# -*- coding: utf-8 -*-
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"""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.
"""
import sys
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 CachedAstakosClient as AstakosClient
try:
config = Config()
except Exception as e:
sys.stderr.write("Kamaki config error: %s\n" % str(e))
sys.exit(1)
class Kamaki(object):
"""Wrapper class for the ./kamaki library"""
CONTAINER = "images"
@staticmethod
def get_default_cloud_name():
"""Returns the name of the default cloud"""
clouds = config.keys('cloud')
default = config.get('global', 'default_cloud')
if not default:
return clouds[0] if len(clouds) else ""
return default if default in clouds else ""
@staticmethod
def set_default_cloud(name):
"""Sets a cloud account as default"""
config.set('global', 'default_cloud', name)
config.write()
@staticmethod
def get_clouds():
"""Returns the list of available clouds"""
names = config.keys('cloud')
clouds = {}
for name in names:
clouds[name] = config.get('cloud', name)
return clouds
@staticmethod
def get_cloud_by_name(name):
"""Returns a dictionary with cloud info"""
return config.get('cloud', name)
@staticmethod
def save_cloud(name, url, token, description=""):
"""Save a new cloud account"""
cloud = {'url': url, 'token': token}
if len(description):
cloud['description'] = description
config.set('cloud', name, cloud)
# Make the saved cloud the default one
config.set('global', 'default_cloud', name)
config.write()
@staticmethod
def remove_cloud(name):
"""Deletes an existing cloud from the ./Kamaki configuration file"""
config.remove_option('cloud', name)
config.write()
@staticmethod
def create_account(url, token):
"""Given a valid (URL, tokens) pair this method returns an Astakos
client instance
"""
client = AstakosClient(url, token)
try:
client.authenticate()
except ClientError:
return None
return client
@staticmethod
def get_account(cloud_name):
"""Given a saved cloud name this method returns an Astakos client
instance
"""
cloud = config.get('cloud', cloud_name)
assert cloud, "cloud: `%s' does not exist" % cloud_name
assert 'url' in cloud, "url attr is missing in %s" % cloud_name
assert 'token' in cloud, "token attr is missing in %s" % cloud_name
return Kamaki.create_account(cloud['url'], cloud['token'])
def __init__(self, account, output):
"""Create a Kamaki instance"""
self.account = account
self.out = output
self.pithos = PithosClient(
self.account.get_service_endpoints('object-store')['publicURL'],
self.account.token,
self.account.user_info()['id'],
self.CONTAINER)
self.image = ImageClient(
self.account.get_service_endpoints('image')['publicURL'],
self.account.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.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.upload_object(path, file_obj, size, hash_cb, upload_cb)
return "pithos://%s/%s/%s" % (self.account.user_info()['id'],
self.CONTAINER, path)
def register(self, name, location, metadata, public=False):
"""Register an image with Cyclades"""
# 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'}
return self.image.register(name, location, params, str_metadata)
def share(self, location):
"""Share this file with all the users"""
self.pithos.set_object_sharing(location, "*")
def object_exists(self, location):
"""Check if an object exists in Pithos+"""
try:
self.pithos.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 :