# Copyright (C) 2012 Canonical Ltd.
# Copyright (C) 2012 Hewlett-Packard Development Company, L.P.
# Copyright (C) 2012 Yahoo! Inc.
#
# Author: Scott Moser <scott.moser@canonical.com>
# Author: Juerg Haefliger <juerg.haefliger@hp.com>
# Author: Joshua Harlow <harlowja@yahoo-inc.com>
#
# This file is part of cloud-init. See LICENSE file for license information.
import abc
import copy
import json
import os
from collections import namedtuple
from cloudinit import importer
from cloudinit import log as logging
from cloudinit import net
from cloudinit import type_utils
from cloudinit import user_data as ud
from cloudinit import util
from cloudinit.atomic_helper import write_json
from cloudinit.event import EventType
from cloudinit.filters import launch_index
from cloudinit.reporting import events
DSMODE_DISABLED = "disabled"
DSMODE_LOCAL = "local"
DSMODE_NETWORK = "net"
DSMODE_PASS = "pass"
VALID_DSMODES = [DSMODE_DISABLED, DSMODE_LOCAL, DSMODE_NETWORK]
DEP_FILESYSTEM = "FILESYSTEM"
DEP_NETWORK = "NETWORK"
DS_PREFIX = 'DataSource'
EXPERIMENTAL_TEXT = (
"EXPERIMENTAL: The structure and format of content scoped under the 'ds'"
" key may change in subsequent releases of cloud-init.")
# File in which public available instance meta-data is written
# security-sensitive key values are redacted from this world-readable file
INSTANCE_JSON_FILE = 'instance-data.json'
# security-sensitive key values are present in this root-readable file
INSTANCE_JSON_SENSITIVE_FILE = 'instance-data-sensitive.json'
REDACT_SENSITIVE_VALUE = 'redacted for non-root user'
# Key which can be provide a cloud's official product name to cloud-init
METADATA_CLOUD_NAME_KEY = 'cloud-name'
UNSET = "_unset"
METADATA_UNKNOWN = 'unknown'
LOG = logging.getLogger(__name__)
# CLOUD_ID_REGION_PREFIX_MAP format is:
# <region-match-prefix>: (<new-cloud-id>: <test_allowed_cloud_callable>)
CLOUD_ID_REGION_PREFIX_MAP = {
'cn-': ('aws-china', lambda c: c == 'aws'), # only change aws regions
'us-gov-': ('aws-gov', lambda c: c == 'aws'), # only change aws regions
'china': ('azure-china', lambda c: c == 'azure'), # only change azure
}
# NetworkConfigSource represents the canonical list of network config sources
# that cloud-init knows about. (Python 2.7 lacks PEP 435, so use a singleton
# namedtuple as an enum; see https://stackoverflow.com/a/6971002)
_NETCFG_SOURCE_NAMES = ('cmdline', 'ds', 'system_cfg', 'fallback', 'initramfs')
NetworkConfigSource = namedtuple('NetworkConfigSource',
_NETCFG_SOURCE_NAMES)(*_NETCFG_SOURCE_NAMES)
class DataSourceNotFoundException(Exception):
pass
class InvalidMetaDataException(Exception):
"""Raised when metadata is broken, unavailable or disabled."""
def process_instance_metadata(metadata, key_path='', sensitive_keys=()):
"""Process all instance metadata cleaning it up for persisting as json.
Strip ci-b64 prefix and catalog any 'base64_encoded_keys' as a list
@return Dict copy of processed metadata.
"""
md_copy = copy.deepcopy(metadata)
base64_encoded_keys = []
sens_keys = []
for key, val in metadata.items():
if key_path:
sub_key_path = key_path + '/' + key
else:
sub_key_path = key
if key in sensitive_keys or sub_key_path in sensitive_keys:
sens_keys.append(sub_key_path)
if isinstance(val, str) and val.startswith('ci-b64:'):
base64_encoded_keys.append(sub_key_path)
md_copy[key] = val.replace('ci-b64:', '')
if isinstance(val, dict):
return_val = process_instance_metadata(
val, sub_key_path, sensitive_keys)
base64_encoded_keys.extend(return_val.pop('base64_encoded_keys'))
sens_keys.extend(return_val.pop('sensitive_keys'))
md_copy[key] = return_val
md_copy['base64_encoded_keys'] = sorted(base64_encoded_keys)
md_copy['sensitive_keys'] = sorted(sens_keys)
return md_copy
def redact_sensitive_keys(metadata, redact_value=REDACT_SENSITIVE_VALUE):
"""Redact any sensitive keys from to provided metadata dictionary.
