text: """
  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.
  
  Ambari Agent
  
  """
  
  import nodemanager_upgrade
  
  from resource_management.libraries.script.script import Script
  from resource_management.libraries.functions.check_process_status import check_process_status
  from resource_management.libraries.functions.format import format
  from resource_management.libraries.functions.security_commons import build_expectations, \
      cached_kinit_executor, get_params_from_filesystem, validate_security_config_properties, \
      FILE_TYPE_XML
  from resource_management.core.logger import Logger
  from yarn import yarn, install_yarn
  from service import service
  from resource_management.core.resources.system import Execute
  
  
  class Nodemanager(Script):
      def install(self, env):
          self.install_packages(env)
          install_yarn()
  
      def stop(self, env):
          import params
          env.set_params(params)
          service('nodemanager', action='stop')
  
      def start(self, env):
          import params
          env.set_params(params)
          install_yarn()
          Execute(
              'chown -R ' + params.yarn_user + ':' + params.user_group + ' /sys/fs/cgroup/cpu/yarn /sys/fs/cgroup/memory/yarn /sys/fs/cgroup/blkio/yarn /sys/fs/cgroup/net_cls/yarn')
          Execute('chown root:hadoop ' + params.install_dir +
                  '/bin/container-executor')
          self.configure(env)  # FOR SECURITY
          service('nodemanager', action='start')
  
      def configure(self, env):
          import params
          env.set_params(params)
          yarn(name="nodemanager")
  
      def pre_upgrade_restart(self, env):
          Logger.info("Executing NodeManager Stack Upgrade pre-restart")
          import params
          env.set_params(params)
  
      def post_upgrade_restart(self, env):
          Logger.info("Executing NodeManager Stack Upgrade post-restart")
          import params
          env.set_params(params)
          nodemanager_upgrade.post_upgrade_check()
  
      def status(self, env):
          import status_params
          env.set_params(status_params)
          check_process_status(status_params.nodemanager_pid_file)
  
      def get_log_folder(self):
          import params
          return params.yarn_log_dir
  
      def get_user(self):
          import params
          return params.yarn_user
  
      def get_pid_files(self):
          import status_params
          return [status_params.nodemanager_pid_file]
  
  
  if __name__ == "__main__":
      Nodemanager().execute()
  