kamaki_wrapper.py

# Copyright 2012 GRNET S.A. All rights reserved.
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from os.path import basename

from kamaki.config import Config
from kamaki.clients import ClientError
from kamaki.clients.image import ImageClient
from kamaki.clients.pithos import PithosClient

from image_creator.util import FatalError

CONTAINER = "images"


class Kamaki(object):

    @staticmethod
    def get_account():
        config = Config()
        return config.get('store', 'account') or \
            config.get('global', 'account')

    @staticmethod
    def get_token():
        config = Config()
        return config.get('global', 'token')

    @staticmethod
    def save_account(account):
        config = Config()
        config.set('store', 'account', account)
        config.write()

    @staticmethod
    def save_token(token):
        config = Config()
        config.set('global', 'token', token)
        config.write()

    def __init__(self, account, token, output):
        self.account = account
        self.token = token
        self.out = output

        config = Config()

        pithos_url = config.get('store', 'url')
        self.container = CONTAINER
        self.pithos_client = PithosClient(pithos_url, self.token, self.account,
                                          self.container)

        image_url = config.get('image', 'url')
        self.image_client = ImageClient(image_url, self.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, self.container, path)

    def register(self, name, location, metadata):
        """Register an image to ~okeanos"""

        # Convert all metadata to strings
        str_metadata = {}
        for (key, value) in metadata.iteritems():
            str_metadata[str(key)] = str(value)

        params = {'is_public': 'true', 'disk_format': 'diskdump'}
        self.image_client.register(name, location, params, str_metadata)

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