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.
  
  """
  
  import os
  
  from resource_management.libraries.functions import conf_select
  from resource_management.libraries.functions import stack_select
  from resource_management.libraries.functions import default
  from resource_management.libraries.functions import format_jvm_option
  from resource_management.libraries.functions import format
  from resource_management.libraries.functions.version import format_stack_version, compare_versions
  from ambari_commons.os_check import OSCheck
  from resource_management.libraries.script.script import Script
  from resource_management.libraries.functions import get_kinit_path
  from resource_management.libraries.functions.get_not_managed_resources import get_not_managed_resources
  from resource_management.libraries.resources.hdfs_resource import HdfsResource
  
  config = Script.get_config()
  
  host_sys_prepped = default("/hostLevelParams/host_sys_prepped", False)
  
  stack_version_unformatted = config['hostLevelParams']['stack_version']
  stack_version_formatted = format_stack_version(stack_version_unformatted)
  
  dfs_type = default("/commandParams/dfs_type", "")
  hadoop_conf_dir = "/etc/hadoop/conf"
  
  component_list = default("/localComponents", [])
  
  hdfs_tmp_dir = config['configurations']['hadoop-env']['hdfs_tmp_dir']
  
  # hadoop default params
  mapreduce_libs_path = "/usr/lib/hadoop-mapreduce/*"
  
  hadoop_libexec_dir = stack_select.get_hadoop_dir("libexec")
  hadoop_lib_home = stack_select.get_hadoop_dir("lib")
  hadoop_bin = stack_select.get_hadoop_dir("sbin")
  hadoop_home = '/usr'
  create_lib_snappy_symlinks = True
  
  current_service = config['serviceName']
  
  #security params
  security_enabled = config['configurations']['cluster-env']['security_enabled']
  
  #users and groups
  has_hadoop_env = 'hadoop-env' in config['configurations']
  mapred_user = config['configurations']['mapred-env']['mapred_user']
  hdfs_user = config['configurations']['hadoop-env']['hdfs_user']
  yarn_user = config['configurations']['yarn-env']['yarn_user']
  
  user_group = config['configurations']['cluster-env']['user_group']
  
  #hosts
  hostname = config["hostname"]
  ambari_server_hostname = config['clusterHostInfo']['ambari_server_host'][0]
  rm_host = default("/clusterHostInfo/rm_host", [])
  slave_hosts = default("/clusterHostInfo/slave_hosts", [])
  oozie_servers = default("/clusterHostInfo/oozie_server", [])
  hcat_server_hosts = default("/clusterHostInfo/webhcat_server_host", [])
  hive_server_host =  default("/clusterHostInfo/hive_server_host", [])
  hbase_master_hosts = default("/clusterHostInfo/hbase_master_hosts", [])
  hs_host = default("/clusterHostInfo/hs_host", [])
  jtnode_host = default("/clusterHostInfo/jtnode_host", [])
  namenode_host = default("/clusterHostInfo/namenode_host", [])
  zk_hosts = default("/clusterHostInfo/zookeeper_hosts", [])
  ganglia_server_hosts = default("/clusterHostInfo/ganglia_server_host", [])
  ams_collector_hosts = default("/clusterHostInfo/metrics_collector_hosts", [])
  
  has_namenode = not len(namenode_host) == 0
  has_resourcemanager = not len(rm_host) == 0
  has_slaves = not len(slave_hosts) == 0
  has_oozie_server = not len(oozie_servers) == 0
  has_hcat_server_host = not len(hcat_server_hosts) == 0
  has_hive_server_host = not len(hive_server_host) == 0
  has_hbase_masters = not len(hbase_master_hosts) == 0
  has_zk_host = not len(zk_hosts) == 0
  has_ganglia_server = not len(ganglia_server_hosts) == 0
  has_metric_collector = not len(ams_collector_hosts) == 0
  
