File Content: DataSourceOpenStack.py # Copyright (C) 2014 Yahoo! Inc. # # Author: Joshua Harlow <harlowja@yahoo-inc.com> # # This file is part of cloud-init. See LICENSE file for license information. import time from cloudinit import log as logging from cloudinit.net.dhcp import EphemeralDHCPv4, NoDHCPLeaseError from cloudinit import sources from cloudinit import url_helper from cloudinit import util from cloudinit.sources.helpers import openstack from cloudinit.sources import DataSourceOracle as oracle LOG = logging.getLogger(__name__) # Various defaults/constants... DEF_MD_URL = "http://169.254.169.254" DEFAULT_IID = "iid-dsopenstack" DEFAULT_METADATA = { "instance-id": DEFAULT_IID, } # OpenStack DMI constants DMI_PRODUCT_NOVA = 'OpenStack Nova' DMI_PRODUCT_COMPUTE = 'OpenStack Compute' VALID_DMI_PRODUCT_NAMES = [DMI_PRODUCT_NOVA, DMI_PRODUCT_COMPUTE] DMI_ASSET_TAG_OPENTELEKOM = 'OpenTelekomCloud' VALID_DMI_ASSET_TAGS = [DMI_ASSET_TAG_OPENTELEKOM] class DataSourceOpenStack(openstack.SourceMixin, sources.DataSource): dsname = "OpenStack" _network_config = sources.UNSET # Used to cache calculated network cfg v1 # Whether we want to get network configuration from the metadata service. perform_dhcp_setup = False def __init__(self, sys_cfg, distro, paths): super(DataSourceOpenStack, self).__init__(sys_cfg, distro, paths) self.metadata_address = None self.ssl_details = util.fetch_ssl_details(self.paths) self.version = None self.files = {} self.ec2_metadata = sources.UNSET self.network_json = sources.UNSET def __str__(self): root = sources.DataSource.__str__(self) mstr = "%s [%s,ver=%s]" % (root, self.dsmode, self.version) return mstr def wait_for_metadata_service(self): urls = self.ds_cfg.get("metadata_urls", [DEF_MD_URL]) filtered = [x for x in urls if util.is_resolvable_url(x)] if set(filtered) != set(urls): LOG.debug("Removed the following from metadata urls: %s", list((set(urls) - set(filtered)))) if len(filtered): urls = filtered else: LOG.warning("Empty metadata url list! using default list") urls = [DEF_MD_URL] md_urls = [] url2base = {} for url in urls: md_url = url_helper.combine_url(url, 'openstack') md_urls.append(md_url) url2base[md_url] = url url_params = self.get_url_params() start_time = time.time() avail_url, _response = url_helper.wait_for_url( urls=md_urls, max_wait=url_params.max_wait_seconds, timeout=url_params.timeout_seconds) if avail_url: LOG.debug("Using metadata source: '%s'", url2base[avail_url]) else: LOG.debug("Giving up on OpenStack md from %s after %s seconds", md_urls, int(time.time() - start_time)) self.metadata_address = url2base.get(avail_url) return bool(avail_url) def check_instance_id(self, sys_cfg): # quickly (local check only) if self.instance_id is still valid return sources.instance_id_matches_system_uuid(self.get_instance_id()) @property def network_config(self): """Return a network config dict for rendering ENI or netplan files.""" if self._network_config != sources.UNSET: return self._network_config # RELEASE_BLOCKER: SRU to Xenial and Artful SRU should not provide # network_config by default unless configured in /etc/cloud/cloud.cfg*. # Patch Xenial and Artful before release to default to False. if util.is_false(self.ds_cfg.get('apply_network_config', True)): self._network_config = None return self._network_config if self.network_json == sources.UNSET: # this would happen if get_data hadn't been called. leave as UNSET LOG.warning( 'Unexpected call to network_config when network_json is None.') return None LOG.debug('network config provided via network_json') self._network_config = openstack.convert_net_json( self.network_json, known_macs=None) return self._network_config def _get_data(self): """Crawl metadata, parse and persist that data for this instance. @return: True when metadata discovered indicates OpenStack