# Copyright 2010 United States Government as represented by the # Administrator of the National Aeronautics and Space Administration. # All Rights Reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); you may # not use this file except in compliance with the License. You may obtain # a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the # License for the specific language governing permissions and limitations # under the License. """Instance Metadata information.""" import base64 import json import os import posixpath from oslo.config import cfg from nova.api.ec2 import ec2utils from nova.api.metadata import password from nova import block_device from nova.compute import flavors from nova import conductor from nova import context from nova import network from nova import objects from nova.objects import base as obj_base from nova.objects import security_group as secgroup_obj from nova.openstack.common import importutils from nova.openstack.common import log as logging from nova.openstack.common import timeutils from nova import utils from nova.virt import netutils metadata_opts = [ cfg.StrOpt('config_drive_skip_versions', default=('1.0 2007-01-19 2007-03-01 2007-08-29 2007-10-10 ' '2007-12-15 2008-02-01 2008-09-01'), help=('List of metadata versions to skip placing into the ' 'config drive')), cfg.StrOpt('vendordata_driver', default='nova.api.metadata.vendordata_json.JsonFileVendorData', help='Driver to use for vendor data'), ] CONF = cfg.CONF CONF.register_opts(metadata_opts) CONF.import_opt('dhcp_domain', 'nova.network.manager') VERSIONS = [ '1.0', '2007-01-19', '2007-03-01', '2007-08-29', '2007-10-10', '2007-12-15', '2008-02-01', '2008-09-01', '2009-04-04', ] FOLSOM = '2012-08-10' GRIZZLY = '2013-04-04' HAVANA = '2013-10-17' OPENSTACK_VERSIONS = [ FOLSOM, GRIZZLY, HAVANA, ] VERSION = "version" CONTENT = "content" CONTENT_DIR = "content" MD_JSON_NAME = "meta_data.json" VD_JSON_NAME = "vendor_data.json" UD_NAME = "user_data" PASS_NAME = "password" MIME_TYPE_TEXT_PLAIN = "text/plain" MIME_TYPE_APPLICATION_JSON = "application/json" LOG = logging.getLogger(__name__) class InvalidMetadataVersion(Exception): pass class InvalidMetadataPath(Exception): pass class InstanceMetadata(): """Instance metadata.""" def __init__(self, instance, address=None, content=None, extra_md=None, conductor_api=None, network_info=None, vd_driver=None): """Creation of this object should basically cover all time consuming collection. Methods after that should not cause time delays due to network operations or lengthy cpu operations. The user should then get a single instance and make multiple method calls on it. """ if not content: content = [] ctxt = context.get_admin_context() # NOTE(danms): This should be removed after bp:compute-manager-objects if not isinstance(instance, obj_base.NovaObject): expected = ['metadata', 'system_metadata'] if 'info_cache' in instance: expected.append('info_cache') instance = objects.Instance._from_db_object( ctxt, objects.Instance(), instance, expected_attrs=expected) # The default value of mimeType is set to MIME_TYPE_TEXT_PLAIN self.set_mimetype(MIME_TYPE_TEXT_PLAIN) self.instance = instance self.extra_md = extra_md if conductor_api: capi = conductor_api else: capi = conductor.API() self.availability_zone = ec2utils.get_availability_zone_by_host( instance['host'], capi) self.security_groups = secgroup_obj.SecurityGroupList.get_by_instance( ctxt, instance) self.mappings = _format_instance_mapping(ctxt, instance) if instance.get('user_data', None) is not None: self.userdata_raw = base64.b64decode(instance['user_data']) else: self.userdata_raw = None self.ec2_ids = capi.get_ec2_ids(ctxt, obj_base.obj_to_primitive(instance)) self.address = address # expose instance metadata. self.launch_metadata = utils.instance_meta(instance) self.password = password.extract_password(instance) self.uuid = instance.get('uuid') self.content = {} self.files = [] # get network info, and the rendered network template if network_info is None: network_info = instance.info_cache.network_info self.ip_info = \ ec2utils.get_ip_info_for_instance_from_nw_info(network_info) self.network_config = None cfg = netutils.get_injected_network_template(network_info) if cfg: key = "%04i" % len(self.content) self.content[key] = cfg self.network_config = {"name": "network_config", 'content_path': "/%s/%s" % (CONTENT_DIR, key)} # 'content' is passed in from the configdrive code in # nova/virt/libvirt/driver.py. That's how we get the injected files # (personalities) in. AFAIK they're not stored in the db at all, # so are not available later (web service metadata time). for (path, contents) in content: key = "%04i" % len(self.content) self.files.append({'path': path, 'content_path': "/%s/%s" % (CONTENT_DIR, key)}) self.content[key] = contents if vd_driver is None: vdclass = importutils.import_class(CONF.vendordata_driver) else: vdclass = vd_driver self.vddriver = vdclass(instance=instance, address=address, extra_md=extra_md, network_info=network_info) self.route_configuration = None def _route_configuration(self): if self.route_configuration: return self.route_configuration path_handlers = {UD_NAME: self._user_data, PASS_NAME: self._password, VD_JSON_NAME: self._vendor_data, MD_JSON_NAME: self._metadata_as_json, VERSION: self._handle_version, CONTENT: self._handle_content} self.route_configuration = RouteConfiguration(path_handlers) return self.route_configuration def set_mimetype(self, mime_type): self.md_mimetype = mime_type def get_mimetype(self): return self.md_mimetype def get_ec2_metadata(self, version): if version == "latest": version = VERSIONS[-1] if version not in VERSIONS: raise InvalidMetadataVersion(version) hostname = self._get_hostname() floating_ips = self.ip_info['floating_ips'] floating_ip = floating_ips and floating_ips[0] or '' fixed_ips = self.ip_info['fixed_ips'] fixed_ip = fixed_ips and fixed_ips[0] or '' fmt_sgroups = [x['name'] for x in self.security_groups] meta_data = { 'ami-id': self.ec2_ids['ami-id'], 'ami-launch-index': self.instance['launch_index'], 'ami-manifest-path': 'FIXME', 'instance-id': self.ec2_ids['instance-id'], 'hostname': hostname, 'local-ipv4': self.address or fixed_ip, 'reservation-id': self.instance['reservation_id'], 'security-groups': fmt_sgroups} # public keys are strangely rendered in ec2 metadata service # meta-data/public-keys/ returns '0=keyname' (with no trailing /) # and only if there is a public key given. # '0=keyname' means there is a normally rendered dict at # meta-data/public-keys/0 # # meta-data/public-keys/ : '0=%s' % keyname # meta-data/public-keys/0/ : 'openssh-key' # meta-data/public-keys/0/openssh-key : '%s' % publickey if self.instance['key_name']: meta_data['public-keys'] = { '0': {'_name': "0=" + self.instance['key_name'], 'openssh-key': self.instance['key_data']}} if self._check_version('2007-01-19', version): meta_data['local-hostname'] = hostname meta_data['public-hostname'] = hostname meta_data['public-ipv4'] = floating_ip if False and self._check_version('2007-03-01', version): # TODO(vish): store product codes meta_data['product-codes'] = [] if self._check_version('2007-08-29', version): instance_type = flavors.extract_flavor(self.instance) meta_data['instance-type'] = instance_type['name'] if False and self._check_version('2007-10-10', version): # TODO(vish): store ancestor ids meta_data['ancestor-ami-ids'] = [] if self._check_version('2007-12-15', version): meta_data['block-device-mapping'] = self.mappings if 'kernel-id' in self.ec2_ids: meta_data['kernel-id'] = self.ec2_ids['kernel-id'] if 'ramdisk-id' in self.ec2_ids: meta_data['ramdisk-id'] = self.ec2_ids['ramdisk-id'] if