286 lines
11 KiB
Python
286 lines
11 KiB
Python
# Copyright 2010 Jacob Kaplan-Moss
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# Copyright 2011 OpenStack LLC.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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Command-line interface to the OpenStack LBaaS API.
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"""
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import argparse
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import httplib2
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import os
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import sys
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import logging
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from balancerclient.common import exceptions as exc
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from balancerclient.common import utils
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from balancerclient.v1 import shell as shell_v1
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LOG = logging.getLogger(__name__)
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class OpenStackBalancerShell(object):
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def get_base_parser(self):
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parser = argparse.ArgumentParser(
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prog='balancer',
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description=__doc__.strip(),
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epilog='See "balancer help COMMAND" '
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'for help on a specific command.',
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add_help=False,
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formatter_class=OpenStackHelpFormatter,
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)
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# Global arguments
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parser.add_argument('-h',
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'--help',
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action='store_true',
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help=argparse.SUPPRESS)
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parser.add_argument('--debug',
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default=False,
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action='store_true',
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help=argparse.SUPPRESS)
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parser.add_argument('--os_username',
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metavar='<auth-user-name>',
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default=utils.env('OS_USERNAME'),
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help='Defaults to env[OS_USERNAME]')
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parser.add_argument('--os_password',
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metavar='<auth-password>',
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default=utils.env('OS_PASSWORD'),
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help='Defaults to env[OS_PASSWORD]')
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parser.add_argument('--os_tenant_name',
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metavar='<auth-tenant-name>',
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default=utils.env('OS_TENANT_NAME'),
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help='Defaults to env[OS_TENANT_NAME]')
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parser.add_argument('--os_tenant_id',
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metavar='<tenant-id>',
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default=utils.env('OS_TENANT_ID'),
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help='Defaults to env[OS_TENANT_ID]')
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parser.add_argument('--os_auth_url',
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metavar='<auth-url>',
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default=utils.env('OS_AUTH_URL'),
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help='Defaults to env[OS_AUTH_URL]')
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parser.add_argument('--os_region_name',
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metavar='<region-name>',
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default=utils.env('OS_REGION_NAME'),
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help='Defaults to env[OS_REGION_NAME]')
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parser.add_argument('--os_balancer_api_version',
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metavar='<balancer-api-version>',
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default=utils.env('OS_BALANCER_API_VERSION',
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'KEYSTONE_VERSION'),
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help='Defaults to env[OS_BALANCER_API_VERSION]'
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' or 2.0')
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parser.add_argument('--token',
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metavar='<service-token>',
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default=utils.env('SERVICE_TOKEN'),
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help='Defaults to env[SERVICE_TOKEN]')
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parser.add_argument('--endpoint',
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metavar='<service-endpoint>',
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default=utils.env('SERVICE_ENDPOINT'),
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help='Defaults to env[SERVICE_ENDPOINT]')
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return parser
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def get_subcommand_parser(self, version):
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parser = self.get_base_parser()
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self.subcommands = {}
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subparsers = parser.add_subparsers(metavar='<subcommand>')
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try:
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actions_module = {
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'1': shell_v1,
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}[version]
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except KeyError:
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actions_module = shell_v1
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self._find_actions(subparsers, actions_module)
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self._find_actions(subparsers, self)
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return parser
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def _find_actions(self, subparsers, actions_module):
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for attr in (a for a in dir(actions_module) if a.startswith('do_')):
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# I prefer to be hypen-separated instead of underscores.
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command = attr[3:].replace('_', '-')
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callback = getattr(actions_module, attr)
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desc = callback.__doc__ or ''
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help = desc.strip().split('\n')[0]
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arguments = getattr(callback, 'arguments', [])
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subparser = subparsers.add_parser(
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command,
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help=help,
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description=desc,
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add_help=False,
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formatter_class=OpenStackHelpFormatter)
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subparser.add_argument('-h', '--help', action='help',
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help=argparse.SUPPRESS)
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self.subcommands[command] = subparser
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for (args, kwargs) in arguments:
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subparser.add_argument(*args, **kwargs)
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subparser.set_defaults(func=callback)
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def main(self, argv):
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# Parse args once to find version
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parser = self.get_base_parser()
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(options, args) = parser.parse_known_args(argv)
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# build available subcommands based on version
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api_version = options.os_balancer_api_version
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subcommand_parser = self.get_subcommand_parser(api_version)
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self.parser = subcommand_parser
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# Handle top-level --help/-h before attempting to parse
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# a command off the command line
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if not argv or options.help:
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self.do_help(options)
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return 0
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# Parse args again and call whatever callback was selected
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args = subcommand_parser.parse_args(argv)
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# Deal with global arguments
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if args.debug:
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httplib2.debuglevel = 1
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# Short-circuit and deal with help command right away.
