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
  
  """
  
  from resource_management.libraries.script.script import Script
  from resource_management.libraries.functions import stack_select
  from resource_management.libraries.functions import StackFeature
  from resource_management.libraries.functions.stack_features import check_stack_feature
  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.libraries.functions.decorator import retry
  from resource_management.core.resources.system import File, Execute
  from resource_management.core.source import Template
  from resource_management.core.logger import Logger
  from resource_management.core.exceptions import Fail
  from resource_management.libraries.providers.hdfs_resource import WebHDFSUtil
  from resource_management.libraries.providers.hdfs_resource import HdfsResourceProvider
  from resource_management import is_empty
  from resource_management import shell
  from resource_management.core.resources.zkmigrator import ZkMigrator
  from resource_management.libraries.functions import namenode_ha_utils
  
  from yarn import yarn
  from service import service
  from ambari_commons import OSConst
  from ambari_commons.os_family_impl import OsFamilyImpl
  from setup_ranger_yarn import setup_ranger_yarn
  
  
  class Resourcemanager(Script):
    def install(self, env):
      self.install_packages(env)
  
    def stop(self, env, upgrade_type=None):
      import params
      env.set_params(params)
      service('resourcemanager', action='stop')
  
    def configure(self, env):
      import params
      env.set_params(params)
      yarn(name='resourcemanager')
  
    def refreshqueues(self, env):
      pass
  
  
  
  @OsFamilyImpl(os_family=OSConst.WINSRV_FAMILY)
  class ResourcemanagerWindows(Resourcemanager):
    def start(self, env):
      import params
      env.set_params(params)
      self.configure(env)
      service('resourcemanager', action='start')
  
    def status(self, env):
      service('resourcemanager', action='status')
  
    def decommission(self, env):
      import params
  
      env.set_params(params)
      yarn_user = params.yarn_user
  
      yarn_refresh_cmd = format("cmd /c yarn rmadmin -refreshNodes")
  
      File(params.exclude_file_path,
           content=Template("exclude_hosts_list.j2"),
           owner=yarn_user,
           mode="f"
      )
  
      if params.include_hosts:
        File(params.include_file_path,
           content=Template("include_hosts_list.j2"),
           owner=yarn_user,
           mode="f"
      )
  
      if params.update_files_only == False:
        Execute(yarn_refresh_cmd, user=yarn_user)
  
  
  
  @OsFamilyImpl(os_family=OsFamilyImpl.DEFAULT)
  class ResourcemanagerDefault(Resourcemanager):
    def pre_upgrade_restart(self, env, upgrade_type=None):
      Logger.info("Executing Stack Upgrade post-restart")
      import params
      env.set_params(params)
  
      if params.version and check_stack_feature(StackFeature.ROLLING_UPGRADE, params.version):
        stack_select.select_packages(params.version)
  
    def start(self, env, upgrade_type=None):
      import params
  
      env.set_params(params)
      self.configure(env) # FOR SECURITY
      if params.enable_ranger_yarn and params.is_supported_yarn_ranger:
        setup_ranger_yarn() #Ranger Yarn Plugin related calls
  
      # wait for active-dir and done-dir to be created by ATS if needed
      if params.has_ats:
        Logger.info("Verifying DFS directories where ATS stores time line data for active and completed applications.")
        self.wait_for_dfs_directories_created(params.entity_groupfs_store_dir, params.entity_groupfs_active_dir)
  
      service('resourcemanager', action='start')
  
    def status(self, env):
      import status_params
  
      env.set_params(status_params)
      check_process_status(status_params.resourcemanager_pid_file)
      pass
  
    def refreshqueues(self, env):
      import params
  
      self.configure(env)
      env.set_params(params)
  
      service('resourcemanager',
              action='refreshQueues'
      )
  
    def decommission(self, env):
      import params
  
      env.set_params(params)
      rm_kinit_cmd = params.rm_kinit_cmd
      yarn_user = params.yarn_user
      conf_dir = params.hadoop_conf_dir
      user_group = params.user_group
  
      yarn_refresh_cmd = format("{rm_kinit_cmd} yarn --config {conf_dir} rmadmin -refreshNodes")
  