Replace any keys values listed in 'sensitive_keys' with redact_value.
"""
if not metadata.get('sensitive_keys', []):
return metadata
md_copy = copy.deepcopy(metadata)
for key_path in metadata.get('sensitive_keys'):
path_parts = key_path.split('/')
obj = md_copy
for path in path_parts:
if isinstance(obj[path], dict) and path != path_parts[-1]:
obj = obj[path]
obj[path] = redact_value
return md_copy
URLParams = namedtuple(
'URLParms', ['max_wait_seconds', 'timeout_seconds', 'num_retries'])
class DataSource(metaclass=abc.ABCMeta):
dsmode = DSMODE_NETWORK
default_locale = 'en_US.UTF-8'
# Datasource name needs to be set by subclasses to determine which
# cloud-config datasource key is loaded
dsname = '_undef'
# Cached cloud_name as determined by _get_cloud_name
_cloud_name = None
# Cached cloud platform api type: e.g. ec2, openstack, kvm, lxd, azure etc.
_platform_type = None
# More details about the cloud platform:
# - metadata (http://169.254.169.254/)
# - seed-dir (<dirname>)
_subplatform = None
# Track the discovered fallback nic for use in configuration generation.
_fallback_interface = None
# The network configuration sources that should be considered for this data
# source. (The first source in this list that provides network
# configuration will be used without considering any that follow.) This
# should always be a subset of the members of NetworkConfigSource with no
# duplicate entries.
network_config_sources = (NetworkConfigSource.cmdline,
NetworkConfigSource.initramfs,
NetworkConfigSource.system_cfg,
NetworkConfigSource.ds)
# read_url_params
url_max_wait = -1 # max_wait < 0 means do not wait
url_timeout = 10 # timeout for each metadata url read attempt
url_retries = 5 # number of times to retry url upon 404
# The datasource defines a set of supported EventTypes during which
# the datasource can react to changes in metadata and regenerate
# network configuration on metadata changes.
# A datasource which supports writing network config on each system boot
# would call update_events['network'].add(EventType.BOOT).
# Default: generate network config on new instance id (first boot).
update_events = {'network': set([EventType.BOOT_NEW_INSTANCE])}
# N-tuple listing default values for any metadata-related class
# attributes cached on an instance by a process_data runs. These attribute
# values are reset via clear_cached_attrs during any update_metadata call.
cached_attr_defaults = (
('ec2_metadata', UNSET), ('network_json', UNSET),
('metadata', {}), ('userdata', None), ('userdata_raw', None),
('vendordata', None), ('vendordata_raw', None))
_dirty_cache = False
# N-tuple of keypaths or keynames redact from instance-data.json for
# non-root users
sensitive_metadata_keys = ('merged_cfg', 'security-credentials',)
def __init__(self, sys_cfg, distro, paths, ud_proc=None):
self.sys_cfg = sys_cfg
self.distro = distro
self.paths = paths
self.userdata = None
self.metadata = {}
self.userdata_raw = None
self.vendordata = None
self.vendordata_raw = None
self.ds_cfg = util.get_cfg_by_path(
self.sys_cfg, ("datasource", self.dsname), {})
if not self.ds_cfg:
self.ds_cfg = {}
if not ud_proc:
self.ud_proc = ud.UserDataProcessor(self.paths)
else:
self.ud_proc = ud_proc
def __str__(self):
return type_utils.obj_name(self)
def _get_standardized_metadata(self, instance_data):
"""Return a dictionary of standardized metadata keys."""
