OpenStack Study: remote_consoles.py

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# 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 webob

from nova.api.openstack import common

from nova.api.openstack import extensions

from nova.api.openstack import wsgi

from nova import compute

from nova import exception

from nova.openstack.common.gettextutils import _

ALIAS = "os-remote-consoles"

authorize = extensions.extension_authorizer('compute', 'v3:' + ALIAS)

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class RemoteConsolesController(wsgi.Controller):

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def __init__(self, *args, **kwargs):

self.compute_api = compute.API()

super(RemoteConsolesController, self).__init__(*args, **kwargs)

@extensions.expected_errors((400, 404, 409, 501))

@wsgi.action('get_vnc_console')

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def get_vnc_console(self, req, id, body):

"""Get text console output."""

context = req.environ['nova.context']

authorize(context)

# If type is not supplied or unknown, get_vnc_console below will cope

console_type = body['get_vnc_console'].get('type')

try:

instance = common.get_instance(self.compute_api, context, id,

want_objects=True)

output = self.compute_api.get_vnc_console(context,

instance,

console_type)

except exception.ConsoleTypeInvalid as e:

raise webob.exc.HTTPBadRequest(explanation=e.format_message())

except exception.ConsoleTypeUnavailable as e:

raise webob.exc.HTTPBadRequest(explanation=e.format_message())

except exception.InstanceNotFound as e:

raise webob.exc.HTTPNotFound(explanation=e.format_message())

except exception.InstanceNotReady as e:

raise webob.exc.HTTPConflict(explanation=e.format_message())

except NotImplementedError:

msg = _("Unable to get vnc console, functionality not implemented")

raise webob.exc.HTTPNotImplemented(explanation=msg)

return {'console': {'type': console_type, 'url': output['url']}}

@extensions.expected_errors((400, 404, 409, 501))

@wsgi.action('get_spice_console')

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def get_spice_console(self, req, id, body):

"""Get text console output."""

context = req.environ['nova.context']

authorize(context)

# If type is not supplied or unknown, get_spice_console below will cope

console_type = body['get_spice_console'].get('type')

try:

instance = common.get_instance(self.compute_api, context, id,

want_objects=True)

output = self.compute_api.get_spice_console(context,

instance,

console_type)

except exception.ConsoleTypeInvalid as e:

raise webob.exc.HTTPBadRequest(explanation=e.format_message())

except exception.ConsoleTypeUnavailable as e:

raise webob.exc.HTTPBadRequest(explanation=e.format_message())

except exception.InstanceNotFound as e:

raise webob.exc.HTTPNotFound(explanation=e.format_message())

except exception.InstanceNotReady as e:

raise webob.exc.HTTPConflict(explanation=e.format_message())

except NotImplementedError:

msg = _("Unable to get spice console, "

"functionality not implemented")

raise webob.exc.HTTPNotImplemented(explanation=msg)

return {'console': {'type': console_type, 'url': output['url']}}

@extensions.expected_errors((400, 404, 409, 501))

@wsgi.action('get_rdp_console')

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def get_rdp_console(self, req, id, body):

"""Get text console output."""

context = req.environ['nova.context']

authorize(context)

# If type is not supplied or unknown, get_rdp_console below will cope

console_type = body['get_rdp_console'].get('type')

instance = common.get_instance(self.compute_api, context, id,

want_objects=True)

try:

# NOTE(mikal): get_rdp_console() can raise InstanceNotFound, so

# we still need to catch it here.

output = self.compute_api.get_rdp_console(context,

instance,

console_type)

except exception.ConsoleTypeInvalid as e:

raise webob.exc.HTTPBadRequest(explanation=e.format_message())

except exception.ConsoleTypeUnavailable as e:

raise webob.exc.HTTPBadRequest(explanation=e.format_message())

except exception.InstanceNotFound as e:

raise webob.exc.HTTPNotFound(explanation=e.format_message())

except exception.InstanceNotReady as e:

raise webob.exc.HTTPConflict(explanation=e.format_message())

except NotImplementedError:

msg = _("Unable to get rdp console, functionality not implemented")

raise webob.exc.HTTPNotImplemented(explanation=msg)

return {'console': {'type': console_type, 'url': output['url']}}

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class RemoteConsoles(extensions.V3APIExtensionBase):

"""Interactive Console support."""

name = "RemoteConsoles"

alias = ALIAS

version = 1

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def get_controller_extensions(self):

controller = RemoteConsolesController()

extension = extensions.ControllerExtension(self, 'servers', controller)

return [extension]

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def get_resources(self):

return []