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if args.func == self.do_help:
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self.do_help(args)
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return 0
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#FIXME(usrleon): Here should be restrict for project id same as
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# for username or apikey but for compatibility it is not.
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if not utils.isunauthenticated(args.func):
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# if the user hasn't provided any auth data
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if not (args.token or args.endpoint or args.os_username or
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args.os_password or args.os_auth_url):
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raise exc.CommandError('Expecting authentication method via \n'
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' either a service token, '
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'--token or env[SERVICE_TOKEN], \n'
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' or credentials, '
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'--os_username or env[OS_USERNAME].')
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# if it looks like the user wants to provide a service token
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# but is missing something
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if args.token or args.endpoint and not (
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args.token and args.endpoint):
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if not args.token:
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raise exc.CommandError(
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'Expecting a token provided via either --token or '
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'env[SERVICE_TOKEN]')
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if not args.endpoint:
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raise exc.CommandError(
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'Expecting an endpoint provided via either --endpoint '
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'or env[SERVICE_ENDPOINT]')
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# if it looks like the user wants to provide a credentials
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# but is missing something
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if ((args.os_username or args.os_password or args.os_auth_url)
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and not (args.os_username and args.os_password and
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args.os_auth_url)):
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if not args.os_username:
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raise exc.CommandError(
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'Expecting a username provided via either '
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'--os_username or env[OS_USERNAME]')
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if not args.os_password:
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raise exc.CommandError(
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'Expecting a password provided via either '
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'--os_password or env[OS_PASSWORD]')
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if not args.os_auth_url:
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raise exc.CommandError(
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'Expecting an auth URL via either --os_auth_url or '
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'env[OS_AUTH_URL]')
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if utils.isunauthenticated(args.func):
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self.cs = shell_generic.CLIENT_CLASS(endpoint=args.os_auth_url)
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else:
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token = None
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endpoint = None
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if args.token and args.endpoint:
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token = args.token
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endpoint = args.endpoint
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api_version = options.os_balancer_api_version
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self.cs = self.get_api_class(api_version)(
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username=args.os_username,
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tenant_name=args.os_tenant_name,
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tenant_id=args.os_tenant_id,
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token=token,
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endpoint=endpoint,
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password=args.os_password,
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auth_url=args.os_auth_url,
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region_name=args.os_region_name)
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try:
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args.func(self.cs, args)
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except exc.Unauthorized:
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raise exc.CommandError("Invalid OpenStack LBaaS credentials.")
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except exc.AuthorizationFailure:
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raise exc.CommandError("Unable to authorize user")
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def get_api_class(self, version):
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try:
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return {
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"1": shell_v1.CLIENT_CLASS,
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}[version]
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except KeyError:
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return shell_v1.CLIENT_CLASS
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@utils.arg('command', metavar='<subcommand>', nargs='?',
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help='Display help for <subcommand>')
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def do_help(self, args):
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"""
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Display help about this program or one of its subcommands.
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"""
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if getattr(args, 'command', None):
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if args.command in self.subcommands:
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self.subcommands[args.command].print_help()
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else:
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raise exc.CommandError("'%s' is not a valid subcommand" %
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args.command)
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else:
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self.parser.print_help()
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# I'm picky about my shell help.
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class OpenStackHelpFormatter(argparse.HelpFormatter):
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def start_section(self, heading):
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# Title-case the headings
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heading = '%s%s' % (heading[0].upper(), heading[1:])
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super(OpenStackHelpFormatter, self).start_section(heading)
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def main():
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try:
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return OpenStackBalancerShell().main(sys.argv[1:])
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except Exception, err:
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LOG.exception("The operation executed with an error %r." % err)
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raise
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