local_hostname = self.get_hostname()
instance_id = self.get_instance_id()
availability_zone = self.availability_zone
# In the event of upgrade from existing cloudinit, pickled datasource
# will not contain these new class attributes. So we need to recrawl
# metadata to discover that content
sysinfo = instance_data["sys_info"]
return {
'v1': {
'_beta_keys': ['subplatform'],
'availability-zone': availability_zone,
'availability_zone': availability_zone,
'cloud-name': self.cloud_name,
'cloud_name': self.cloud_name,
'distro': sysinfo["dist"][0],
'distro_version': sysinfo["dist"][1],
'distro_release': sysinfo["dist"][2],
'platform': self.platform_type,
'public_ssh_keys': self.get_public_ssh_keys(),
'python_version': sysinfo["python"],
'instance-id': instance_id,
'instance_id': instance_id,
'kernel_release': sysinfo["uname"][2],
'local-hostname': local_hostname,
'local_hostname': local_hostname,
'machine': sysinfo["uname"][4],
'region': self.region,
'subplatform': self.subplatform,
'system_platform': sysinfo["platform"],
'variant': sysinfo["variant"]}}
def clear_cached_attrs(self, attr_defaults=()):
"""Reset any cached metadata attributes to datasource defaults.
@param attr_defaults: Optional tuple of (attr, value) pairs to
set instead of cached_attr_defaults.
"""
if not self._dirty_cache:
return
if attr_defaults:
attr_values = attr_defaults
else:
attr_values = self.cached_attr_defaults
for attribute, value in attr_values:
if hasattr(self, attribute):
setattr(self, attribute, value)
if not attr_defaults:
self._dirty_cache = False
def get_data(self):
"""Datasources implement _get_data to setup metadata and userdata_raw.
Minimally, the datasource should return a boolean True on success.
"""
self._dirty_cache = True
return_value = self._get_data()
if not return_value:
return return_value
self.persist_instance_data()
return return_value
def persist_instance_data(self):
"""Process and write INSTANCE_JSON_FILE with all instance metadata.
Replace any hyphens with underscores in key names for use in template
processing.
@return True on successful write, False otherwise.
"""
if hasattr(self, '_crawled_metadata'):
# Any datasource with _crawled_metadata will best represent
# most recent, 'raw' metadata
crawled_metadata = copy.deepcopy(
getattr(self, '_crawled_metadata'))
crawled_metadata.pop('user-data', None)
crawled_metadata.pop('vendor-data', None)
instance_data = {'ds': crawled_metadata}
else:
instance_data = {'ds': {'meta_data': self.metadata}}
if hasattr(self, 'network_json'):
network_json = getattr(self, 'network_json')
if network_json != UNSET:
instance_data['ds']['network_json'] = network_json
if hasattr(self, 'ec2_metadata'):
ec2_metadata = getattr(self, 'ec2_metadata')
if ec2_metadata != UNSET:
instance_data['ds']['ec2_metadata'] = ec2_metadata
instance_data['ds']['_doc'] = EXPERIMENTAL_TEXT
# Add merged cloud.cfg and sys info for jinja templates and cli query
instance_data['merged_cfg'] = copy.deepcopy(self.sys_cfg)
instance_data['merged_cfg']['_doc'] = (
'Merged cloud-init system config from /etc/cloud/cloud.cfg and'
' /etc/cloud/cloud.cfg.d/')
instance_data['sys_info'] = util.system_info()
instance_data.update(
self._get_standardized_metadata(instance_data))
try:
# Process content base64encoding unserializable values
content = util.json_dumps(instance_data)
# Strip base64: prefix and set base64_encoded_keys list.
processed_data = process_instance_metadata(
json.loads(content),
sensitive_keys=self.sensitive_metadata_keys)
except TypeError as e:
LOG.warning('Error persisting instance-data.json: %s', str(e))
return False
except UnicodeDecodeError as e:
LOG.warning('Error persisting instance-data.json: %s', str(e))
return False
json_sensitive_file = os.path.join(self.paths.run_dir,
INSTANCE_JSON_SENSITIVE_FILE)
write_json(json_sensitive_file, processed_data, mode=0o600)
json_file = os.path.join(self.paths.run_dir, INSTANCE_JSON_FILE)
# World readable
write_json(json_file, redact_sensitive_keys(processed_data))
return True
def _get_data(self):
"""Walk metadata sources, process crawled data and save attributes."""
raise NotImplementedError(
'Subclasses of DataSource must implement _get_data which'
' sets self.metadata, vendordata_raw and userdata_raw.')
def get_url_params(self):
"""Return the Datasource's prefered url_read parameters.
