# vi: ts=4 expandtab # # Copyright (C) 2013 Canonical Ltd. # # Author: Ben Howard # # 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 . # # # 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 base64 from cloudinit import log as logging from cloudinit import sources from cloudinit import util import os import os.path import serial DEF_TTY_LOC = '/dev/ttyS1' DEF_TTY_TIMEOUT = 60 LOG = logging.getLogger(__name__) SMARTOS_ATTRIB_MAP = { #Cloud-init Key : (SmartOS Key, Strip line endings) 'local-hostname': ('hostname', True), 'public-keys': ('root_authorized_keys', True), 'user-script': ('user-script', False), 'user-data': ('user-data', False), 'iptables_disable': ('iptables_disable', True), 'motd_sys_info': ('motd_sys_info', True), } # These are values which will never be base64 encoded. # They come from the cloud platform, not user SMARTOS_NO_BASE64 = ['root_authorized_keys', 'motd_sys_info', 'iptables_disable'] 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.is_smartdc = None self.seed = self.ds_cfg.get("serial_device", DEF_TTY_LOC) self.seed_timeout = self.ds_cfg.get("serial_timeout", DEF_TTY_TIMEOUT) self.smartos_no_base64 = self.ds_cfg.get('no_base64_decode', SMARTOS_NO_BASE64) self.b64_keys = self.ds_cfg.get('base64_keys', []) self.b64_all = self.ds_cfg.get('base64_all', False) 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(self.seed): LOG.debug("Host does not appear to be on SmartOS") return False self.seed = self.seed dmi_info = dmi_data() if dmi_info is False: LOG.debug("No dmidata utility found") return False system_uuid, system_type = dmi_info if 'smartdc' not in system_type.lower(): LOG.debug("Host is not on SmartOS. system_type=%s", system_type) return False self.is_smartdc = True md['instance-id'] = system_uuid b64_keys = self.query('base64_keys', strip=True, b64=False) if b64_keys is not None: self.b64_keys = [k.strip() for k in str(b64_keys).split(',')] b64_all = self.query('base64_all', strip=True, b64=False) if b64_all is not None: self.b64_all = util.is_true(b64_all) for ci_noun, attribute in SMARTOS_ATTRIB_MAP.iteritems(): smartos_noun, strip = attribute md[ci_noun] = self.query(smartos_noun, strip=strip) if not md['local-hostname']: md['local-hostname'] = system_uuid ud = None if md['user-data']: ud = md['user-data'] elif md['user-script']: ud = md['user-script'] self.metadata = md self.userdata_raw = ud return True def get_instance_id(self): return self.metadata['instance-id'] def query(self, noun, strip=False, default=None, b64=None): if b64 is None: if noun in self.smartos_no_base64: b64 = False elif self.b64_all or noun in self.b64_keys: b64 = True return query_data(noun=noun, strip=strip, seed_device=self.seed, seed_timeout=self.seed_timeout, default=default, b64=b64) def get_serial(seed_device, seed_timeout): """This is replaced in unit testing, allowing us to replace serial.Serial with a mocked class. 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 seed_device: raise AttributeError("seed_device value is not set") ser = serial.Serial(seed_device, timeout=seed_timeout) if not ser.isOpen(): raise SystemError("Unable to open %s" % seed_device) return ser def query_data(noun, seed_device, seed_timeout, strip=False, default=None, b64=None): """Makes a request to via the serial console via "GET " 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. If the response is expected to be base64 encoded, then set b64encoded to true. Unfortantely, there is no way to know if something is 100% encoded, so this method relies on being told if the data is base64 or not. """ if not noun: return False ser = get_serial(seed_device, seed_timeout) ser.write("GET %s\n" % noun.rstrip()) status = str(ser.readline()).rstrip() response = [] eom_found = False if 'SUCCESS' not in status: ser.close() return default while not eom_found: m = ser.readline() if m.rstrip() == ".": eom_found = True else: response.append(m) ser.close() if b64 is None: b64 = query_data('b64-%s' % noun, seed_device=seed_device, seed_timeout=seed_timeout, b64=False, default=False, strip=True) b64 = util.is_true(b64) resp = None if b64 or strip: resp = "".join(response).rstrip() else: resp = "".join(response) if b64: try: return base64.b64decode(resp) except TypeError: LOG.warn("Failed base64 decoding key '%s'", noun) return resp return resp 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)