deb-sahara/sahara/main.py
Adrien Vergé f2746a9a5a Support Cinder API version 2
Add support for the second version of the Cinder API, which brings
useful improvements and will soon replace version one.

Add a new 'cinder_api_version' option in sahara.conf.

Implements: blueprint support-cinder-api-v2
Change-Id: I57eddf3cf59e8b6b087e2ff9bfcd002175d3b1f9
2014-10-03 11:13:38 +02:00

190 lines
5.4 KiB
Python

# Copyright (c) 2013 Mirantis Inc.
#
# 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.
import os
import flask
from oslo.config import cfg
import six
import stevedore
from werkzeug import exceptions as werkzeug_exceptions
from sahara.api import acl
from sahara.api.middleware import auth_valid
from sahara.api.middleware import log_exchange
from sahara.api import v10 as api_v10
from sahara.api import v11 as api_v11
from sahara import config
from sahara import context
from sahara.i18n import _LI
from sahara.i18n import _LW
from sahara.openstack.common import log
from sahara.plugins import base as plugins_base
from sahara.service import api as service_api
from sahara.service.edp import api as edp_api
from sahara.service import ops as service_ops
from sahara.service import periodic
from sahara.utils import api as api_utils
from sahara.utils.openstack import cinder
from sahara.utils import remote
from sahara.utils import rpc as messaging
LOG = log.getLogger(__name__)
opts = [
cfg.StrOpt('os_region_name',
help='Region name used to get services endpoints.'),
cfg.StrOpt('infrastructure_engine',
default='direct',
help='An engine which will be used to provision '
'infrastructure for Hadoop cluster.'),
cfg.StrOpt('remote',
default='ssh',
help='A method for Sahara to execute commands '
'on VMs.')
]
CONF = cfg.CONF
CONF.register_opts(opts)
def setup_common(possible_topdir, service_name):
dev_conf = os.path.join(possible_topdir,
'etc',
'sahara',
'sahara.conf')
config_files = None
if os.path.exists(dev_conf):
config_files = [dev_conf]
config.parse_configs(config_files)
log.setup("sahara")
LOG.info(_LI('Starting Sahara %s'), service_name)
# Validate other configurations (that may produce logs) here
cinder.validate_config()
messaging.setup()
if service_name != 'all-in-one':
LOG.warn(
_LW("Distributed mode is in the alpha state, it's recommended to "
"use all-in-one mode by running 'sahara-all' binary."))
plugins_base.setup_plugins()
def setup_sahara_api(mode):
ops = _get_ops_driver(mode)
service_api.setup_service_api(ops)
edp_api.setup_edp_api(ops)
def setup_sahara_engine():
periodic.setup()
engine = _get_infrastructure_engine()
service_ops.setup_ops(engine)
remote_driver = _get_remote_driver()
remote.setup_remote(remote_driver, engine)
def make_app():
"""App builder (wsgi)
Entry point for Sahara REST API server
"""
app = flask.Flask('sahara.api')
@app.route('/', methods=['GET'])
def version_list():
context.set_ctx(None)
return api_utils.render({
"versions": [
{"id": "v1.0", "status": "CURRENT"}
]
})
@app.teardown_request
def teardown_request(_ex=None):
context.set_ctx(None)
app.register_blueprint(api_v10.rest, url_prefix='/v1.0')
app.register_blueprint(api_v10.rest, url_prefix='/v1.1')
app.register_blueprint(api_v11.rest, url_prefix='/v1.1')
def make_json_error(ex):
status_code = (ex.code
if isinstance(ex, werkzeug_exceptions.HTTPException)
else 500)
description = (ex.description
if isinstance(ex, werkzeug_exceptions.HTTPException)
else str(ex))
return api_utils.render({'error': status_code,
'error_message': description},
status=status_code)
for code in six.iterkeys(werkzeug_exceptions.default_exceptions):
app.error_handler_spec[None][code] = make_json_error
if CONF.debug and not CONF.log_exchange:
LOG.debug('Logging of request/response exchange could be enabled using'
' flag --log-exchange')
if CONF.log_exchange:
app.wsgi_app = log_exchange.LogExchange.factory(CONF)(app.wsgi_app)
app.wsgi_app = auth_valid.wrap(app.wsgi_app)
app.wsgi_app = acl.wrap(app.wsgi_app, CONF)
return app
def _load_driver(namespace, name):
extension_manager = stevedore.DriverManager(
namespace=namespace,
name=name,
invoke_on_load=True
)
return extension_manager.driver
def _get_infrastructure_engine():
"""Import and return one of sahara.service.*_engine.py modules."""
LOG.info(_LI("Loading '%s' infrastructure engine"),
CONF.infrastructure_engine)
return _load_driver('sahara.infrastructure.engine',
CONF.infrastructure_engine)
def _get_remote_driver():
LOG.info(_LI("Loading '%s' remote"), CONF.remote)
return _load_driver('sahara.remote', CONF.remote)
def _get_ops_driver(driver_name):
LOG.info(_LI("Loading '%s' ops"), driver_name)
return _load_driver('sahara.run.mode', driver_name)