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
|
# vi: ts=4 expandtab
#
# Copyright (C) 2012 Canonical Ltd.
# Copyright (C) 2012 Cosmin Luta
# Copyright (C) 2012 Yahoo! Inc.
#
# Author: Cosmin Luta <q4break@gmail.com>
# Author: Scott Moser <scott.moser@canonical.com>
# Author: Joshua Harlow <harlowja@yahoo-inc.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 3, as
# published by the Free Software Foundation.
#
# This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
from socket import inet_ntoa
from struct import pack
import os
import time
import boto.utils as boto_utils
from cloudinit import log as logging
from cloudinit import sources
from cloudinit import url_helper as uhelp
from cloudinit import util
LOG = logging.getLogger(__name__)
class DataSourceCloudStack(sources.DataSource):
def __init__(self, sys_cfg, distro, paths):
sources.DataSource.__init__(self, sys_cfg, distro, paths)
self.seed_dir = os.path.join(paths.seed_dir, 'cs')
# Cloudstack has its metadata/userdata URLs located at
# http://<default-gateway-ip>/latest/
self.api_ver = 'latest'
gw_addr = self.get_default_gateway()
if not gw_addr:
raise RuntimeError("No default gateway found!")
self.metadata_address = "http://%s/" % (gw_addr)
def get_default_gateway(self):
"""Returns the default gateway ip address in the dotted format."""
lines = util.load_file("/proc/net/route").splitlines()
for line in lines:
items = line.split("\t")
if items[1] == "00000000":
# Found the default route, get the gateway
gw = inet_ntoa(pack("<L", int(items[2], 16)))
LOG.debug("Found default route, gateway is %s", gw)
return gw
return None
def __str__(self):
return util.obj_name(self)
def _get_url_settings(self):
mcfg = self.ds_cfg
if not mcfg:
mcfg = {}
max_wait = 120
try:
max_wait = int(mcfg.get("max_wait", max_wait))
except Exception:
util.logexc(LOG, "Failed to get max wait. using %s", max_wait)
if max_wait == 0:
return False
timeout = 50
try:
timeout = int(mcfg.get("timeout", timeout))
except Exception:
util.logexc(LOG, "Failed to get timeout, using %s", timeout)
return (max_wait, timeout)
def wait_for_metadata_service(self):
mcfg = self.ds_cfg
if not mcfg:
mcfg = {}
(max_wait, timeout) = self._get_url_settings()
urls = [self.metadata_address]
start_time = time.time()
url = uhelp.wait_for_url(urls=urls, max_wait=max_wait,
timeout=timeout, status_cb=LOG.warn)
if url:
LOG.debug("Using metadata source: '%s'", url)
else:
LOG.critical(("Giving up on waiting for the metadata from %s"
" after %s seconds"),
urls, int(time.time() - start_time))
return bool(url)
def get_data(self):
seed_ret = {}
if util.read_optional_seed(seed_ret, base=(self.seed_dir + "/")):
self.userdata_raw = seed_ret['user-data']
self.metadata = seed_ret['meta-data']
LOG.debug("Using seeded cloudstack data from: %s", self.seed_dir)
return True
try:
if not self.wait_for_metadata_service():
return False
start_time = time.time()
self.userdata_raw = boto_utils.get_instance_userdata(self.api_ver,
None, self.metadata_address)
self.metadata = boto_utils.get_instance_metadata(self.api_ver,
self.metadata_address)
LOG.debug("Crawl of metadata service took %s seconds",
int(time.time() - start_time))
return True
except Exception:
util.logexc(LOG, ('Failed fetching from metadata '
'service %s'), self.metadata_address)
return False
def get_instance_id(self):
return self.metadata['instance-id']
@property
def availability_zone(self):
return self.metadata['availability-zone']
# Used to match classes to dependencies
datasources = [
(DataSourceCloudStack, (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)
|