Subclasses may override url_max_wait, url_timeout, url_retries.
@return: A URLParams object with max_wait_seconds, timeout_seconds,
num_retries.
"""
max_wait = self.url_max_wait
try:
max_wait = int(self.ds_cfg.get("max_wait", self.url_max_wait))
except ValueError:
util.logexc(
LOG, "Config max_wait '%s' is not an int, using default '%s'",
self.ds_cfg.get("max_wait"), max_wait)
timeout = self.url_timeout
try:
timeout = max(
0, int(self.ds_cfg.get("timeout", self.url_timeout)))
except ValueError:
timeout = self.url_timeout
util.logexc(
LOG, "Config timeout '%s' is not an int, using default '%s'",
self.ds_cfg.get('timeout'), timeout)
retries = self.url_retries
try:
retries = int(self.ds_cfg.get("retries", self.url_retries))
except Exception:
util.logexc(
LOG, "Config retries '%s' is not an int, using default '%s'",
self.ds_cfg.get('retries'), retries)
return URLParams(max_wait, timeout, retries)
def get_userdata(self, apply_filter=False):
if self.userdata is None:
self.userdata = self.ud_proc.process(self.get_userdata_raw())
if apply_filter:
return self._filter_xdata(self.userdata)
return self.userdata
def get_vendordata(self):
if self.vendordata is None:
self.vendordata = self.ud_proc.process(self.get_vendordata_raw())
return self.vendordata
@property
def fallback_interface(self):
"""Determine the network interface used during local network config."""
if self._fallback_interface is None:
self._fallback_interface = net.find_fallback_nic()
if self._fallback_interface is None:
LOG.warning(
"Did not find a fallback interface on %s.",
self.cloud_name)
return self._fallback_interface
@property
def platform_type(self):
if not hasattr(self, '_platform_type'):
# Handle upgrade path where pickled datasource has no _platform.
self._platform_type = self.dsname.lower()
if not self._platform_type:
self._platform_type = self.dsname.lower()
return self._platform_type
@property
def subplatform(self):
"""Return a string representing subplatform details for the datasource.
This should be guidance for where the metadata is sourced.
Examples of this on different clouds:
ec2: metadata (http://169.254.169.254)
openstack: configdrive (/dev/path)
openstack: metadata (http://169.254.169.254)
nocloud: seed-dir (/seed/dir/path)
lxd: nocloud (/seed/dir/path)
"""
if not hasattr(self, '_subplatform'):
# Handle upgrade path where pickled datasource has no _platform.
self._subplatform = self._get_subplatform()
if not self._subplatform:
self._subplatform = self._get_subplatform()
return self._subplatform
def _get_subplatform(self):
"""Subclasses should implement to return a "slug (detail)" string."""
if hasattr(self, 'metadata_address'):
return 'metadata (%s)' % getattr(self, 'metadata_address')
return METADATA_UNKNOWN
@property
def cloud_name(self):
"""Return lowercase cloud name as determined by the datasource.
Datasource can determine or define its own cloud product name in
metadata.
"""
if self._cloud_name:
return self._cloud_name
if self.metadata and self.metadata.get(METADATA_CLOUD_NAME_KEY):
cloud_name = self.metadata.get(METADATA_CLOUD_NAME_KEY)
if isinstance(cloud_name, str):
self._cloud_name = cloud_name.lower()
else:
self._cloud_name = self._get_cloud_name().lower()
LOG.debug(
'Ignoring metadata provided key %s: non-string type %s',
METADATA_CLOUD_NAME_KEY, type(cloud_name))
else:
self._cloud_name = self._get_cloud_name().lower()
return self._cloud_name
def _get_cloud_name(self):
"""Return the datasource name as it frequently matches cloud name.