self._check_version('2008-02-01', version): meta_data['placement'] = {'availability-zone': self.availability_zone} if self._check_version('2008-09-01', version): meta_data['instance-action'] = 'none' data = {'meta-data': meta_data} if self.userdata_raw is not None: data['user-data'] = self.userdata_raw return data def get_ec2_item(self, path_tokens): # get_ec2_metadata returns dict without top level version data = self.get_ec2_metadata(path_tokens[0]) return find_path_in_tree(data, path_tokens[1:]) def get_openstack_item(self, path_tokens): if path_tokens[0] == CONTENT_DIR: return self._handle_content(path_tokens) return self._route_configuration().handle_path(path_tokens) def _metadata_as_json(self, version, path): metadata = {'uuid': self.uuid} if self.launch_metadata: metadata['meta'] = self.launch_metadata if self.files: metadata['files'] = self.files if self.extra_md: metadata.update(self.extra_md) if self.network_config: metadata['network_config'] = self.network_config if self.instance['key_name']: metadata['public_keys'] = { self.instance['key_name']: self.instance['key_data'] } metadata['hostname'] = self._get_hostname() metadata['name'] = self.instance['display_name'] metadata['launch_index'] = self.instance['launch_index'] metadata['availability_zone'] = self.availability_zone if self._check_os_version(GRIZZLY, version): metadata['random_seed'] = base64.b64encode(os.urandom(512)) self.set_mimetype(MIME_TYPE_APPLICATION_JSON) return json.dumps(metadata) def _handle_content(self, path_tokens): if len(path_tokens) == 1: raise KeyError("no listing for %s" % "/".join(path_tokens)) if len(path_tokens) != 2: raise KeyError("Too many tokens for /%s" % CONTENT_DIR) return self.content[path_tokens[1]] def _handle_version(self, version, path): # request for /version, give a list of what is available ret = [MD_JSON_NAME] if self.userdata_raw is not None: ret.append(UD_NAME) if self._check_os_version(GRIZZLY, version): ret.append(PASS_NAME) if self._check_os_version(HAVANA, version): ret.append(VD_JSON_NAME) return ret def _user_data(self, version, path): if self.userdata_raw is None: raise KeyError(path) return self.userdata_raw def _password(self, version, path): if self._check_os_version(GRIZZLY, version): return password.handle_password raise KeyError(path) def _vendor_data(self, version, path): if self._check_os_version(HAVANA, version): self.set_mimetype(MIME_TYPE_APPLICATION_JSON) return json.dumps(self.vddriver.get()) raise KeyError(path) def _check_version(self, required, requested, versions=VERSIONS): return versions.index(requested) >= versions.index(required) def _check_os_version(self, required, requested): return self._check_version(required, requested, OPENSTACK_VERSIONS) def _get_hostname(self): return "%s%s%s" % (self.instance['hostname'], '.' if CONF.dhcp_domain else '', CONF.dhcp_domain) def lookup(self, path): if path == "" or path[0] != "/": path = posixpath.normpath("/" + path) else: path = posixpath.normpath(path) # Set default mimeType. It will be modified only if there is a change self.set_mimetype(MIME_TYPE_TEXT_PLAIN) # fix up requests, prepending /ec2 to anything that does not match path_tokens = path.split('/')[1:] if path_tokens[0] not in ("ec2", "openstack"): if path_tokens[0] == "": # request for / path_tokens = ["ec2"] else: path_tokens = ["ec2"] + path_tokens path = "/" + "/".join(path_tokens) # all values of 'path' input starts with '/' and have no trailing / # specifically handle the top level request if len(path_tokens) == 1: if path_tokens[0] == "openstack": # NOTE(vish): don't show versions that are in the future today = timeutils.utcnow().strftime("%Y-%m-%d") versions = [v for v in OPENSTACK_VERSIONS if v <= today] if OPENSTACK_VERSIONS != versions: LOG.debug("future versions %s hidden in version list", [v for v in OPENSTACK_VERSIONS