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
|
# Copyright (C) 2014 Yahoo! Inc.
#
# Author: Joshua Harlow <harlowja@yahoo-inc.com>
#
# This file is part of cloud-init. See LICENSE file for license information.
import time
from cloudinit import log as logging
from cloudinit import sources
from cloudinit import url_helper
from cloudinit import util
from cloudinit.sources.helpers import openstack
LOG = logging.getLogger(__name__)
# Various defaults/constants...
DEF_MD_URL = "http://169.254.169.254"
DEFAULT_IID = "iid-dsopenstack"
DEFAULT_METADATA = {
"instance-id": DEFAULT_IID,
}
class DataSourceOpenStack(openstack.SourceMixin, sources.DataSource):
def __init__(self, sys_cfg, distro, paths):
super(DataSourceOpenStack, self).__init__(sys_cfg, distro, paths)
self.metadata_address = None
self.ssl_details = util.fetch_ssl_details(self.paths)
self.version = None
self.files = {}
self.ec2_metadata = None
def __str__(self):
root = sources.DataSource.__str__(self)
mstr = "%s [%s,ver=%s]" % (root, self.dsmode, self.version)
return mstr
def _get_url_settings(self):
# TODO(harlowja): this is shared with ec2 datasource, we should just
# move it to a shared location instead...
# Note: the defaults here are different though.
# max_wait < 0 indicates do not wait
max_wait = -1
timeout = 10
retries = 5
try:
max_wait = int(self.ds_cfg.get("max_wait", max_wait))
except Exception:
util.logexc(LOG, "Failed to get max wait. using %s", max_wait)
try:
timeout = max(0, int(self.ds_cfg.get("timeout", timeout)))
except Exception:
util.logexc(LOG, "Failed to get timeout, using %s", timeout)
try:
retries = int(self.ds_cfg.get("retries", retries))
except Exception:
util.logexc(LOG, "Failed to get max wait. using %s", retries)
return (max_wait, timeout, retries)
def wait_for_metadata_service(self):
urls = self.ds_cfg.get("metadata_urls", [DEF_MD_URL])
filtered = [x for x in urls if util.is_resolvable_url(x)]
if set(filtered) != set(urls):
LOG.debug("Removed the following from metadata urls: %s",
list((set(urls) - set(filtered))))
if len(filtered):
urls = filtered
else:
LOG.warning("Empty metadata url list! using default list")
urls = [DEF_MD_URL]
md_urls = []
url2base = {}
for url in urls:
md_url = url_helper.combine_url(url, 'openstack')
md_urls.append(md_url)
url2base[md_url] = url
(max_wait, timeout, retries) = self._get_url_settings()
start_time = time.time()
avail_url = url_helper.wait_for_url(urls=md_urls, max_wait=max_wait,
timeout=timeout)
if avail_url:
LOG.debug("Using metadata source: '%s'", url2base[avail_url])
else:
LOG.debug("Giving up on OpenStack md from %s after %s seconds",
md_urls, int(time.time() - start_time))
self.metadata_address = url2base.get(avail_url)
return bool(avail_url)
def get_data(self):
try:
if not self.wait_for_metadata_service():
return False
except IOError:
return False
(max_wait, timeout, retries) = self._get_url_settings()
try:
results = util.log_time(LOG.debug,
'Crawl of openstack metadata service',
read_metadata_service,
args=[self.metadata_address],
kwargs={'ssl_details': self.ssl_details,
'retries': retries,
'timeout': timeout})
except openstack.NonReadable:
return False
except (openstack.BrokenMetadata, IOError):
util.logexc(LOG, "Broken metadata address %s",
self.metadata_address)
return False
self.dsmode = self._determine_dsmode([results.get('dsmode')])
if self.dsmode == sources.DSMODE_DISABLED:
return False
md = results.get('metadata', {})
md = util.mergemanydict([md, DEFAULT_METADATA])
self.metadata = md
self.ec2_metadata = results.get('ec2-metadata')
self.userdata_raw = results.get('userdata')
self.version = results['version']
self.files.update(results.get('files', {}))
vd = results.get('vendordata')
self.vendordata_pure = vd
try:
self.vendordata_raw = sources.convert_vendordata(vd)
except ValueError as e:
LOG.warning("Invalid content in vendor-data: %s", e)
self.vendordata_raw = None
return True
def check_instance_id(self, sys_cfg):
# quickly (local check only) if self.instance_id is still valid
return sources.instance_id_matches_system_uuid(self.get_instance_id())
def read_metadata_service(base_url, ssl_details=None,
timeout=5, retries=5):
reader = openstack.MetadataReader(base_url, ssl_details=ssl_details,
timeout=timeout, retries=retries)
return reader.read_v2()
# Used to match classes to dependencies
datasources = [
(DataSourceOpenStack, (sources.DEP_FILESYSTEM, sources.DEP_NETWORK)),
]
# Return a list of data sources that match this set of dependencies
def get_datasource_list(depends):
return sources.list_from_depends(depends, datasources)
# vi: ts=4 expandtab
|
