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#!/usr/bin/python
# Copyright (C) 2014-2015 Codethink Limited
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program. If not, see <http://www.gnu.org/licenses/>.
'''Preparatory checks for Morph 'openstack' write extension'''
import os
import urlparse
import keystoneclient
import writeexts
class OpenStackCheckExtension(writeexts.WriteExtension):
def process_args(self, args):
if len(args) != 1:
raise writeexts.ExtensionError(
'Wrong number of command line args')
self.require_btrfs_in_deployment_host_kernel()
upgrade = self.get_environment_boolean('UPGRADE')
if upgrade:
raise writeexts.ExtensionError(
'Use the `ssh-rsync` write extension to deploy upgrades to an '
'existing remote system.')
location = args[0]
self.check_location(location)
self.check_imagename()
self.check_openstack_parameters(self._get_auth_parameters(location))
def _get_auth_parameters(self, location):
'''Check the environment variables needed and returns all.
The environment variables are described in the class documentation.
'''
auth_keys = {'OPENSTACK_USER': 'username',
'OPENSTACK_TENANT': 'tenant_name',
'OPENSTACK_PASSWORD': 'password'}
for key in auth_keys:
if os.environ.get(key, '') == '':
raise writeexts.ExtensionError(key + ' was not given')
auth_params = {auth_keys[key]: os.environ[key] for key in auth_keys}
auth_params['auth_url'] = location
return auth_params
def check_imagename(self):
if os.environ.get('OPENSTACK_IMAGENAME', '') == '':
raise writeexts.ExtensionError(
'OPENSTACK_IMAGENAME was not given')
def check_location(self, location):
x = urlparse.urlparse(location)
if x.scheme not in ['http', 'https']:
raise writeexts.ExtensionError(
'URL schema must be http or https in %s' % location)
if (x.path != '/v2.0' and x.path != '/v2.0/'):
raise writeexts.ExtensionError(
'API version must be v2.0 in %s' % location)
def check_openstack_parameters(self, auth_params):
''' Check that we can connect to and authenticate with openstack '''
self.status(msg='Checking OpenStack credentials...')
try:
keystoneclient.v2_0.Client(**auth_params)
except keystoneclient.exceptions.Unauthorized:
errmsg = ('Failed to authenticate with OpenStack '
'(are your credentials correct?)')
raise writeexts.ExtensionError(errmsg)
OpenStackCheckExtension().run()
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