91 lines
2.6 KiB
Python
Executable File
91 lines
2.6 KiB
Python
Executable File
# -*- coding: utf-8 -*-
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# Copyright 2011 Justin Santa Barbara
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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Driver base-classes:
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(Beginning of) the contract that deployment backends drivers must follow,
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and shared types that support that contract
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"""
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from oslo_log import log as logging
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from oslo_utils import importutils
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from daisy import i18n
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_ = i18n._
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_LE = i18n._LE
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_LI = i18n._LI
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_LW = i18n._LW
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LOG = logging.getLogger(__name__)
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class DeploymentDriver(object):
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"""base class for deployment interface.
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"""
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def install(self, req, cluster_id):
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raise NotImplementedError()
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def upgrade(self, req, cluster_id):
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raise NotImplementedError()
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def uninstall(self, req, cluster_id):
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raise NotImplementedError()
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def uninstall_progress(self, req, cluster_id):
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LOG.info(_("driver no interface for 'uninstall_progress'"))
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return {}
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def upgrade_progress(self, req, cluster_id):
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LOG.info(_("driver no interface for 'upgrade_progress'"))
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return {}
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def exprot_db(self, req, cluster_id):
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LOG.info(_("driver no interface for 'exprot_db'"))
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return {}
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def update_disk_array(self, req, cluster_id):
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LOG.info(_("driver no interface for 'update_disk_array'"))
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return {}
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def check_isinstance(obj, cls):
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"""Checks that obj is of type cls, and lets PyLint infer types."""
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if isinstance(obj, cls):
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return obj
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raise Exception(_('Expected object of type: %s') % (str(cls)))
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def load_deployment_dirver(backend_name):
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"""Load a cluster backend installation driver.
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"""
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backend_driver = "%s.api.API" % backend_name
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LOG.info(_("Loading deployment backend '%s'") % backend_driver)
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try:
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driver = importutils.import_object_ns(
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'daisy.api.backends', backend_driver)
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return check_isinstance(driver, DeploymentDriver)
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except ImportError:
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LOG.exception(
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_("Error, unable to load the deployment backends '%s'"
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% backend_driver))
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return None
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