if v not in versions]) versions += ["latest"] else: versions = VERSIONS + ["latest"] return versions try: if path_tokens[0] == "openstack": data = self.get_openstack_item(path_tokens[1:]) else: data = self.get_ec2_item(path_tokens[1:]) except (InvalidMetadataVersion, KeyError): raise InvalidMetadataPath(path) return data def metadata_for_config_drive(self): """Yields (path, value) tuples for metadata elements.""" # EC2 style metadata for version in VERSIONS + ["latest"]: if version in CONF.config_drive_skip_versions.split(' '): continue data = self.get_ec2_metadata(version) if 'user-data' in data: filepath = os.path.join('ec2', version, 'user-data') yield (filepath, data['user-data']) del data['user-data'] try: del data['public-keys']['0']['_name'] except KeyError: pass filepath = os.path.join('ec2', version, 'meta-data.json') yield (filepath, json.dumps(data['meta-data'])) ALL_OPENSTACK_VERSIONS = OPENSTACK_VERSIONS + ["latest"] for version in ALL_OPENSTACK_VERSIONS: path = 'openstack/%s/%s' % (version, MD_JSON_NAME) yield (path, self.lookup(path)) path = 'openstack/%s/%s' % (version, UD_NAME) if self.userdata_raw is not None: yield (path, self.lookup(path)) if self._check_version(HAVANA, version, ALL_OPENSTACK_VERSIONS): path = 'openstack/%s/%s' % (version, VD_JSON_NAME) yield (path, self.lookup(path)) for (cid, content) in self.content.iteritems(): yield ('%s/%s/%s' % ("openstack", CONTENT_DIR, cid), content) class RouteConfiguration(object): """Routes metadata paths to request handlers.""" def __init__(self, path_handler): self.path_handlers = path_handler def _version(self, version): if version == "latest": version = OPENSTACK_VERSIONS[-1] if version not in OPENSTACK_VERSIONS: raise InvalidMetadataVersion(version) return version def handle_path(self, path_tokens): version = self._version(path_tokens[0]) if len(path_tokens) == 1: path = VERSION else: path = '/'.join(path_tokens[1:]) path_handler = self.path_handlers[path] if path_handler is None: raise KeyError(path) return path_handler(version, path) class VendorDataDriver(object): """The base VendorData Drivers should inherit from.""" def __init__(self, *args, **kwargs): """Init method should do all expensive operations.""" self._data = {} def get(self): """Return a dictionary of primitives to be rendered in metadata :return: A dictionary or primitives. """ return self._data def get_metadata_by_address(conductor_api, address): ctxt = context.get_admin_context() fixed_ip = network.API().get_fixed_ip_by_address(ctxt, address) return get_metadata_by_instance_id(conductor_api, fixed_ip['instance_uuid'], address, ctxt) def get_metadata_by_instance_id(conductor_api, instance_id, address, ctxt=None): ctxt = ctxt or context.get_admin_context() instance = objects.Instance.get_by_uuid(ctxt, instance_id) return InstanceMetadata(instance, address) def _format_instance_mapping(ctxt, instance): bdms = objects.BlockDeviceMappingList.get_by_instance_uuid( ctxt, instance.uuid) return block_device.instance_block_mapping(instance, bdms) def ec2_md_print(data): if isinstance(data, dict): output = '' for key in sorted(data.keys()): if key == '_name': continue if isinstance(data[key], dict): if '_name' in data[key]: output += str(data[key]['_name']) else: output += key + '/' else: output += key output += '\n' return output[:-1] elif isinstance(data, list): return '\n'.join(data) else: return str(data) def find_path_in_tree(data, path_tokens): # given a dict/list tree, and a path in that tree, return data found there. for i in range(0, len(path_tokens)): if isinstance(data, dict) or isinstance(data, list): if path_tokens[i] in data: data = data[path_tokens[i]] else: raise KeyError("/".join(path_tokens[0:i])) else: if i != len(path_tokens) - 1: raise KeyError("/".join(path_tokens[0:i])) data = data[path_tokens[i]] return data