entrypoint.py 6.45 KB
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# Copyright (c) 2016, Daniele Venzano
#
# 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.

"""
This module contains the entrypoint for the commandline Zoe client
"""

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import datetime
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import json
import logging
import os
import sys
from argparse import ArgumentParser, Namespace, FileType, RawDescriptionHelpFormatter
from pprint import pprint

from zoe_cmd import utils
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from zoe_lib.services import ZoeServiceAPI
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from zoe_lib.exceptions import ZoeAPIException, InvalidApplicationDescription
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from zoe_lib.executions import ZoeExecutionsAPI
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from zoe_lib.applications import app_validate
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def app_validate_cmd(args):
    app_descr = json.load(args.jsonfile)
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    try:
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        app_validate(app_descr)
    except InvalidApplicationDescription as e:
        print(e)
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    else:
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        print("Static validation OK")
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def app_get_cmd(args):
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    exec_api = ZoeExecutionsAPI(utils.zoe_url(), utils.zoe_user(), utils.zoe_pass())
    execution = exec_api.execution_get(args.id)
    if execution is None:
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        print("no such execution")
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    else:
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        json.dump(execution['description'], sys.stdout, sort_keys=True, indent=4)
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def exec_list_cmd(_):
    exec_api = ZoeExecutionsAPI(utils.zoe_url(), utils.zoe_user(), utils.zoe_pass())
    data = exec_api.list()
    for e in data:
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        print('Execution {} (User: {}, ID: {}): {}'.format(e['name'], e['user_id'], e['id'], e['status']))
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def exec_start_cmd(args):
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    app_descr = json.load(args.jsonfile)
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    app_validate(app_descr)
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    exec_api = ZoeExecutionsAPI(utils.zoe_url(), utils.zoe_user(), utils.zoe_pass())
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    ret = exec_api.execution_start(args.name, app_descr)
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    print("Application scheduled successfully with ID {}, use the exec-get command to check its status".format(ret))


def exec_get_cmd(args):
    exec_api = ZoeExecutionsAPI(utils.zoe_url(), utils.zoe_user(), utils.zoe_pass())
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    cont_api = ZoeServiceAPI(utils.zoe_url(), utils.zoe_user(), utils.zoe_pass())
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    execution = exec_api.execution_get(args.id)
    if execution is None:
        print('Execution not found')
    else:
        print('Execution {} (ID: {})'.format(execution['name'], execution['id']))
        print('Status: {}'.format(execution['status']))
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        if execution['status'] == 'error':
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            print('Last error: {}'.format(execution['error']))
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        print('Time submit: {}'.format(datetime.datetime.fromtimestamp(execution['time_submit'])))

        if execution['time_start'] is None:
            print('Time start: {}'.format('not yet'))
        else:
            print('Time start: {}'.format(datetime.datetime.fromtimestamp(execution['time_start'])))

        if execution['time_end'] is None:
            print('Time end: {}'.format('not yet'))
        else:
            print('Time end: {}'.format(datetime.datetime.fromtimestamp(execution['time_end'])))

        app = execution['description']
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        print('Application name: {}'.format(app['name']))
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        for c_id in execution['services']:
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            c = cont_api.get(c_id)
            ip = list(c['ip_address'].values())[0]  # FIXME how to decide which network is the right one?
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            print('Service {} (ID: {})'.format(c['name'], c['id']))
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            for p in c['ports']:
                print(' - {}: {}://{}:{}{}'.format(p['name'], p['protocol'], ip, p['port_number'], p['path']))


def exec_kill_cmd(args):
    exec_api = ZoeExecutionsAPI(utils.zoe_url(), utils.zoe_user(), utils.zoe_pass())
    exec_api.terminate(args.id)


ENV_HELP_TEXT = '''To use this tool you need also to define three environment variables:
ZOE_URL: point to the URL of the Zoe Scheduler (ex.: http://localhost:5000/
ZOE_USER: the username used for authentication
ZOE_PASS: the password used for authentication'''


def process_arguments() -> Namespace:
    parser = ArgumentParser(description="Zoe command-line client", epilog=ENV_HELP_TEXT, formatter_class=RawDescriptionHelpFormatter)
    parser.add_argument('--debug', action='store_true', help='Enable debug output')

    subparser = parser.add_subparsers()

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    argparser_app_validate = subparser.add_parser('app-validate', help='Validate an application description')
    argparser_app_validate.add_argument('jsonfile', type=FileType("r"), help='Application description')
    argparser_app_validate.set_defaults(func=app_validate_cmd)
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    argparser_exec_start = subparser.add_parser('start', help="Start an application")
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    argparser_exec_start.add_argument('name', help="Name of the execution")
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    argparser_exec_start.add_argument('jsonfile', type=FileType("r"), help='Application description')
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    argparser_exec_start.set_defaults(func=exec_start_cmd)

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    argparser_app_list = subparser.add_parser('exec-ls', help="List all executions for the calling user")
    argparser_app_list.set_defaults(func=exec_list_cmd)

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    argparser_execution_get = subparser.add_parser('exec-get', help="Get execution status")
    argparser_execution_get.add_argument('id', type=int, help="Execution id")
    argparser_execution_get.set_defaults(func=exec_get_cmd)

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    argparser_app_get = subparser.add_parser('exec-app-get', help="Retrieve an already defined application description")
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    argparser_app_get.add_argument('id', help='The ID of the application')
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    argparser_app_get.set_defaults(func=app_get_cmd)
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    argparser_execution_kill = subparser.add_parser('terminate', help="Terminates an execution")
    argparser_execution_kill.add_argument('id', type=int, help="Execution id")
    argparser_execution_kill.set_defaults(func=exec_kill_cmd)

    return parser, parser.parse_args()


def zoe():
    parser, args = process_arguments()
    if args.debug:
        logging.basicConfig(level=logging.DEBUG)
    else:
        logging.basicConfig(level=logging.INFO)
    logging.getLogger("requests").setLevel(logging.WARNING)

    if not hasattr(args, "func"):
        parser.print_help()
        return

    if 'ZOE_URL' not in os.environ or 'ZOE_USER' not in os.environ or 'ZOE_PASS' not in os.environ:
        parser.print_help()
        return

    try:
        args.func(args)
    except ZoeAPIException as e:
        print(e.message)
    sys.exit(0)