text: #!/usr/bin/python3
  
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  # Licensed to the Apache Software Foundation (ASF) under one
  # or more contributor license agreements.  See the NOTICE file
  # distributed with this work for additional information
  # regarding copyright ownership.  The ASF licenses this file
  # to you 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.
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  # ******************************************************************************
  
  import datalab.actions_lib
  import datalab.fab
  import datalab.meta_lib
  import json
  import logging
  import os
  import sys
  import traceback
  
  
  def terminate_nb(resource_group_name, notebook_name):
      print("Terminating data engine cluster")
      try:
          for vm in AzureMeta.compute_client.virtual_machines.list(resource_group_name):
              if "notebook_name" in vm.tags:
                  if notebook_name == vm.tags['notebook_name']:
                      AzureActions.remove_instance(resource_group_name, vm.name)
                      print("Instance {} has been terminated".format(vm.name))
      except Exception as err:
          datalab.fab.append_result("Failed to terminate clusters", str(err))
          sys.exit(1)
  
      print("Terminating notebook")
      try:
          for vm in AzureMeta.compute_client.virtual_machines.list(resource_group_name):
              if "Name" in vm.tags:
                  if notebook_name == vm.tags["Name"]:
                      AzureActions.remove_instance(resource_group_name, vm.name)
                      print("Instance {} has been terminated".format(vm.name))
      except Exception as err:
          datalab.fab.append_result("Failed to terminate instance", str(err))
          sys.exit(1)
  
  
  if __name__ == "__main__":
      local_log_filename = "{}_{}_{}.log".format(os.environ['conf_resource'], os.environ['project_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
      AzureMeta = datalab.meta_lib.AzureMeta()
      AzureActions = datalab.actions_lib.AzureActions()
      print('Generating infrastructure names and tags')
      notebook_config = dict()
      if 'exploratory_name' in os.environ:
          notebook_config['exploratory_name'] = os.environ['exploratory_name']
      else:
          notebook_config['exploratory_name'] = ''
      if 'computational_name' in os.environ:
          notebook_config['computational_name'] = os.environ['computational_name']
      else:
          notebook_config['computational_name'] = ''
      notebook_config['resource_group_name'] = os.environ['azure_resource_group_name']
      notebook_config['notebook_name'] = os.environ['notebook_instance_name']
  
      try:
          logging.info('[TERMINATE NOTEBOOK]')
          print('[TERMINATE NOTEBOOK]')
          try:
              terminate_nb(notebook_config['resource_group_name'], notebook_config['notebook_name'])
          except Exception as err:
              traceback.print_exc()
              datalab.fab.append_result("Failed to terminate notebook.", str(err))
              raise Exception
      except:
          sys.exit(1)
  
      try:
          with open("/root/result.json", 'w') as result:
              res = {"notebook_name": notebook_config['notebook_name'],
                     "Action": "Terminate notebook server"}
              print(json.dumps(res))
              result.write(json.dumps(res))
      except Exception as err:
          datalab.fab.append_result("Error with writing results", str(err))
          sys.exit(1)
  