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# vi: ts=4 expandtab
#
# Copyright (C) 2013 Canonical Ltd.
#
# Author: Ben Howard <ben.howard@canonical.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/>.
#
#
# Datasource for provisioning on SmartOS. This works on Joyent
# and public/private Clouds using SmartOS.
#
# SmartOS hosts use a serial console (/dev/ttyS1) on Linux Guests.
# The meta-data is transmitted via key/value pairs made by
# requests on the console. For example, to get the hostname, you
# would send "GET hostname" on /dev/ttyS1.
#
import os
import os.path
import serial
from cloudinit import log as logging
from cloudinit import sources
from cloudinit import util
TTY_LOC = '/dev/ttyS1'
LOG = logging.getLogger(__name__)
class DataSourceSmartOS(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, 'sdc')
self.seed = None
self.is_smartdc = None
def __str__(self):
root = sources.DataSource.__str__(self)
return "%s [seed=%s]" % (root, self.seed)
def get_data(self):
md = {}
ud = ""
if not os.path.exists(TTY_LOC):
LOG.debug("Host does not appear to be on SmartOS")
return False
self.seed = TTY_LOC
system_uuid, system_type = dmi_data()
if 'smartdc' not in system_type.lower():
LOG.debug("Host is not on SmartOS")
return False
self.is_smartdc = True
hostname = query_data("hostname", strip=True)
if not hostname:
hostname = system_uuid
md['local-hostname'] = hostname
md['instance-id'] = system_uuid
md['public-keys'] = query_data("root_authorized_keys", strip=True)
ud = query_data("user-script")
md['iptables_disable'] = query_data("disable_iptables_flag",
strip=True)
md['motd_sys_info'] = query_data("enable_motd_sys_info", strip=True)
self.metadata = md
self.userdata_raw = ud
return True
def get_instance_id(self):
return self.metadata['instance-id']
def get_serial():
"""This is replaced in unit testing, allowing us to replace
serial.Serial with a mocked class"""
return serial.Serial()
def query_data(noun, strip=False):
"""Makes a request to via the serial console via "GET <NOUN>"
In the response, the first line is the status, while subsequent lines
are is the value. A blank line with a "." is used to indicate end of
response.
The timeout value of 60 seconds should never be hit. The value
is taken from SmartOS own provisioning tools. Since we are reading
each line individually up until the single ".", the transfer is
usually very fast (i.e. microseconds) to get the response.
"""
if not noun:
return False
ser = get_serial()
ser.port = '/dev/ttyS1'
ser.open()
if not ser.isOpen():
LOG.debug("Serial console is not open")
return False
ser.write("GET %s\n" % noun.rstrip())
status = str(ser.readline()).rstrip()
response = []
eom_found = False
if 'SUCCESS' not in status:
ser.close()
return None
while not eom_found:
m = ser.readline()
if m.rstrip() == ".":
eom_found = True
else:
response.append(m)
ser.close()
if not strip:
return "".join(response)
else:
return "".join(response).rstrip()
return None
def dmi_data():
sys_uuid, sys_type = None, None
dmidecode_path = util.which('dmidecode')
if not dmidecode_path:
return False
sys_uuid_cmd = [dmidecode_path, "-s", "system-uuid"]
try:
LOG.debug("Getting hostname from dmidecode")
(sys_uuid, _err) = util.subp(sys_uuid_cmd)
except Exception as e:
util.logexc(LOG, "Failed to get system UUID", e)
sys_type_cmd = [dmidecode_path, "-s", "system-product-name"]
try:
LOG.debug("Determining hypervisor product name via dmidecode")
(sys_type, _err) = util.subp(sys_type_cmd)
except Exception as e:
util.logexc(LOG, "Failed to get system UUID", e)
return sys_uuid.lower(), sys_type
# Used to match classes to dependencies
datasources = [
(DataSourceSmartOS, (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)
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