summaryrefslogtreecommitdiff
path: root/ceilometerclient/shell.py
blob: f98804ca22aabd73643c1adbc8f5e108730a132b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
#    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 Telemetry API.
"""

from __future__ import print_function

import argparse
import logging
import sys

from oslo_utils import encodeutils
from oslo_utils import importutils
import six

import ceilometerclient
from ceilometerclient import client as ceiloclient
from ceilometerclient.common import utils
from ceilometerclient import exc


def _positive_non_zero_int(argument_value):
    if argument_value is None:
        return None
    try:
        value = int(argument_value)
    except ValueError:
        msg = "%s must be an integer" % argument_value
        raise argparse.ArgumentTypeError(msg)
    if value <= 0:
        msg = "%s must be greater than 0" % argument_value
        raise argparse.ArgumentTypeError(msg)
    return value


class CeilometerShell(object):

    def __init__(self):
        self.auth_plugin = ceiloclient.AuthPlugin()

    def get_base_parser(self):
        parser = argparse.ArgumentParser(
            prog='ceilometer',
            description=__doc__.strip(),
            epilog='See "ceilometer 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('--version',
                            action='version',
                            version=ceilometerclient.__version__)

        parser.add_argument('-d', '--debug',
                            default=bool(utils.env('CEILOMETERCLIENT_DEBUG')
                                         ),
                            action='store_true',
                            help='Defaults to env[CEILOMETERCLIENT_DEBUG].')

        parser.add_argument('-v', '--verbose',
                            default=False, action="store_true",
                            help="Print more verbose output.")

        parser.add_argument('--timeout',
                            default=600,
                            type=_positive_non_zero_int,
                            help='Number of seconds to wait for a response.')

        parser.add_argument('--ceilometer-url', metavar='<CEILOMETER_URL>',
                            dest='os_endpoint',
                            default=utils.env('CEILOMETER_URL'),
                            help=("DEPRECATED, use --os-endpoint instead. "
                                  "Defaults to env[CEILOMETER_URL]."))

        parser.add_argument('--ceilometer_url',
                            dest='os_endpoint',
                            help=argparse.SUPPRESS)

        parser.add_argument('--ceilometer-api-version',
                            default=utils.env(
                                'CEILOMETER_API_VERSION', default='2'),
                            help='Defaults to env[CEILOMETER_API_VERSION] '
                            'or 2.')

        parser.add_argument('--ceilometer_api_version',
                            help=argparse.SUPPRESS)

        self.auth_plugin.add_opts(parser)
        self.auth_plugin.add_common_opts(parser)

        return parser

    def get_subcommand_parser(self, version):
        parser = self.get_base_parser()

        self.subcommands = {}
        subparsers = parser.add_subparsers(metavar='<subcommand>')
        submodule = importutils.import_versioned_module('ceilometerclient',
                                                        version, 'shell')
        self._find_actions(subparsers, submodule)
        self._find_actions(subparsers, self)
        self._add_bash_completion_subparser(subparsers)

        return parser

    def _add_bash_completion_subparser(self, subparsers):
        subparser = subparsers.add_parser(
            'bash_completion',
            add_help=False,
            formatter_class=HelpFormatter
        )
        self.subcommands['bash_completion'] = subparser
        subparser.set_defaults(func=self.do_bash_completion)

    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)

    @staticmethod
    def _setup_logging(debug):
        format = '%(levelname)s (%(module)s) %(message)s'
        if debug:
            logging.basicConfig(format=format, level=logging.DEBUG)
        else:
            logging.basicConfig(format=format, level=logging.WARN)
        logging.getLogger('iso8601').setLevel(logging.WARNING)
        logging.getLogger('urllib3.connectionpool').setLevel(logging.WARNING)

    def parse_args(self, argv):
        # Parse args once to find version
        parser = self.get_base_parser()
        (options, args) = parser.parse_known_args(argv)
        self.auth_plugin.parse_opts(options)
        self._setup_logging(options.debug)

        # build available subcommands based on version
        api_version = options.ceilometer_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

        # Return parsed args
        return api_version, subcommand_parser.parse_args(argv)

    @staticmethod
    def no_project_and_domain_set(args):
        if not (args.os_project_id or (args.os_project_name and
                (args.os_user_domain_name or args.os_user_domain_id)) or
                (args.os_tenant_id or args.os_tenant_name)):
            return True
        else:
            return False

    def main(self, argv):
        parsed = self.parse_args(argv)
        if parsed == 0:
            return 0
        api_version, args = parsed

        # Short-circuit and deal with help command right away.
        if args.func == self.do_help:
            self.do_help(args)
            return 0
        elif args.func == self.do_bash_completion:
            self.do_bash_completion(args)
            return 0

        if not ((self.auth_plugin.opts.get('token')
                 or self.auth_plugin.opts.get('auth_token'))
                and self.auth_plugin.opts['endpoint']):
            if not self.auth_plugin.opts['username']:
                raise exc.CommandError("You must provide a username via "
                                       "either --os-username or via "
                                       "env[OS_USERNAME]")

            if not self.auth_plugin.opts['password']:
                raise exc.CommandError("You must provide a password via "
                                       "either --os-password or via "
                                       "env[OS_PASSWORD]")

            if self.no_project_and_domain_set(args):
                # steer users towards Keystone V3 API
                raise exc.CommandError("You must provide a project_id via "
                                       "either --os-project-id or via "
                                       "env[OS_PROJECT_ID] and "
                                       "a domain_name via either "
                                       "--os-user-domain-name or via "
                                       "env[OS_USER_DOMAIN_NAME] or "
                                       "a domain_id via either "
                                       "--os-user-domain-id or via "
                                       "env[OS_USER_DOMAIN_ID]")

            if not self.auth_plugin.opts['auth_url']:
                raise exc.CommandError("You must provide an auth url via "
                                       "either --os-auth-url or via "
                                       "env[OS_AUTH_URL]")

        client_kwargs = vars(args)
        client_kwargs.update(self.auth_plugin.opts)
        client_kwargs['auth_plugin'] = self.auth_plugin
        client = ceiloclient.get_client(api_version, **client_kwargs)
        # call whatever callback was selected
        try:
            args.func(client, args)
        except exc.HTTPUnauthorized:
            raise exc.CommandError("Invalid OpenStack Identity credentials.")

    def do_bash_completion(self, args):
        """Prints all of the commands and options to stdout.

        The ceilometer.bash_completion script doesn't have to hard code them.
        """
        commands = set()
        options = set()
        for sc_str, sc in self.subcommands.items():
            commands.add(sc_str)
            for option in list(sc._optionals._option_string_actions):
                options.add(option)

        commands.remove('bash-completion')
        commands.remove('bash_completion')
        print(' '.join(commands | options))

    @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 __init__(self, prog, indent_increment=2, max_help_position=32,
                 width=None):
        super(HelpFormatter, self).__init__(prog, indent_increment,
                                            max_help_position, width)

    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(args=None):
    try:
        if args is None:
            args = sys.argv[1:]

        CeilometerShell().main(args)

    except Exception as e:
        if '--debug' in args or '-d' in args:
            raise
        else:
            print(encodeutils.safe_encode(six.text_type(e)), file=sys.stderr)
        sys.exit(1)
    except KeyboardInterrupt:
        print("Stopping Ceilometer Client", file=sys.stderr)
        sys.exit(130)

if __name__ == "__main__":
    main()