Gestionnaire de fichiers - Editer - /usr/lib/python2.7/site-packages/cloudinit/sources/DataSourceNoCloud.py
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# Copyright (C) 2009-2010 Canonical Ltd. # Copyright (C) 2012, 2013 Hewlett-Packard Development Company, L.P. # Copyright (C) 2012 Yahoo! Inc. # # Author: Scott Moser <scott.moser@canonical.com> # Author: Juerg Hafliger <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 errno import os from cloudinit import log as logging from cloudinit.net import eni from cloudinit import sources from cloudinit import util LOG = logging.getLogger(__name__) class DataSourceNoCloud(sources.DataSource): dsname = "NoCloud" def __init__(self, sys_cfg, distro, paths): sources.DataSource.__init__(self, sys_cfg, distro, paths) self.seed = None self.seed_dirs = [os.path.join(paths.seed_dir, 'nocloud'), os.path.join(paths.seed_dir, 'nocloud-net')] self.seed_dir = None self.supported_seed_starts = ("/", "file://") def __str__(self): root = sources.DataSource.__str__(self) return "%s [seed=%s][dsmode=%s]" % (root, self.seed, self.dsmode) def _get_devices(self, label): if util.is_FreeBSD(): devlist = [ p for p in ['/dev/msdosfs/' + label, '/dev/iso9660/' + label] if os.path.exists(p)] else: # Query optical drive to get it in blkid cache for 2.6 kernels util.find_devs_with(path="/dev/sr0") util.find_devs_with(path="/dev/sr1") fslist = util.find_devs_with("TYPE=vfat") fslist.extend(util.find_devs_with("TYPE=iso9660")) label_list = util.find_devs_with("LABEL=%s" % label.upper()) label_list.extend(util.find_devs_with("LABEL=%s" % label.lower())) devlist = list(set(fslist) & set(label_list)) devlist.sort(reverse=True) return devlist def _get_data(self): defaults = { "instance-id": "nocloud", "dsmode": self.dsmode, } found = [] mydata = {'meta-data': {}, 'user-data': "", 'vendor-data': "", 'network-config': None} try: # Parse the system serial label from dmi. If not empty, try parsing # like the commandline md = {} serial = util.read_dmi_data('system-serial-number') if serial and load_cmdline_data(md, serial): found.append("dmi") mydata = _merge_new_seed(mydata, {'meta-data': md}) except Exception: util.logexc(LOG, "Unable to parse dmi data") return False try: # Parse the kernel command line, getting data passed in md = {} if load_cmdline_data(md): found.append("cmdline") mydata = _merge_new_seed(mydata, {'meta-data': md}) except Exception: util.logexc(LOG, "Unable to parse command line data") return False # Check to see if the seed dir has data. pp2d_kwargs = {'required': ['user-data', 'meta-data'], 'optional': ['vendor-data', 'network-config']} for path in self.seed_dirs: try: seeded = util.pathprefix2dict(path, **pp2d_kwargs) found.append(path) LOG.debug("Using seeded data from %s", path) mydata = _merge_new_seed(mydata, seeded) break except ValueError: pass # If the datasource config had a 'seedfrom' entry, then that takes # precedence over a 'seedfrom' that was found in a filesystem # but not over external media if self.ds_cfg.get('seedfrom'): found.append("ds_config_seedfrom") mydata['meta-data']["seedfrom"] = self.ds_cfg['seedfrom'] # fields appropriately named can also just come from the datasource # config (ie, 'user-data', 'meta-data', 'vendor-data' there) if 'user-data' in self.ds_cfg and 'meta-data' in self.ds_cfg: mydata = _merge_new_seed(mydata, self.ds_cfg) found.append("ds_config") def _pp2d_callback(mp, data): return util.pathprefix2dict(mp, **data) label = self.ds_cfg.get('fs_label', "cidata") if label is not None: for dev in self._get_devices(label): try: LOG.debug("Attempting to use data from %s", dev) try: seeded = util.mount_cb(dev, _pp2d_callback, pp2d_kwargs) except ValueError: LOG.warning("device %s with label=%s not a " "valid seed.", dev, label) continue mydata = _merge_new_seed(mydata, seeded) LOG.debug("Using data from %s", dev) found.append(dev) break except OSError as e: if e.errno != errno.ENOENT: raise except util.MountFailedError: util.logexc(LOG, "Failed to mount %s when looking for " "data", dev) # There was no indication on kernel cmdline or data # in the seeddir suggesting this handler should be used. if len(found) == 0: return False # The special argument "seedfrom" indicates we should # attempt to seed the userdata / metadata from its value # its primarily value is in allowing the user to type less # on the command line, ie: ds=nocloud;s=http://bit.ly/abcdefg if "seedfrom" in mydata['meta-data']: seedfrom = mydata['meta-data']["seedfrom"] seedfound = False for proto in self.supported_seed_starts: if seedfrom.startswith(proto): seedfound = proto break if not seedfound: LOG.debug("Seed from %s not supported by %s", seedfrom, self) return False # This could throw errors, but the user told us to do it # so if errors are raised, let them raise (md_seed, ud) = util.read_seeded(seedfrom, timeout=None) LOG.debug("Using seeded cache data from %s", seedfrom) # Values in the command line override those from the seed mydata['meta-data'] = util.mergemanydict([mydata['meta-data'], md_seed]) mydata['user-data'] = ud found.append(seedfrom) # Now that we have exhausted any other places merge in the defaults mydata['meta-data'] = util.mergemanydict([mydata['meta-data'], defaults]) self.dsmode = self._determine_dsmode( [mydata['meta-data'].get('dsmode')]) if self.dsmode == sources.DSMODE_DISABLED: LOG.debug("%s: not claiming