1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
#!/usr/bin/env python
# -*- coding: utf-8 -*-
'''
External inventory script for Scaleway
====================================
Shamelessly copied from an existing inventory script.
This script generates an inventory that Ansible can understand by making API requests to Scaleway API
Requires some python libraries, ensure to have them installed when using this script. (pip install requests https://pypi.python.org/pypi/requests)
Before using this script you may want to modify scaleway.ini config file.
This script generates an Ansible hosts file with these host groups:
<hostname>: Defines host itself with Scaleway's hostname as group name.
<tag>: Contains all hosts which has "<tag>" as tag.
<region>: Contains all hosts which are in the "<region>" region.
all: Contains all hosts defined in Scaleway.
'''
# (c) 2017, Paul B. <paul@bonaud.fr>
#
# 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 <http://www.gnu.org/licenses/>.
import copy
import os
import requests
import six
from six.moves import configparser
import sys
import time
import traceback
try:
import json
except ImportError:
import simplejson as json
EMPTY_GROUP = {
'children': [],
'hosts': []
}
class ScalewayAPI:
REGIONS = ['par1', 'ams1']
def __init__(self, auth_token, region):
self.session = requests.session()
self.session.headers.update({
'User-Agent': 'Ansible Python/%s' % (sys.version.split(' ')[0])
})
self.session.headers.update({
'X-Auth-Token': auth_token.encode('latin1')
})
self.base_url = 'https://cp-%s.scaleway.com' % (region)
def servers(self):
raw = self.session.get('/'.join([self.base_url, 'servers']))
try:
response = raw.json()
return self.get_resource('servers', response, raw)
except ValueError:
return []
def get_resource(self, resource, response, raw):
raw.raise_for_status()
if resource in response:
return response[resource]
else:
raise ValueError(
"Resource %s not found in Scaleway API response" % (resource))
def env_or_param(env_key, param=None, fallback=None):
env_value = os.environ.get(env_key)
if (param, env_value) == (None, None):
return fallback
elif env_value is not None:
return env_value
else:
return param
def save_cache(data, config):
''' saves item to cache '''
dpath = config.get('cache', 'cache_dir')
try:
cache = open('/'.join([dpath, 'scaleway_ansible_inventory.json']), 'w')
cache.write(json.dumps(data))
cache.close()
except IOError as e:
pass # not really sure what to do here
def get_cache(cache_item, config):
''' returns cached item '''
dpath = config.get('cache', 'cache_dir')
inv = {}
try:
cache = open('/'.join([dpath, 'scaleway_ansible_inventory.json']), 'r')
inv = cache.read()
cache.close()
except IOError as e:
pass # not really sure what to do here
return inv
def cache_available(config):
''' checks if we have a 'fresh' cache available for item requested '''
if config.has_option('cache', 'cache_dir'):
dpath = config.get('cache', 'cache_dir')
try:
existing = os.stat(
'/'.join([dpath, 'scaleway_ansible_inventory.json']))
except OSError:
return False
if config.has_option('cache', 'cache_max_age'):
maxage = config.get('cache', 'cache_max_age')
else:
maxage = 60
if (int(time.time()) - int(existing.st_mtime)) <= int(maxage):
return True
return False
def generate_inv_from_api(config):
try:
inventory['all'] = copy.deepcopy(EMPTY_GROUP)
auth_token = env_or_param(
'SCALEWAY_TOKEN', config.get('auth', 'api_token'))
if config.has_option('compute', 'regions'):
regions = config.get('compute', 'regions')
if regions == 'all':
regions = ScalewayAPI.REGIONS
else:
regions = map(str.strip, regions.split(','))
else:
regions = [
env_or_param('SCALEWAY_REGION', fallback='par1')
]
for region in regions:
api = ScalewayAPI(auth_token, region)
for server in api.servers():
hostname = server['hostname']
if config.has_option('defaults', 'public_ip_only') and config.getboolean('defaults', 'public_ip_only'):
ip = server['public_ip']['address']
else:
ip = server['private_ip']
for server_tag in server['tags']:
if server_tag not in inventory:
inventory[server_tag] = copy.deepcopy(EMPTY_GROUP)
inventory[server_tag]['children'].append(hostname)
if region not in inventory:
inventory[region] = copy.deepcopy(EMPTY_GROUP)
inventory[region]['children'].append(hostname)
inventory['all']['children'].append(hostname)
inventory[hostname] = []
inventory[hostname].append(ip)
return inventory
except Exception:
# Return empty hosts output
traceback.print_exc()
return {'all': {'hosts': []}, '_meta': {'hostvars': {}}}
def get_inventory(config):
''' Reads the inventory from cache or Scaleway api '''
if cache_available(config):
inv = get_cache('scaleway_ansible_inventory.json', config)
else:
inv = generate_inv_from_api(config)
save_cache(inv, config)
return json.dumps(inv)
if __name__ == '__main__':
inventory = {}
# Read config
if six.PY3:
config = configparser.ConfigParser()
else:
config = configparser.SafeConfigParser()
for configfilename in [os.path.abspath(sys.argv[0]).rsplit('.py')[0] + '.ini', 'scaleway.ini']:
if os.path.exists(configfilename):
config.read(configfilename)
break
if cache_available(config):
inventory = get_cache('scaleway_ansible_inventory.json', config)
else:
inventory = get_inventory(config)
# return to ansible
sys.stdout.write(str(inventory))
sys.stdout.flush()
|