Should be overridden in subclasses which can run on multiple
cloud names, such as DatasourceEc2.
"""
return self.dsname
@property
def launch_index(self):
if not self.metadata:
return None
if 'launch-index' in self.metadata:
return self.metadata['launch-index']
return None
def _filter_xdata(self, processed_ud):
filters = [
launch_index.Filter(util.safe_int(self.launch_index)),
]
new_ud = processed_ud
for f in filters:
new_ud = f.apply(new_ud)
return new_ud
@property
def is_disconnected(self):
return False
def get_userdata_raw(self):
return self.userdata_raw
def get_vendordata_raw(self):
return self.vendordata_raw
# the data sources' config_obj is a cloud-config formated
# object that came to it from ways other than cloud-config
# because cloud-config content would be handled elsewhere
def get_config_obj(self):
return {}
def get_public_ssh_keys(self):
return normalize_pubkey_data(self.metadata.get('public-keys'))
def publish_host_keys(self, hostkeys):
"""Publish the public SSH host keys (found in /etc/ssh/*.pub).
@param hostkeys: List of host key tuples (key_type, key_value),
where key_type is the first field in the public key file
(e.g. 'ssh-rsa') and key_value is the key itself
(e.g. 'AAAAB3NzaC1y...').
"""
def _remap_device(self, short_name):
# LP: #611137
# the metadata service may believe that devices are named 'sda'
# when the kernel named them 'vda' or 'xvda'
# we want to return the correct value for what will actually
# exist in this instance
mappings = {"sd": ("vd", "xvd", "vtb")}
for (nfrom, tlist) in mappings.items():
if not short_name.startswith(nfrom):
continue
for nto in tlist:
cand = "/dev/%s%s" % (nto, short_name[len(nfrom):])
if os.path.exists(cand):
return cand
return None
def device_name_to_device(self, _name):
# translate a 'name' to a device
# the primary function at this point is on ec2
# to consult metadata service, that has
# ephemeral0: sdb
# and return 'sdb' for input 'ephemeral0'
return None
def get_locale(self):
"""Default locale is en_US.UTF-8, but allow distros to override"""
locale = self.default_locale
try:
locale = self.distro.get_locale()
except NotImplementedError:
pass
return locale
@property
def availability_zone(self):
top_level_az = self.metadata.get(
'availability-zone', self.metadata.get('availability_zone'))
if top_level_az:
return top_level_az
return self.metadata.get('placement', {}).get('availability-zone')
@property
def region(self):
return self.metadata.get('region')
def get_instance_id(self):
if not self.metadata or 'instance-id' not in self.metadata:
# Return a magic not really instance id string
return "iid-datasource"
return str(self.metadata['instance-id'])
def get_hostname(self, fqdn=False, resolve_ip=False, metadata_only=False):
"""Get hostname or fqdn from the datasource. Look it up if desired.
@param fqdn: Boolean, set True to return hostname with domain.
@param resolve_ip: Boolean, set True to attempt to resolve an ipv4
address provided in local-hostname meta-data.
@param metadata_only: Boolean, set True to avoid looking up hostname
if meta-data doesn't have local-hostname present.
@return: hostname or qualified hostname. Optionally return None when
metadata_only is True and local-hostname data is not available.
"""
defdomain = "localdomain"
defhost = "localhost"
domain = defdomain
if not self.metadata or not self.metadata.get('local-hostname'):
if metadata_only:
return None
# this is somewhat questionable really.
# the cloud datasource was asked for a hostname
# and didn't have one. raising error might be more appropriate
# but instead, basically look up the existing hostname
toks = []
hostname = util.get_hostname()
hosts_fqdn = util.get_fqdn_from_hosts(hostname)
if hosts_fqdn and hosts_fqdn.find(".") > 0:
toks = str(hosts_fqdn).split(".")
elif hostname and hostname.find(".") > 0:
toks = str(hostname).split(".")
