# Copyright 2012 OpenStack LLC.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""
Command-line interface to the OpenStack Images API.
"""
import argparse
import httplib2
import re
import sys
from keystoneclient.v2_0 import client as ksclient
import glanceclient.client
from glanceclient.common import exceptions as exc
from glanceclient.common import utils
class OpenStackImagesShell(object):
def get_base_parser(self):
parser = argparse.ArgumentParser(
prog='glance',
description=__doc__.strip(),
epilog='See "glance help COMMAND" '
'for help on a specific command.',
add_help=False,
formatter_class=HelpFormatter,
)
# Global arguments
parser.add_argument('-h', '--help',
action='store_true',
help=argparse.SUPPRESS,
)
parser.add_argument('--debug',
default=False,
action='store_true',
help=argparse.SUPPRESS)
parser.add_argument('--insecure',
default=False,
action='store_true',
help=argparse.SUPPRESS)
parser.add_argument('--os-username',
default=utils.env('OS_USERNAME'),
help='Defaults to env[OS_USERNAME]')
parser.add_argument('--os-password',
default=utils.env('OS_PASSWORD'),
help='Defaults to env[OS_PASSWORD]')
parser.add_argument('--os-tenant-id',
default=utils.env('OS_TENANT_ID'),
help='Defaults to env[OS_TENANT_ID]')
parser.add_argument('--os-tenant-name',
default=utils.env('OS_TENANT_NAME'),
help='Defaults to env[OS_TENANT_NAME]')
parser.add_argument('--os-auth-url',
default=utils.env('OS_AUTH_URL'),
help='Defaults to env[OS_AUTH_URL]')
parser.add_argument('--os-region-name',
default=utils.env('OS_REGION_NAME'),
help='Defaults to env[OS_REGION_NAME]')
parser.add_argument('--os-auth-token',
default=utils.env('OS_AUTH_TOKEN'),
help='Defaults to env[OS_AUTH_TOKEN]')
parser.add_argument('--os-image-url',
default=utils.env('OS_IMAGE_URL'),
help='Defaults to env[OS_IMAGE_URL]')
parser.add_argument('--os-image-api-version',
default=utils.env('OS_IMAGE_API_VERSION', default='1'),
help='Defaults to env[OS_IMAGE_API_VERSION] or 1')
parser.add_argument('--os-service-type',
default=utils.env('OS_SERVICE_TYPE'),
help='Defaults to env[OS_SERVICE_TYPE]')
return parser
def get_subcommand_parser(self, version):
parser = self.get_base_parser()
self.subcommands = {}
subparsers = parser.add_subparsers(metavar='<subcommand>')
submodule = utils.import_versioned_module(version, 'shell')
self._find_actions(subparsers, submodule)
self._find_actions(subparsers, self)
return parser
def _find_actions(self, subparsers, actions_module):
for attr in (a for a in dir(actions_module) if a.startswith('do_')):
# I prefer to be hypen-separated instead of underscores.
command = attr[3:].replace('_', '-')
callback = getattr(actions_module, attr)
desc = callback.__doc__ or ''
help = desc.strip().split('\n')[0]
arguments = getattr(callback, 'arguments', [])
subparser = subparsers.add_parser(command,
help=help,
description=desc,
add_help=False,
formatter_class=HelpFormatter
)
subparser.add_argument('-h', '--help',
action='help',
help=argparse.SUPPRESS,
)
self.subcommands[command] = subparser
for (args, kwargs) in arguments:
subparser.add_argument(*args, **kwargs)
subparser.set_defaults(func=callback)
# TODO(dtroyer): move this into the common client support?
# Compatibility check to remove API version as the trailing component
# in a service endpoint; also removes a trailing '/'
def _strip_version(self, endpoint):
"""Strip a version from the last component of an endpoint if present"""
# Get rid of trailing '/' if present
if endpoint.endswith('/'):
endpoint = endpoint[:-1]
url_bits = endpoint.split('/')
# regex to match 'v1' or 'v2.0' etc
if re.match('v\d+\.?\d*', url_bits[-1]):
endpoint = '/'.join(url_bits[:-1])
return endpoint
def _authenticate(self, **kwargs):
"""Get an endpoint and auth token from Keystone.