datasource, dsmode=%s", self, self.dsmode) return False self.seed = ",".join(found) self.metadata = mydata['meta-data'] self.userdata_raw = mydata['user-data'] self.vendordata_raw = mydata['vendor-data'] self._network_config = mydata['network-config'] self._network_eni = mydata['meta-data'].get('network-interfaces') return True @property def platform_type(self): # Handle upgrade path of pickled ds if not hasattr(self, '_platform_type'): self._platform_type = None if not self._platform_type: self._platform_type = 'lxd' if util.is_lxd() else 'nocloud' return self._platform_type def _get_cloud_name(self): """Return unknown when 'cloud-name' key is absent from metadata.""" return sources.METADATA_UNKNOWN def _get_subplatform(self): """Return the subplatform metadata source details.""" if self.seed.startswith('/dev'): subplatform_type = 'config-disk' else: subplatform_type = 'seed-dir' return '%s (%s)' % (subplatform_type, self.seed) def check_instance_id(self, sys_cfg): # quickly (local check only) if self.instance_id is still valid # we check kernel command line or files. current = self.get_instance_id() if not current: return None # LP: #1568150 need getattr in the case that an old class object # has been loaded from a pickled file and now executing new source. dirs = getattr(self, 'seed_dirs', [self.seed_dir]) quick_id = _quick_read_instance_id(dirs=dirs) if not quick_id: return None return quick_id == current @property def network_config(self): if self._network_config is None: if self._network_eni is not None: self._network_config = eni.convert_eni_data(self._network_eni) return self._network_config def _quick_read_instance_id(dirs=None): if dirs is None: dirs = [] iid_key = 'instance-id' fill = {} if load_cmdline_data(fill) and iid_key in fill: return fill[iid_key] for d in dirs: if d is None: continue try: data = util.pathprefix2dict(d, required=['meta-data']) md = util.load_yaml(data['meta-data']) if iid_key in md: return md[iid_key] except ValueError: pass return None def load_cmdline_data(fill, cmdline=None): pairs = [("ds=nocloud", sources.DSMODE_LOCAL), ("ds=nocloud-net", sources.DSMODE_NETWORK)] for idstr, dsmode in pairs: if parse_cmdline_data(idstr, fill, cmdline): # if dsmode was explicitly in the command line, then # prefer it to the dsmode based on the command line id if 'dsmode' not in fill: fill['dsmode'] = dsmode return True return False # Returns true or false indicating if cmdline indicated # that this module should be used. Updates dictionary 'fill' # with data that was found. # Example cmdline: # root=LABEL=uec-rootfs ro ds=nocloud def parse_cmdline_data(ds_id, fill, cmdline=None): if cmdline is None: cmdline = util.get_cmdline() cmdline = " %s " % cmdline if not (" %s " % ds_id in cmdline or " %s;" % ds_id in cmdline): return False argline = "" # cmdline can contain: # ds=nocloud[;key=val;key=val] for tok in cmdline.split(): if tok.startswith(ds_id): argline = tok.split("=", 1) # argline array is now 'nocloud' followed optionally by # a ';' and then key=value pairs also terminated with ';' tmp = argline[1].split(";") if len(tmp) > 1: kvpairs = tmp[1:] else: kvpairs = () # short2long mapping to save cmdline typing s2l = {"h": "local-hostname", "i": "instance-id", "s": "seedfrom"} for item in kvpairs: if item == "": continue try: (k, v) = item.split("=", 1) except Exception: k = item v = None if k in s2l: k = s2l[k] fill[k] = v return True def _maybe_remove_top_network(cfg): """If network-config contains top level 'network' key, then remove it. Some providers of network configuration may provide a top level 'network' key (LP: #1798117) even though it is not necessary. Be friendly and remove it if it really seems so. Return the original value if no change or the updated value if changed.""" nullval = object() network_val = cfg.get('network', nullval) if network_val is nullval: return cfg bmsg = 'Top level network key in network-config %s: %s' if not isinstance(network_val, dict): LOG.debug(bmsg, "was not a dict", cfg) return cfg if len(list(cfg.keys())) != 1: LOG.debug(bmsg, "had multiple top level keys", cfg) return cfg if network_val.get('config') == "disabled": LOG.debug(bmsg, "was config/disabled", cfg) elif not all(('config' in network_val, 'version' in network_val)): LOG.debug(bmsg, "but missing 'config' or 'version'", cfg) return cfg LOG.debug(bmsg, "fixed by removing shifting network.", cfg) return network_val def _merge_new_seed(cur, seeded): ret = cur.copy() newmd = seeded.get('meta-data', {}) if not isinstance(seeded['meta-data'], dict): newmd = util.load_yaml(seeded['meta-data']) ret['meta-data'] = util.mergemanydict([cur['meta-data'], newmd]) if seeded.get('network-config'): ret['network-config'] = _maybe_remove_top_network( util.load_yaml(seeded.get('network-config'))) if 'user-data' in seeded: ret['user-data'] = seeded['user-data'] if 'vendor-data' in seeded: ret['vendor-data'] = seeded['vendor-data'] return ret class DataSourceNoCloudNet(DataSourceNoCloud): def __init__(self, sys_cfg, distro, paths): DataSourceNoCloud.__init__(self, sys_cfg, distro, paths) self.supported_seed_starts = ("http://", "https://", "ftp://") # Used to match classes to dependencies datasources = [ (DataSourceNoCloud, (sources.DEP_FILESYSTEM, )), (DataSourceNoCloudNet, (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
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