      File(params.exclude_file_path,
           content=Template("exclude_hosts_list.j2"),
           owner=yarn_user,
           group=user_group
      )
  
      if params.include_hosts:
        File(params.include_file_path,
             content=Template("include_hosts_list.j2"),
             owner=yarn_user,
             group=user_group
             )
  
      if params.update_files_only == False:
        Execute(yarn_refresh_cmd,
              environment= {'PATH' : params.execute_path },
              user=yarn_user)
        pass
      pass
  
    def disable_security(self, env):
      import params
      if not params.stack_supports_zk_security:
        Logger.info("Stack doesn't support zookeeper security")
        return
      if not params.rm_zk_address:
        Logger.info("No zookeeper connection string. Skipping reverting ACL")
        return
      zkmigrator = ZkMigrator(
        params.rm_zk_address, \
        params.java_exec, \
        params.java64_home, \
        params.yarn_jaas_file, \
        params.yarn_user)
      zkmigrator.set_acls(params.rm_zk_znode, 'world:anyone:crdwa')
      zkmigrator.set_acls(params.hadoop_registry_zk_root, 'world:anyone:crdwa')
      zkmigrator.delete_node(params.rm_zk_failover_znode)
  
    def wait_for_dfs_directories_created(self, *dirs):
      import params
  
      ignored_dfs_dirs = HdfsResourceProvider.get_ignored_resources_list(params.hdfs_resource_ignore_file)
  
      if params.security_enabled:
        Execute(params.rm_kinit_cmd,
                user=params.yarn_user
        )
        Execute(format("{kinit_path_local} -kt {hdfs_user_keytab} {hdfs_principal_name}"),
          user=params.hdfs_user
        )
  
      for dir_path in dirs:
        self.wait_for_dfs_directory_created(dir_path, ignored_dfs_dirs)
  
  
    @retry(times=8, sleep_time=20, backoff_factor=1, err_class=Fail)
    def wait_for_dfs_directory_created(self, dir_path, ignored_dfs_dirs):
      import params
  
  
      if not is_empty(dir_path):
        dir_path = HdfsResourceProvider.parse_path(dir_path)
  
        if dir_path in ignored_dfs_dirs:
          Logger.info("Skipping DFS directory '" + dir_path + "' as it's marked to be ignored.")
          return
  
        Logger.info("Verifying if DFS directory '" + dir_path + "' exists.")
  
        dir_exists = None
  
        nameservices = namenode_ha_utils.get_nameservices(params.hdfs_site)
        nameservice = None if not nameservices else nameservices[-1]
        
        if WebHDFSUtil.is_webhdfs_available(params.is_webhdfs_enabled, params.dfs_type):
          # check with webhdfs is much faster than executing hdfs dfs -test
          util = WebHDFSUtil(params.hdfs_site, nameservice, params.hdfs_user, params.security_enabled)
          list_status = util.run_command(dir_path, 'GETFILESTATUS', method='GET', ignore_status_codes=['404'], assertable_result=False)
          dir_exists = ('FileStatus' in list_status)
        else:
          # have to do time expensive hdfs dfs -d check.
          dfs_ret_code = shell.call(format("hdfs --config {hadoop_conf_dir} dfs -test -d " + dir_path), user=params.yarn_user)[0]
          dir_exists = not dfs_ret_code #dfs -test -d returns 0 in case the dir exists
  
        if not dir_exists:
          raise Fail("DFS directory '" + dir_path + "' does not exist !")
        else:
          Logger.info("DFS directory '" + dir_path + "' exists.")
  
    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.resourcemanager_pid_file]
    
  if __name__ == "__main__":
    Resourcemanager().execute()
  