Synnefo » snf-image-creator

# -*- coding: utf-8 -*-

#

# Copyright 2012 GRNET S.A. All rights reserved.

#

# Redistribution and use in source and binary forms, with or

# without modification, are permitted provided that the following

# conditions are met:

#

#   1. Redistributions of source code must retain the above

#      copyright notice, this list of conditions and the following

#      disclaimer.

#

#   2. Redistributions in binary form must reproduce the above

#      copyright notice, this list of conditions and the following

#      disclaimer in the documentation and/or other materials

#      provided with the distribution.

#

# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

# POSSIBILITY OF SUCH DAMAGE.

#

# The views and conclusions contained in the software and

# documentation are those of the authors and should not be

# interpreted as representing official policies, either expressed

# or implied, of GRNET S.A.

"""This modules provides the interface for working with the ./kamaki library.

The library is used to upload images to and register them with a Synnefo

deployment.

"""

from os.path import basename

from kamaki.cli.config import Config

from kamaki.clients import ClientError

from kamaki.clients.image import ImageClient

from kamaki.clients.pithos import PithosClient

from kamaki.clients.astakos import AstakosClient

class Kamaki(object):

    """Wrapper class for the ./kamaki library"""

    CONTAINER = "images"

    @staticmethod

    def get_token():

        """Get the saved token"""

        config = Config()

        return config.get('global', 'token')

    @staticmethod

    def save_token(token):

        """Save this token to the configuration file"""

        config = Config()

        config.set('global', 'token', token)

        config.write()

    @staticmethod

    def get_account(token):

        """Return the account corresponding to this token"""

        config = Config()

        astakos = AstakosClient(config.get('user', 'url'), token)

        try:

            account = astakos.info()

        except ClientError as e:

            if e.status == 401:  # Unauthorized: invalid token

                return None

            else:

                raise

        return account

    def __init__(self, account, output):

        """Create a Kamaki instance"""

        self.account = account

        self.out = output

        config = Config()

        pithos_url = config.get('file', 'url')

        self.pithos_client = PithosClient(

            pithos_url, self.account['auth_token'], self.account['uuid'],

            self.CONTAINER)

        image_url = config.get('image', 'url')

        self.image_client = ImageClient(image_url, self.account['auth_token'])

    def upload(self, file_obj, size=None, remote_path=None, hp=None, up=None):

        """Upload a file to pithos"""

        path = basename(file_obj.name) if remote_path is None else remote_path

        try:

            self.pithos_client.create_container(self.CONTAINER)

        except ClientError as e:

            if e.status != 202:  # Ignore container already exists errors

                raise e

        hash_cb = self.out.progress_generator(hp) if hp is not None else None

        upload_cb = self.out.progress_generator(up) if up is not None else None

        self.pithos_client.upload_object(path, file_obj, size, hash_cb,

                                         upload_cb)

        return "pithos://%s/%s/%s" % (self.account['uuid'], self.CONTAINER,

                                      path)

    def register(self, name, location, metadata, public=False):

        """Register an image to ~okeanos"""

        # Convert all metadata to strings

        str_metadata = {}

        for (key, value) in metadata.iteritems():

            str_metadata[str(key)] = str(value)

        is_public = 'true' if public else 'false'

        params = {'is_public': is_public, 'disk_format': 'diskdump'}

        self.image_client.register(name, location, params, str_metadata)

    def share(self, location):

        """Share this file with all the users"""

        self.pithos_client.set_object_sharing(location, "*")

    def object_exists(self, location):

        """Check if an object exists in pythos"""

        try:

            self.pithos_client.get_object_info(location)

        except ClientError as e:

            if e.status == 404:  # Object not found error

                return False

            else:

                raise

        return True

# vim: set sta sts=4 shiftwidth=4 sw=4 et ai :