102 lines
3.6 KiB
Python
Executable File
102 lines
3.6 KiB
Python
Executable File
#!/usr/bin/env python
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# pylint: disable=C0103
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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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");
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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 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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"""Starter script for Nova Direct API."""
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import gettext
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import os
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import sys
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# If ../nova/__init__.py exists, add ../ to Python search path, so that
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# it will override what happens to be installed in /usr/(local/)lib/python...
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possible_topdir = os.path.normpath(os.path.join(os.path.abspath(sys.argv[0]),
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os.pardir,
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os.pardir))
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if os.path.exists(os.path.join(possible_topdir, 'nova', '__init__.py')):
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sys.path.insert(0, possible_topdir)
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gettext.install('nova', unicode=1)
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from nova import compute
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from nova import flags
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from nova import log as logging
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from nova import network
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from nova import utils
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from nova import volume
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from nova import wsgi
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from nova.api import direct
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FLAGS = flags.FLAGS
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flags.DEFINE_integer('direct_port', 8001, 'Direct API port')
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flags.DEFINE_string('direct_host', '0.0.0.0', 'Direct API host')
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flags.DEFINE_flag(flags.HelpFlag())
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flags.DEFINE_flag(flags.HelpshortFlag())
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flags.DEFINE_flag(flags.HelpXMLFlag())
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# An example of an API that only exposes read-only methods.
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# In this case we're just limiting which methods are exposed.
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class ReadOnlyCompute(direct.Limited):
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"""Read-only Compute API."""
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_allowed = ['get', 'get_all', 'get_console_output']
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# An example of an API that provides a backwards compatibility layer.
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# In this case we're overwriting the implementation to ensure
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# compatibility with an older version. In reality we would want the
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# "description=None" to be part of the actual API so that code
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# like this isn't even necessary, but this example shows what one can
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# do if that isn't the situation.
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class VolumeVersionOne(direct.Limited):
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_allowed = ['create', 'delete', 'update', 'get']
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def create(self, context, size, name):
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self.proxy.create(context, size, name, description=None)
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if __name__ == '__main__':
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utils.default_flagfile()
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FLAGS(sys.argv)
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logging.setup()
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direct.register_service('compute', compute.API())
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direct.register_service('volume', volume.API())
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direct.register_service('network', network.API())
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direct.register_service('reflect', direct.Reflection())
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# Here is how we could expose the code in the examples above.
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#direct.register_service('compute-readonly',
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# ReadOnlyCompute(compute.API()))
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#direct.register_service('volume-v1', VolumeVersionOne(volume.API()))
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router = direct.Router()
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with_json = direct.JsonParamsMiddleware(router)
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with_req = direct.PostParamsMiddleware(with_json)
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with_auth = direct.DelegatedAuthMiddleware(with_req)
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server = wsgi.Server("Direct API",
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with_auth,
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host=FLAGS.direct_host,
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port=FLAGS.direct_port)
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server.start()
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server.wait()
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