, or use the
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# OS_CLOUD environment variable. If caching is enabled, and a cloud is
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# selected, then per-cloud cache folders will be used.
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#
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# See the adjacent openstack.yml file for an example config file
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# There are two ansible inventory specific options that can be set in
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# the inventory section.
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# expand_hostvars controls whether or not the inventory will make extra API
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# calls to fill out additional information about each server
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# use_hostnames changes the behavior from registering every host with its UUID
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# and making a group of its hostname to only doing this if the
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# hostname in question has more than one server
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# fail_on_errors causes the inventory to fail and return no hosts if one cloud
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# has failed (for example, bad credentials or being offline).
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# When set to False, the inventory will return hosts from
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# whichever other clouds it can contact. (Default: True)
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import argparse
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import collections
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import os
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import sys
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import time
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from distutils.version import StrictVersion
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try:
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import json
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except:
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import simplejson as json
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import os_client_config
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import shade
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import shade.inventory
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CONFIG_FILES = ['/etc/ansible/openstack.yaml', '/etc/ansible/openstack.yml']
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def get_groups_from_server(server_vars, namegroup=True):
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groups = []
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region = server_vars['region']
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cloud = server_vars['cloud']
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metadata = server_vars.get('metadata', {})
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# Create a group for the cloud
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groups.append(cloud)
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# Create a group on region
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groups.append(region)
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# And one by cloud_region
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groups.append("%s_%s" % (cloud, region))
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# Check if group metadata key in servers' metadata
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if 'group' in metadata:
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groups.append(metadata['group'])
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for extra_group in metadata.get('groups', '').split(','):
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if extra_group:
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groups.append(extra_group.strip())
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groups.append('instance-%s' % server_vars['id'])
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if namegroup:
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groups.append(server_vars['name'])
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for key in ('flavor', 'image'):
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if 'name' in server_vars[key]:
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groups.append('%s-%s' % (key, server_vars[key]['name']))
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for key, value in iter(metadata.items()):
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groups.append('meta-%s_%s' % (key, value))
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az = server_vars.get('az', None)
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if az:
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# Make groups for az, region_az and cloud_region_az
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groups.append(az)
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groups.append('%s_%s' % (region, az))
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groups.append('%s_%s_%s' % (cloud, region, az))
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return groups
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def get_host_groups(inventory, refresh=False, cloud=None):
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(cache_file, cache_expiration_time) = get_cache_settings(cloud)
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if is_cache_stale(cache_file, cache_expiration_time, refresh=refresh):
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groups = to_json(get_host_groups_from_cloud(inventory))
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open(cache_file, 'w').write(groups)
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else:
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groups = open(cache_file, 'r').read()
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return groups
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def append_hostvars(hostvars, groups, key, server, namegroup=False):
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hostvars[key] = dict(
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ansible_ssh_host=server['interface_ip'],
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ansible_host=server['interface_ip'],
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openstack=server)
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for group in get_groups_from_server(server, namegroup=namegroup):
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groups[group].append(key)
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def get_host_groups_from_cloud(inventory):
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groups = collections.defaultdict(list)
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firstpass = collections.defaultdict(list)
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hostvars = {}
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list_args = {}
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if hasattr(inventory, 'extra_config'):
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use_hostnames = inventory.extra_config['use_hostnames']
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list_args['expand'] = inventory.extra_config['expand_hostvars']
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if StrictVersion(shade.__version__) >= StrictVersion("1.6.0"):
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list_args['fail_on_cloud_config'] = \
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inventory.extra_config['fail_on_errors']
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else:
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use_hostnames = False
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for server in inventory.list_hosts(**list_args):
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if 'interface_ip' not in server:
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continue
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firstpass[server['name']].append(server)
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for name, servers in firstpass.items():
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if len(servers) == 1 and use_hostnames:
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append_hostvars(hostvars, groups, name, servers[0])
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else:
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server_ids = set()
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# Trap for duplicate results
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for server in servers:
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server_ids.add(server['id'])
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if len(server_ids) == 1 and use_hostnames:
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append_hostvars(hostvars, groups, name, servers[0])
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else:
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for server in servers:
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append_hostvars(
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hostvars, groups, server['id'], server,
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namegroup=True)
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groups['_meta'] = {'hostvars': hostvars}
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return groups
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def is_cache_stale(cache_file, cache_expiration_time, refresh=False):
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''' Determines if cache file has expired, or if it is still valid '''
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if refresh:
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return True
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if os.path.isfile(cache_file) and os.path.getsize(cache_file) > 0:
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mod_time = os.path.getmtime(cache_file)
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current_time = time.time()
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if (mod_time + cache_expiration_time) > current_time:
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return False
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return True
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def get_cache_settings(cloud=None):
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config = os_client_config.config.OpenStackConfig(
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config_files=os_client_config.config.CONFIG_FILES + CONFIG_FILES)
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# For inventory-wide caching
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cache_expiration_time = config.get_cache_expiration_time()
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cache_path = config.get_cache_path()
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if cloud:
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cache_path = '{0}_{1}'.format(cache_path, cloud)
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if not os.path.exists(cache_path):
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os.makedirs(cache_path)
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cache_file = os.path.join(cache_path, 'ansible-inventory.cache')
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return (cache_file, cache_expiration_time)
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def to_json(in_dict):
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return json.dumps(in_dict, sort_keys=True, indent=2)
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def parse_args():
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parser = argparse.ArgumentParser(description='OpenStack Inventory Module')
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parser.add_argument('--cloud', default=os.environ.get('OS_CLOUD'),
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help='Cloud name (default: None')
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parser.add_argument('--private',
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action='store_true',
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help='Use private address for ansible host')
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parser.add_argument('--refresh', action='store_true',
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help='Refresh cached information')
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parser.add_argument('--debug', action='store_true', default=False,
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help='Enable debug output')
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group = parser.add_mutually_exclusive_group(required=True)
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group.add_argument('--list', action='store_true',
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help='List active servers')
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group.add_argument('--host', help='List details about the specific host')
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return parser.parse_args()
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def main():
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args = parse_args()
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try:
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config_files = os_client_config.config.CONFIG_FILES + CONFIG_FILES
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shade.simple_logging(debug=args.debug)
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inventory_args = dict(
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refresh=args.refresh,
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config_files=config_files,
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private=args.private,
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cloud=args.cloud,
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)
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if hasattr(shade.inventory.OpenStackInventory, 'extra_config'):
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inventory_args.update(dict(
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config_key='ansible',
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config_defaults={
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'use_hostnames': False,
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'expand_hostvars': True,
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'fail_on_errors': True,
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}
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))
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inventory = shade.inventory.OpenStackInventory(**inventory_args)
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if args.list:
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output = get_host_groups(inventory, refresh=args.refresh, cloud=args.cloud)
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elif args.host:
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output = to_json(inventory.get_host(args.host))
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print(output)
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except shade.OpenStackCloudException as e:
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sys.stderr.write('%s\n' % e.message)
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sys.exit(1)
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sys.exit(0)
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if __name__ == '__main__':
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main()
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