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#!/usr/bin/python
# Copyright (C) 2013 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
'''A Morph deployment write extension for deploying to OpenStack.'''
import cliapp
import os
import tempfile
import urlparse
import morphlib.writeexts
class OpenStackWriteExtension(morphlib.writeexts.WriteExtension):
'''Configure a raw disk image into an OpenStack host.
The raw disk image is created during Morph's deployment and the
image is deployed in OpenStack using python-glanceclient.
The location command line argument is the authentification url
of the OpenStack server using the following syntax:
http://HOST:PORT/VERSION
where
* HOST is the host running OpenStack
* PORT is the port which is using OpenStack for authentifications.
* VERSION is the authentification version of OpenStack (Only v2.0
supported)
This extension needs in the environment the following variables:
* OPENSTACK_USER is the username to use in the deployment.
* OPENSTACK_TENANT is the project name to use in the deployment.
* OPENSTACK_IMAGENAME is the name of the image to create.
* OPENSTACK_PASSWORD is the password of the user.
The extension will connect to OpenStack using python-glanceclient
to configure a raw image.
'''
def process_args(self, args):
if len(args) != 2:
raise cliapp.AppException('Wrong number of command line args')
temp_root, location = args
self.check_location(location)
os_params = self.get_openstack_parameters()
fd, raw_disk = tempfile.mkstemp()
os.close(fd)
self.create_local_system(temp_root, raw_disk)
self.status(msg='Temporary disk image has been created at %s'
% raw_disk)
self.set_extlinux_root_to_virtio(raw_disk)
self.configure_openstack_image(raw_disk, location, os_params)
def set_extlinux_root_to_virtio(self, raw_disk):
'''Re-configures extlinux to use virtio disks'''
self.status(msg='Updating extlinux.conf')
mp = self.mount(raw_disk)
try:
path = os.path.join(mp, 'extlinux.conf')
with open(path) as f:
extlinux_conf = f.read()
extlinux_conf = extlinux_conf.replace('root=/dev/sda',
'root=/dev/vda')
with open(path, "w") as f:
f.write(extlinux_conf)
finally:
self.unmount(mp)
def get_openstack_parameters(self):
'''Check the environment variables needed and returns all.
The environment variables are described in the class documentation.
'''
keys = ('OPENSTACK_USER', 'OPENSTACK_TENANT',
'OPENSTACK_IMAGENAME', 'OPENSTACK_PASSWORD')
for key in keys:
if key not in os.environ:
raise cliapp.AppException(key + ' was not given')
return (os.environ[key] for key in keys)
def check_location(self, location):
x = urlparse.urlparse(location)
if x.scheme != 'http':
raise cliapp.AppException('URL schema must be http in %s' \
% location)
if (x.path != '/v2.0' and x.path != '/v2.0/'):
raise cliapp.AppException('API version must be v2.0 in %s'\
% location)
def configure_openstack_image(self, raw_disk, auth_url, os_params):
'''Configure the image in OpenStack using glance-client'''
self.status(msg='Configuring OpenStack image...')
username, tenant_name, image_name, password = os_params
cmdline = ['glance',
'--os-username', username,
'--os-tenant-name', tenant_name,
'--os-password', password,
'--os-auth-url', auth_url,
'image-create',
'--name=%s' % image_name,
'--disk-format=raw',
'--container-format', 'bare',
'--file', raw_disk]
cliapp.runcmd(cmdline)
self.status(msg='Image configured.')
OpenStackWriteExtension().run()
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