228 lines
7.8 KiB
Python
228 lines
7.8 KiB
Python
# Copyright (c) 2014 Mirantis Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import abc
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import os
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import shutil
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import tempfile
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import uuid
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from keystoneclient.v2_0 import client as keystoneclient
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from muranoclient.common import exceptions as muranoclient_exc
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from muranoclient.v1 import client as muranoclient
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import six
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import yaml
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from murano.common import config
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from murano.dsl import exceptions
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from murano.dsl import yaql_expression
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from murano.openstack.common import log as logging
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from murano.packages import application_package as app_pkg
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from murano.packages import exceptions as pkg_exc
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LOG = logging.getLogger(__name__)
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class YaqlYamlLoader(yaml.Loader):
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pass
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def yaql_constructor(loader, node):
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value = loader.construct_scalar(node)
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return yaql_expression.YaqlExpression(value)
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yaml.add_constructor(u'!yaql', yaql_constructor, YaqlYamlLoader)
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yaml.add_implicit_resolver(u'!yaql', yaql_expression.YaqlExpression,
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Loader=YaqlYamlLoader)
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class PackageLoader(six.with_metaclass(abc.ABCMeta)):
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@abc.abstractmethod
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def get_package(self, name):
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pass
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@abc.abstractmethod
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def get_package_by_class(self, name):
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pass
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class ApiPackageLoader(PackageLoader):
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def __init__(self, token_id, tenant_id):
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self._cache_directory = self._get_cache_directory()
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self._client = self._get_murano_client(token_id, tenant_id)
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def get_package_by_class(self, name):
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filter_opts = {'class_name': name, 'limit': 1}
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try:
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package_definition = self._get_definition(filter_opts)
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return self._get_package_by_definition(package_definition)
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except(LookupError, pkg_exc.PackageLoadError):
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raise exceptions.NoPackageForClassFound(name)
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def get_package(self, name):
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filter_opts = {'fqn': name, 'limit': 1}
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try:
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package_definition = self._get_definition(filter_opts)
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return self._get_package_by_definition(package_definition)
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except(LookupError, pkg_exc.PackageLoadError):
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raise exceptions.NoPackageFound(name)
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@staticmethod
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def _get_cache_directory():
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directory = os.path.join(config.CONF.packages_opts.packages_cache,
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str(uuid.uuid4()))
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directory = os.path.abspath(directory)
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os.makedirs(directory)
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LOG.debug('Cache for package loader is located at: '
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'{0}'.format(directory))
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return directory
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@staticmethod
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def _get_murano_client(token_id, tenant_id):
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murano_settings = config.CONF.murano
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endpoint_url = murano_settings.url
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if endpoint_url is None:
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keystone_settings = config.CONF.keystone
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keystone_client = keystoneclient.Client(
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endpoint=keystone_settings.auth_url,
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cacert=keystone_settings.ca_file or None,
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cert=keystone_settings.cert_file or None,
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key=keystone_settings.key_file or None,
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insecure=keystone_settings.insecure
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)
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if not keystone_client.authenticate(
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auth_url=keystone_settings.auth_url,
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tenant_id=tenant_id,
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token=token_id):
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raise muranoclient_exc.HTTPUnauthorized()
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endpoint_url = keystone_client.service_catalog.url_for(
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service_type='application_catalog',
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endpoint_type=murano_settings.endpoint_type
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)
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return muranoclient.Client(
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endpoint=endpoint_url,
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key_file=murano_settings.key_file or None,
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cacert=murano_settings.cacert or None,
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cert_file=murano_settings.cert_file or None,
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insecure=murano_settings.insecure,
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token=token_id
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)
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def _get_definition(self, filter_opts):
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try:
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packages = self._client.packages.filter(**filter_opts)
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try:
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return packages.next()
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except StopIteration:
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LOG.debug('There are no packages matching filter '
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'{0}'.format(filter_opts))
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# TODO(smelikyan): This exception should be replaced with one
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# defined in python-muranoclient
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raise LookupError()
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except muranoclient_exc.HTTPException:
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LOG.debug('Failed to get package definition from repository')
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raise LookupError()
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def _get_package_by_definition(self, package_def):
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package_id = package_def.id
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package_name = package_def.fully_qualified_name
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package_directory = os.path.join(self._cache_directory, package_name)
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if os.path.exists(package_directory):
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try:
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return app_pkg.load_from_dir(package_directory, preload=True,
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loader=YaqlYamlLoader)
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except pkg_exc.PackageLoadError:
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LOG.exception('Unable to load package from cache. Clean-up...')
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shutil.rmtree(package_directory, ignore_errors=True)
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try:
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package_data = self._client.packages.download(package_id)
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except muranoclient_exc.HTTPException:
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LOG.exception('Unable to download '
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'package with id {0}'.format(package_id))
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raise pkg_exc.PackageLoadError()
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try:
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with tempfile.NamedTemporaryFile(delete=False) as package_file:
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package_file.write(package_data)
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return app_pkg.load_from_file(
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package_file.name,
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target_dir=package_directory,
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drop_dir=False,
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loader=YaqlYamlLoader
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)
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except IOError:
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LOG.exception('Unable to write package file')
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raise pkg_exc.PackageLoadError()
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finally:
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try:
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os.remove(package_file.name)
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except OSError:
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pass
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def cleanup(self):
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shutil.rmtree(self._cache_directory, ignore_errors=True)
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def __enter__(self):
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return self
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def __exit__(self, exc_type, exc_val, exc_tb):
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self.cleanup()
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return False
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class DirectoryPackageLoader(PackageLoader):
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def __init__(self, base_path):
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self._base_path = base_path
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self._processed_entries = set()
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self._packages_by_class = {}
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self._packages_by_name = {}
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self._build_index()
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def get_package(self, name):
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return self._packages_by_name.get(name)
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def get_package_by_class(self, name):
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return self._packages_by_class.get(name)
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def _build_index(self):
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for entry in os.listdir(self._base_path):
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folder = os.path.join(self._base_path, entry)
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if not os.path.isdir(folder) or entry in self._processed_entries:
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continue
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try:
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package = app_pkg.load_from_dir(folder, preload=True,
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loader=YaqlYamlLoader)
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except pkg_exc.PackageLoadError:
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LOG.exception('Unable to load package from path: '
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'{0}'.format(entry))
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continue
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for c in package.classes:
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self._packages_by_class[c] = package
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self._packages_by_name[package.full_name] = package
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self._processed_entries.add(entry)
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