:param username: name of user
:param password: user's password
:param tenant_id: unique identifier of tenant
:param tenant_name: name of tenant
:param auth_url: endpoint to authenticate against
"""
_ksclient = ksclient.Client(username=kwargs.get('username'),
password=kwargs.get('password'),
tenant_id=kwargs.get('tenant_id'),
tenant_name=kwargs.get('tenant_name'),
auth_url=kwargs.get('auth_url'))
service_type = kwargs.get('service_type') or 'image'
endpoint = _ksclient.service_catalog.url_for(
service_type=service_type,
endpoint_type='publicURL')
endpoint = self._strip_version(endpoint)
return (endpoint, _ksclient.auth_token)
def main(self, argv):
# Parse args once to find version
parser = self.get_base_parser()
(options, args) = parser.parse_known_args(argv)
# build available subcommands based on version
api_version = options.os_image_api_version
subcommand_parser = self.get_subcommand_parser(api_version)
self.parser = subcommand_parser
# Handle top-level --help/-h before attempting to parse
# a command off the command line
if options.help or not argv:
self.do_help(options)
return 0
# Parse args again and call whatever callback was selected
args = subcommand_parser.parse_args(argv)
# Deal with global arguments
if args.debug:
httplib2.debuglevel = 1
# Short-circuit and deal with help command right away.
if args.func == self.do_help:
self.do_help(args)
return 0
auth_reqd = (utils.is_authentication_required(args.func) and
not (args.os_auth_token and args.os_image_url))
if not auth_reqd:
endpoint = args.os_image_url
token = args.os_auth_token
else:
if not args.os_username:
raise exc.CommandError("You must provide a username via"
" either --os-username or env[OS_USERNAME]")
if not args.os_password:
raise exc.CommandError("You must provide a password via"
" either --os-password or env[OS_PASSWORD]")
if not (args.os_tenant_id or args.os_tenant_name):
raise exc.CommandError("You must provide a tenant_id via"
" either --os-tenant-id or via env[OS_TENANT_ID]")
if not args.os_auth_url:
raise exc.CommandError("You must provide an auth url via"
" either --os-auth-url or via env[OS_AUTH_URL]")
kwargs = {
'username': args.os_username,
'password': args.os_password,
'tenant_id': args.os_tenant_id,
'tenant_name': args.os_tenant_name,
'auth_url': args.os_auth_url,
'service_type': args.os_service_type
}
endpoint, token = self._authenticate(**kwargs)
image_service = glanceclient.client.Client(
api_version, endpoint, token, insecure=args.insecure)
try:
args.func(image_service, args)
except exc.Unauthorized:
raise exc.CommandError("Invalid OpenStack Identity credentials.")
except exc.AuthorizationFailure:
raise exc.CommandError("Unable to authorize user")
@utils.arg('command', metavar='<subcommand>', nargs='?',
help='Display help for <subcommand>')
def do_help(self, args):
"""
Display help about this program or one of its subcommands.
"""
if getattr(args, 'command', None):
if args.command in self.subcommands:
self.subcommands[args.command].print_help()
else:
raise exc.CommandError("'%s' is not a valid subcommand" %
args.command)
else:
self.parser.print_help()
class HelpFormatter(argparse.HelpFormatter):
def start_section(self, heading):
# Title-case the headings
heading = '%s%s' % (heading[0].upper(), heading[1:])
super(HelpFormatter, self).start_section(heading)
def main():
try:
OpenStackImagesShell().main(sys.argv[1:])
except Exception, e:
if httplib2.debuglevel == 1:
raise
else:
print >> sys.stderr, e
sys.exit(1)