elif hostname:
toks = [hostname, defdomain]
else:
toks = [defhost, defdomain]
else:
# if there is an ipv4 address in 'local-hostname', then
# make up a hostname (LP: #475354) in format ip-xx.xx.xx.xx
lhost = self.metadata['local-hostname']
if net.is_ipv4_address(lhost):
toks = []
if resolve_ip:
toks = util.gethostbyaddr(lhost)
if toks:
toks = str(toks).split('.')
else:
toks = ["ip-%s" % lhost.replace(".", "-")]
else:
toks = lhost.split(".")
if len(toks) > 1:
hostname = toks[0]
domain = '.'.join(toks[1:])
else:
hostname = toks[0]
if fqdn and domain != defdomain:
return "%s.%s" % (hostname, domain)
else:
return hostname
def get_package_mirror_info(self):
return self.distro.get_package_mirror_info(data_source=self)
def update_metadata(self, source_event_types):
"""Refresh cached metadata if the datasource supports this event.
The datasource has a list of update_events which
trigger refreshing all cached metadata as well as refreshing the
network configuration.
@param source_event_types: List of EventTypes which may trigger a
metadata update.
@return True if the datasource did successfully update cached metadata
due to source_event_type.
"""
supported_events = {}
for event in source_event_types:
for update_scope, update_events in self.update_events.items():
if event in update_events:
if not supported_events.get(update_scope):
supported_events[update_scope] = set()
supported_events[update_scope].add(event)
for scope, matched_events in supported_events.items():
LOG.debug(
"Update datasource metadata and %s config due to events: %s",
scope, ', '.join(matched_events))
# Each datasource has a cached config property which needs clearing
# Once cleared that config property will be regenerated from
# current metadata.
self.clear_cached_attrs((('_%s_config' % scope, UNSET),))
if supported_events:
self.clear_cached_attrs()
result = self.get_data()
if result:
return True
LOG.debug("Datasource %s not updated for events: %s", self,
', '.join(source_event_types))
return False
def check_instance_id(self, sys_cfg):
# quickly (local check only) if self.instance_id is still
return False
@staticmethod
def _determine_dsmode(candidates, default=None, valid=None):
# return the first candidate that is non None, warn if not valid
if default is None:
default = DSMODE_NETWORK
if valid is None:
valid = VALID_DSMODES
for candidate in candidates:
if candidate is None:
continue
if candidate in valid:
return candidate
else:
LOG.warning("invalid dsmode '%s', using default=%s",
candidate, default)
return default
return default
@property
def network_config(self):
return None
@property
def first_instance_boot(self):
return
def setup(self, is_new_instance):
"""setup(is_new_instance)
This is called before user-data and vendor-data have been processed.
Unless the datasource has set mode to 'local', then networking
per 'fallback' or per 'network_config' will have been written and
brought up the OS at this point.
"""
return
def activate(self, cfg, is_new_instance):
"""activate(cfg, is_new_instance)
This is called before the init_modules will be called but after
the user-data and vendor-data have been fully processed.
The cfg is fully up to date config, it contains a merged view of
system config, datasource config, user config, vendor config.
It should be used rather than the sys_cfg passed to __init__.
is_new_instance is a boolean indicating if this is a new instance.
"""
return
def normalize_pubkey_data(pubkey_data):
keys = []
if not pubkey_data:
return keys
if isinstance(pubkey_data, str):
return pubkey_data.splitlines()
if isinstance(pubkey_data, (list, set)):
return list(pubkey_data)
if isinstance(pubkey_data, (dict)):
for (_keyname, klist) in pubkey_data.items():
