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
|
# vi: ts=4 expandtab
#
# Copyright (C) 2014 CloudSigma
#
# Author: Kiril Vladimiroff <kiril.vladimiroff@cloudsigma.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 base64 import b64decode
import os
import re
from cloudinit import log as logging
from cloudinit import sources
from cloudinit import util
from cloudinit.cs_utils import Cepko
LOG = logging.getLogger(__name__)
VALID_DSMODES = ("local", "net", "disabled")
class DataSourceCloudSigma(sources.DataSource):
"""
Uses cepko in order to gather the server context from the VM.
For more information about CloudSigma's Server Context:
http://cloudsigma-docs.readthedocs.org/en/latest/server_context.html
"""
def __init__(self, sys_cfg, distro, paths):
self.dsmode = 'local'
self.cepko = Cepko()
self.ssh_public_key = ''
sources.DataSource.__init__(self, sys_cfg, distro, paths)
def is_running_in_cloudsigma(self):
"""
Uses dmidecode to detect if this instance of cloud-init is running
in the CloudSigma's infrastructure.
"""
uname_arch = os.uname()[4]
if uname_arch.startswith("arm") or uname_arch == "aarch64":
# Disabling because dmidecode in CMD_DMI_SYSTEM crashes kvm process
LOG.debug("Disabling CloudSigma datasource on arm (LP: #1243287)")
return False
dmidecode_path = util.which('dmidecode')
if not dmidecode_path:
return False
LOG.debug("Determining hypervisor product name via dmidecode")
try:
cmd = [dmidecode_path, "--string", "system-product-name"]
system_product_name, _ = util.subp(cmd)
return 'cloudsigma' in system_product_name.lower()
except:
LOG.warn("Failed to get hypervisor product name via dmidecode")
return False
def get_data(self):
"""
Metadata is the whole server context and /meta/cloud-config is used
as userdata.
"""
dsmode = None
if not self.is_running_in_cloudsigma():
return False
try:
server_context = self.cepko.all().result
server_meta = server_context['meta']
except:
# TODO: check for explicit "config on", and then warn
# but since no explicit config is available now, just debug.
LOG.debug("CloudSigma: Unable to read from serial port")
return False
dsmode = server_meta.get('cloudinit-dsmode', self.dsmode)
if dsmode not in VALID_DSMODES:
LOG.warn("Invalid dsmode %s, assuming default of 'net'", dsmode)
dsmode = 'net'
if dsmode == "disabled" or dsmode != self.dsmode:
return False
base64_fields = server_meta.get('base64_fields', '').split(',')
self.userdata_raw = server_meta.get('cloudinit-user-data', "")
if 'cloudinit-user-data' in base64_fields:
self.userdata_raw = b64decode(self.userdata_raw)
self.metadata = server_context
self.ssh_public_key = server_meta['ssh_public_key']
return True
def get_hostname(self, fqdn=False, resolve_ip=False):
"""
Cleans up and uses the server's name if the latter is set. Otherwise
the first part from uuid is being used.
"""
if re.match(r'^[A-Za-z0-9 -_\.]+$', self.metadata['name']):
return self.metadata['name'][:61]
else:
return self.metadata['uuid'].split('-')[0]
def get_public_ssh_keys(self):
return [self.ssh_public_key]
def get_instance_id(self):
return self.metadata['uuid']
class DataSourceCloudSigmaNet(DataSourceCloudSigma):
def __init__(self, sys_cfg, distro, paths):
DataSourceCloudSigma.__init__(self, sys_cfg, distro, paths)
self.dsmode = 'net'
# Used to match classes to dependencies. Since this datasource uses the serial
# port network is not really required, so it's okay to load without it, too.
datasources = [
(DataSourceCloudSigma, (sources.DEP_FILESYSTEM)),
(DataSourceCloudSigmaNet, (sources.DEP_FILESYSTEM, sources.DEP_NETWORK)),
]
def get_datasource_list(depends):
"""
Return a list of data sources that match this set of dependencies
"""
return sources.list_from_depends(depends, datasources)
|