datasource. False when unable to contact metadata service or when metadata format is invalid or disabled. """ oracle_considered = 'Oracle' in self.sys_cfg.get('datasource_list') if not detect_openstack(accept_oracle=not oracle_considered): return False if self.perform_dhcp_setup: # Setup networking in init-local stage. try: with EphemeralDHCPv4(self.fallback_interface): results = util.log_time( logfunc=LOG.debug, msg='Crawl of metadata service', func=self._crawl_metadata) except (NoDHCPLeaseError, sources.InvalidMetaDataException) as e: util.logexc(LOG, str(e)) return False else: try: results = self._crawl_metadata() except sources.InvalidMetaDataException as e: util.logexc(LOG, str(e)) return False self.dsmode = self._determine_dsmode([results.get('dsmode')]) if self.dsmode == sources.DSMODE_DISABLED: return False md = results.get('metadata', {}) md = util.mergemanydict([md, DEFAULT_METADATA]) self.metadata = md self.ec2_metadata = results.get('ec2-metadata') self.network_json = results.get('networkdata') self.userdata_raw = results.get('userdata') self.version = results['version'] self.files.update(results.get('files', {})) vd = results.get('vendordata') self.vendordata_pure = vd try: self.vendordata_raw = sources.convert_vendordata(vd) except ValueError as e: LOG.warning("Invalid content in vendor-data: %s", e) self.vendordata_raw = None return True def _crawl_metadata(self): """Crawl metadata service when available. @returns: Dictionary with all metadata discovered for this datasource. @raise: InvalidMetaDataException on unreadable or broken metadata. """ try: if not self.wait_for_metadata_service(): raise sources.InvalidMetaDataException( 'No active metadata service found') except IOError as e: raise sources.InvalidMetaDataException( 'IOError contacting metadata service: {error}'.format( error=str(e))) url_params = self.get_url_params() try: result = util.log_time( LOG.debug, 'Crawl of openstack metadata service', read_metadata_service, args=[self.metadata_address], kwargs={'ssl_details': self.ssl_details, 'retries': url_params.num_retries, 'timeout': url_params.timeout_seconds}) except openstack.NonReadable as e: raise sources.InvalidMetaDataException(str(e)) except (openstack.BrokenMetadata, IOError): msg = 'Broken metadata address {addr}'.format( addr=self.metadata_address) raise sources.InvalidMetaDataException(msg) return result class DataSourceOpenStackLocal(DataSourceOpenStack): """Run in init-local using a dhcp discovery prior to metadata crawl. In init-local, no network is available. This subclass sets up minimal networking with dhclient on a viable nic so that it can talk to the metadata service. If the metadata service provides network configuration then render the network configuration for that instance based on metadata. """ perform_dhcp_setup = True # Get metadata network config if present def read_metadata_service(base_url, ssl_details=None, timeout=5, retries=5): reader = openstack.MetadataReader(base_url, ssl_details=ssl_details, timeout=timeout, retries=retries) return reader.read_v2() def detect_openstack(accept_oracle=False): """Return True when a potential OpenStack platform is detected.""" if not util.is_x86(): return True # Non-Intel cpus don't properly report dmi product names product_name = util.read_dmi_data('system-product-name') if product_name in VALID_DMI_PRODUCT_NAMES: return True elif util.read_dmi_data('chassis-asset-tag') in VALID_DMI_ASSET_TAGS: return True elif accept_oracle and oracle._is_platform_viable(): return True elif util.get_proc_env(1).get('product_name') == DMI_PRODUCT_NOVA: return True return False # Used to match classes to dependencies datasources = [ (DataSourceOpenStackLocal, (sources.DEP_FILESYSTEM,)), (DataSourceOpenStack, (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) # vi: ts=4 expandtab Submit