# lp:506332 uec metadata service responds with
# data that makes boto populate a string for 'klist' rather
# than a list.
if isinstance(klist, str):
klist = [klist]
if isinstance(klist, (list, set)):
for pkey in klist:
# There is an empty string at
# the end of the keylist, trim it
if pkey:
keys.append(pkey)
return keys
def find_source(sys_cfg, distro, paths, ds_deps, cfg_list, pkg_list, reporter):
ds_list = list_sources(cfg_list, ds_deps, pkg_list)
ds_names = [type_utils.obj_name(f) for f in ds_list]
mode = "network" if DEP_NETWORK in ds_deps else "local"
LOG.debug("Searching for %s data source in: %s", mode, ds_names)
for name, cls in zip(ds_names, ds_list):
myrep = events.ReportEventStack(
name="search-%s" % name.replace("DataSource", ""),
description="searching for %s data from %s" % (mode, name),
message="no %s data found from %s" % (mode, name),
parent=reporter)
try:
with myrep:
LOG.debug("Seeing if we can get any data from %s", cls)
s = cls(sys_cfg, distro, paths)
if s.update_metadata([EventType.BOOT_NEW_INSTANCE]):
myrep.message = "found %s data from %s" % (mode, name)
return (s, type_utils.obj_name(cls))
except Exception:
util.logexc(LOG, "Getting data from %s failed", cls)
msg = ("Did not find any data source,"
" searched classes: (%s)") % (", ".join(ds_names))
raise DataSourceNotFoundException(msg)
# Return a list of classes that have the same depends as 'depends'
# iterate through cfg_list, loading "DataSource*" modules
# and calling their "get_datasource_list".
# Return an ordered list of classes that match (if any)
def list_sources(cfg_list, depends, pkg_list):
src_list = []
LOG.debug(("Looking for data source in: %s,"
" via packages %s that matches dependencies %s"),
cfg_list, pkg_list, depends)
for ds_name in cfg_list:
if not ds_name.startswith(DS_PREFIX):
ds_name = '%s%s' % (DS_PREFIX, ds_name)
m_locs, _looked_locs = importer.find_module(ds_name,
pkg_list,
['get_datasource_list'])
for m_loc in m_locs:
mod = importer.import_module(m_loc)
lister = getattr(mod, "get_datasource_list")
matches = lister(depends)
if matches:
src_list.extend(matches)
break
return src_list
def instance_id_matches_system_uuid(instance_id, field='system-uuid'):
# quickly (local check only) if self.instance_id is still valid
# we check kernel command line or files.
if not instance_id:
return False
dmi_value = util.read_dmi_data(field)
if not dmi_value:
return False
return instance_id.lower() == dmi_value.lower()
def canonical_cloud_id(cloud_name, region, platform):
"""Lookup the canonical cloud-id for a given cloud_name and region."""
if not cloud_name:
cloud_name = METADATA_UNKNOWN
if not region:
region = METADATA_UNKNOWN
if region == METADATA_UNKNOWN:
if cloud_name != METADATA_UNKNOWN:
return cloud_name
return platform
for prefix, cloud_id_test in CLOUD_ID_REGION_PREFIX_MAP.items():
(cloud_id, valid_cloud) = cloud_id_test
if region.startswith(prefix) and valid_cloud(cloud_name):
return cloud_id
if cloud_name != METADATA_UNKNOWN:
return cloud_name
return platform
def convert_vendordata(data, recurse=True):
"""data: a loaded object (strings, arrays, dicts).
return something suitable for cloudinit vendordata_raw.
if data is:
None: return None
string: return string
list: return data
the list is then processed in UserDataProcessor
dict: return convert_vendordata(data.get('cloud-init'))
"""
if not data:
return None
if isinstance(data, str):
return data
if isinstance(data, list):
return copy.deepcopy(data)
if isinstance(data, dict):
if recurse is True:
return convert_vendordata(data.get('cloud-init'),
recurse=False)
raise ValueError("vendordata['cloud-init'] cannot be dict")
raise ValueError("Unknown data type for vendordata: %s" % type(data))
class BrokenMetadata(IOError):
pass
# 'depends' is a list of dependencies (DEP_FILESYSTEM)
# ds_list is a list of 2 item lists
# ds_list = [
# ( class, ( depends-that-this-class-needs ) )
# }
# It returns a list of 'class' that matched these deps exactly
# It mainly is a helper function for DataSourceCollections
def list_from_depends(depends, ds_list):
ret_list = []
depset = set(depends)
for (cls, deps) in ds_list:
if depset == set(deps):
ret_list.append(cls)
return ret_list
# vi: ts=4 expandtab