python-openstackclient/openstackclient/shell.py
Dean Troyer e063246b97 Clean up shell authentication
* Remove the auth option checks as the auth plugins will validate
  their own options
* Move the initialization of client_manager to the end of
  initialize_app() so it is always called.  Note that no attempts
  to actually authenticate occur until the first use of one of the
  client attributes in client_manager.  This leaves
  initialize_clientmanager() (formerly uathenticate_user()) empty
  so remove it.
* Remove interact() as the client_manager has already been created
  And there is nothing left.
* prepare_to_run_command() is reduced to trigger an authentication
  attempt for the best_effort auth commands, currently the only
  one is 'complete'.
* Add prompt_for_password() to ask the user to enter a password
  when necessary.  Passed to ClientManager in a new kward pw_func.

Bug: 1355838
Change-Id: I9fdec9144c4c84f65aed1cf91ce41fe1895089b2
2014-10-21 23:16:16 -05:00

343 lines
12 KiB
Python

# Copyright 2012-2013 OpenStack Foundation
#
# 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 APIs"""
import getpass
import logging
import sys
import traceback
from cliff import app
from cliff import command
from cliff import complete
from cliff import help
import openstackclient
from openstackclient.common import clientmanager
from openstackclient.common import commandmanager
from openstackclient.common import exceptions as exc
from openstackclient.common import timing
from openstackclient.common import utils
DEFAULT_DOMAIN = 'default'
def prompt_for_password(prompt=None):
"""Prompt user for a password
Propmpt for a password if stdin is a tty.
"""
if not prompt:
prompt = 'Password: '
pw = None
# If stdin is a tty, try prompting for the password
if hasattr(sys.stdin, 'isatty') and sys.stdin.isatty():
# Check for Ctl-D
try:
pw = getpass.getpass(prompt)
except EOFError:
pass
# No password because we did't have a tty or nothing was entered
if not pw:
raise exc.CommandError(
"No password entered, or found via --os-password or OS_PASSWORD",
)
return pw
class OpenStackShell(app.App):
CONSOLE_MESSAGE_FORMAT = '%(levelname)s: %(name)s %(message)s'
log = logging.getLogger(__name__)
timing_data = []
def __init__(self):
# Patch command.Command to add a default auth_required = True
command.Command.auth_required = True
command.Command.best_effort = False
# But not help
help.HelpCommand.auth_required = False
complete.CompleteCommand.best_effort = True
super(OpenStackShell, self).__init__(
description=__doc__.strip(),
version=openstackclient.__version__,
command_manager=commandmanager.CommandManager('openstack.cli'))
self.api_version = {}
# Until we have command line arguments parsed, dump any stack traces
self.dump_stack_trace = True
# This is instantiated in initialize_app() only when using
# password flow auth
self.auth_client = None
# Assume TLS host certificate verification is enabled
self.verify = True
self.client_manager = None
# NOTE(dtroyer): This hack changes the help action that Cliff
# automatically adds to the parser so we can defer
# its execution until after the api-versioned commands
# have been loaded. There doesn't seem to be a
# way to edit/remove anything from an existing parser.
# Replace the cliff-added help.HelpAction to defer its execution
self.DeferredHelpAction = None
for a in self.parser._actions:
if type(a) == help.HelpAction:
# Found it, save and replace it
self.DeferredHelpAction = a
# These steps are argparse-implementation-dependent
self.parser._actions.remove(a)
if self.parser._option_string_actions['-h']:
del self.parser._option_string_actions['-h']
if self.parser._option_string_actions['--help']:
del self.parser._option_string_actions['--help']
# Make a new help option to just set a flag
self.parser.add_argument(
'-h', '--help',
action='store_true',
dest='deferred_help',
default=False,
help="Show this help message and exit",
)
def configure_logging(self):
"""Configure logging for the app
Cliff sets some defaults we don't want so re-work it a bit
"""
if self.options.debug:
# --debug forces verbose_level 3
# Set this here so cliff.app.configure_logging() can work
self.options.verbose_level = 3
super(OpenStackShell, self).configure_logging()
root_logger = logging.getLogger('')
# Requests logs some stuff at INFO that we don't want
# unless we have DEBUG
requests_log = logging.getLogger("requests")
requests_log.setLevel(logging.ERROR)
# Other modules we don't want DEBUG output for so
# don't reset them below
iso8601_log = logging.getLogger("iso8601")
iso8601_log.setLevel(logging.ERROR)
# Set logging to the requested level
self.dump_stack_trace = False
if self.options.verbose_level == 0:
# --quiet
root_logger.setLevel(logging.ERROR)
elif self.options.verbose_level == 1:
# This is the default case, no --debug, --verbose or --quiet
root_logger.setLevel(logging.WARNING)
