infrastructure-provisioning/src/general/scripts/gcp/dataengine_terminate.py

#!/usr/bin/python

# *****************************************************************************
#
# Copyright (c) 2016, EPAM SYSTEMS INC
#
# 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.
#
# ******************************************************************************

import logging
import json
import sys
from dlab.fab import *
from dlab.meta_lib import *
from dlab.actions_lib import *
import os
import uuid


def terminate_data_engine(zone, notebook_name, os_user, key_path, cluster_name):
    print("Terminating data engine cluster")
    try:
        instances = GCPMeta().get_list_instances(zone, cluster_name)
        if 'items' in instances:
            for i in instances['items']:
                GCPActions().remove_instance(i['name'], zone)
    except Exception as err:
        print('Error: {0}'.format(err))
        sys.exit(1)

    print("Removing Data Engine kernels from notebook")
    try:
        remove_dataengine_kernels(notebook_name, os_user, key_path, cluster_name)
    except Exception as err:
        print('Error: {0}'.format(err))
        sys.exit(1)


if __name__ == "__main__":
    local_log_filename = "{}_{}_{}.log".format(os.environ['conf_resource'], os.environ['edge_user_name'],
                                               os.environ['request_id'])
    local_log_filepath = "/logs/" + os.environ['conf_resource'] + "/" + local_log_filename
    logging.basicConfig(format='%(levelname)-8s [%(asctime)s]  %(message)s',
                        level=logging.DEBUG,
                        filename=local_log_filepath)
    # generating variables dictionary
    print('Generating infrastructure names and tags')
    data_engine = dict()
    try:
        data_engine['exploratory_name'] = os.environ['exploratory_name'].lower().replace('_', '-')
    except:
        data_engine['exploratory_name'] = ''
    try:
        data_engine['computational_name'] = os.environ['computational_name'].lower().replace('_', '-')
    except:
        data_engine['computational_name'] = ''
    data_engine['service_base_name'] = os.environ['conf_service_base_name']
    data_engine['zone'] = os.environ['gcp_zone']
    data_engine['user_name'] = os.environ['edge_user_name'].replace('_', '-')
    data_engine['cluster_name'] = \
        data_engine['service_base_name'] + '-' + data_engine['user_name'] + '-de-' + \
        data_engine['exploratory_name'] + '-' + data_engine['computational_name']
    data_engine['notebook_name'] = os.environ['notebook_instance_name']
    data_engine['key_path'] = os.environ['conf_key_dir'] + '/' + os.environ['conf_key_name'] + '.pem'


    try:
        logging.info('[TERMINATE DATA ENGINE]')
        print('[TERMINATE DATA ENGINE]')
        try:
            terminate_data_engine(data_engine['zone'], data_engine['notebook_name'], os.environ['conf_os_user'],
                                  data_engine['key_path'], data_engine['cluster_name'])
        except Exception as err:
            traceback.print_exc()
            append_result("Failed to terminate Data Engine.", str(err))
            raise Exception
    except:
        sys.exit(1)

    try:
        with open("/root/result.json", 'w') as result:
            res = {"service_base_name": data_engine['service_base_name'],
                   "Action": "Terminate Data Engine"}
            print(json.dumps(res))
            result.write(json.dumps(res))
    except:
        print("Failed writing results.")
        sys.exit(0)