elif self.options.verbose_level == 2:
# One --verbose
root_logger.setLevel(logging.INFO)
elif self.options.verbose_level >= 3:
# Two or more --verbose
root_logger.setLevel(logging.DEBUG)
requests_log.setLevel(logging.DEBUG)
if self.options.debug:
# --debug forces traceback
self.dump_stack_trace = True
def run(self, argv):
try:
return super(OpenStackShell, self).run(argv)
except Exception as e:
if not logging.getLogger('').handlers:
logging.basicConfig()
if self.dump_stack_trace:
self.log.error(traceback.format_exc(e))
else:
self.log.error('Exception raised: ' + str(e))
return 1
def build_option_parser(self, description, version):
parser = super(OpenStackShell, self).build_option_parser(
description,
version)
# service token auth argument
parser.add_argument(
'--os-url',
metavar='<url>',
default=utils.env('OS_URL'),
help='Defaults to env[OS_URL]')
# Global arguments
parser.add_argument(
'--os-region-name',
metavar='<auth-region-name>',
default=utils.env('OS_REGION_NAME'),
help='Authentication region name (Env: OS_REGION_NAME)')
parser.add_argument(
'--os-cacert',
metavar='<ca-bundle-file>',
default=utils.env('OS_CACERT'),
help='CA certificate bundle file (Env: OS_CACERT)')
verify_group = parser.add_mutually_exclusive_group()
verify_group.add_argument(
'--verify',
action='store_true',
help='Verify server certificate (default)',
)
verify_group.add_argument(
'--insecure',
action='store_true',
help='Disable server certificate verification',
)
parser.add_argument(
'--os-default-domain',
metavar='<auth-domain>',
default=utils.env(
'OS_DEFAULT_DOMAIN',
default=DEFAULT_DOMAIN),
help='Default domain ID, default=' +
DEFAULT_DOMAIN +
' (Env: OS_DEFAULT_DOMAIN)')
parser.add_argument(
'--timing',
default=False,
action='store_true',
help="Print API call timing info",
)
return clientmanager.build_plugin_option_parser(parser)
def initialize_app(self, argv):
"""Global app init bits:
* set up API versions
* validate authentication info
* authenticate against Identity if requested
"""
super(OpenStackShell, self).initialize_app(argv)
# Save default domain
self.default_domain = self.options.os_default_domain
# Loop through extensions to get API versions
for mod in clientmanager.PLUGIN_MODULES:
version_opt = getattr(self.options, mod.API_VERSION_OPTION, None)
if version_opt:
api = mod.API_NAME
self.api_version[api] = version_opt
version = '.v' + version_opt.replace('.', '_')
cmd_group = 'openstack.' + api.replace('-', '_') + version
self.command_manager.add_command_group(cmd_group)
self.log.debug(
'%(name)s API version %(version)s, cmd group %(group)s',
{'name': api, 'version': version_opt, 'group': cmd_group}
)
# Commands that span multiple APIs
self.command_manager.add_command_group(
'openstack.common')
# This is the naive extension implementation referred to in
# blueprint 'client-extensions'
# Extension modules can register their commands in an
# 'openstack.extension' entry point group:
# entry_points={
# 'openstack.extension': [
# 'list_repo=qaz.github.repo:ListRepo',
# 'show_repo=qaz.github.repo:ShowRepo',
# ],
# }
self.command_manager.add_command_group(
'openstack.extension')
# call InitializeXxx() here
# set up additional clients to stuff in to client_manager??
# Handle deferred help and exit
if self.options.deferred_help:
self.DeferredHelpAction(self.parser, self.parser, None, None)
# Set up common client session
if self.options.os_cacert:
self.verify = self.options.os_cacert
else:
self.verify = not self.options.insecure
self.client_manager = clientmanager.ClientManager(
auth_options=self.options,
verify=self.verify,
api_version=self.api_version,
pw_func=prompt_for_password,
)
def prepare_to_run_command(self, cmd):
"""Set up auth and API versions"""
self.log.debug('prepare_to_run_command %s', cmd.__class__.__name__)
if cmd.auth_required and cmd.best_effort:
try:
# Trigger the Identity client to initialize
self.client_manager.auth_ref
except Exception:
pass
return
def clean_up(self, cmd, result, err):
self.log.debug('clean_up %s', cmd.__class__.__name__)
if err:
self.log.debug('got an error: %s', err)
# Process collected timing data
if self.options.timing:
# Loop through extensions
for mod in self.ext_modules:
client = getattr(self.client_manager, mod.API_NAME)
if hasattr(client, 'get_timings'):
self.timing_data.extend(client.get_timings())
# Use the Timing pseudo-command to generate the output
tcmd = timing.Timing(self, self.options)
tparser = tcmd.get_parser('Timing')
# If anything other than prettytable is specified, force csv
format = 'table'
# Check the formatter used in the actual command
if hasattr(cmd, 'formatter') \
and cmd.formatter != cmd._formatter_plugins['table'].obj:
format = 'csv'
sys.stdout.write('\n')
targs = tparser.parse_args(['-f', format])
tcmd.run(targs)
def main(argv=sys.argv[1:]):
return OpenStackShell().run(argv)
if __name__ == "__main__":
sys.exit(main(sys.argv[1:]))