  is_namenode_master = hostname in namenode_host
  is_jtnode_master = hostname in jtnode_host
  is_rmnode_master = hostname in rm_host
  is_hsnode_master = hostname in hs_host
  is_hbase_master = hostname in hbase_master_hosts
  is_slave = hostname in slave_hosts
  if has_ganglia_server:
    ganglia_server_host = ganglia_server_hosts[0]
  if has_metric_collector:
    if 'cluster-env' in config['configurations'] and \
        'metrics_collector_vip_host' in config['configurations']['cluster-env']:
      metric_collector_host = config['configurations']['cluster-env']['metrics_collector_vip_host']
    else:
      metric_collector_host = ams_collector_hosts[0]
    if 'cluster-env' in config['configurations'] and \
        'metrics_collector_vip_port' in config['configurations']['cluster-env']:
      metric_collector_port = config['configurations']['cluster-env']['metrics_collector_vip_port']
    else:
      metric_collector_web_address = default("/configurations/ams-site/timeline.metrics.service.webapp.address", "localhost:6188")
      if metric_collector_web_address.find(':') != -1:
        metric_collector_port = metric_collector_web_address.split(':')[1]
      else:
        metric_collector_port = '6188'
    if default("/configurations/ams-site/timeline.metrics.service.http.policy", "HTTP_ONLY") == "HTTPS_ONLY":
      metric_collector_protocol = 'https'
    else:
      metric_collector_protocol = 'http'
    metric_truststore_path= default("/configurations/ams-ssl-client/ssl.client.truststore.location", "")
    metric_truststore_type= default("/configurations/ams-ssl-client/ssl.client.truststore.type", "")
    metric_truststore_password= default("/configurations/ams-ssl-client/ssl.client.truststore.password", "")
  
    pass
  metrics_report_interval = default("/configurations/ams-site/timeline.metrics.sink.report.interval", 60)
  metrics_collection_period = default("/configurations/ams-site/timeline.metrics.sink.collection.period", 10)
  
  #hadoop params
  
  if has_namenode or dfs_type == 'HCFS':
    hadoop_tmp_dir = format("/tmp/hadoop-{hdfs_user}")
    hadoop_conf_dir = conf_select.get_hadoop_conf_dir()
    task_log4j_properties_location = os.path.join(hadoop_conf_dir, "task-log4j.properties")
  
  hadoop_pid_dir_prefix = config['configurations']['hadoop-env']['hadoop_pid_dir_prefix']
  hdfs_log_dir_prefix = config['configurations']['hadoop-env']['hdfs_log_dir_prefix']
  hbase_tmp_dir = "/tmp/hbase-hbase"
  #db params
  server_db_name = config['hostLevelParams']['db_name']
  db_driver_filename = config['hostLevelParams']['db_driver_filename']
  oracle_driver_url = config['hostLevelParams']['oracle_jdbc_url']
  mysql_driver_url = config['hostLevelParams']['mysql_jdbc_url']
  ambari_server_resources = config['hostLevelParams']['jdk_location']
  oracle_driver_symlink_url = format("{ambari_server_resources}oracle-jdbc-driver.jar")
  mysql_driver_symlink_url = format("{ambari_server_resources}mysql-jdbc-driver.jar")
  
  ambari_db_rca_url = config['hostLevelParams']['ambari_db_rca_url'][0]
  ambari_db_rca_driver = config['hostLevelParams']['ambari_db_rca_driver'][0]
  ambari_db_rca_username = config['hostLevelParams']['ambari_db_rca_username'][0]
  ambari_db_rca_password = config['hostLevelParams']['ambari_db_rca_password'][0]
  
  if has_namenode and 'rca_enabled' in config['configurations']['hadoop-env']:
    rca_enabled =  config['configurations']['hadoop-env']['rca_enabled']
  else:
    rca_enabled = False
  rca_disabled_prefix = "###"
  if rca_enabled == True:
    rca_prefix = ""
  else:
    rca_prefix = rca_disabled_prefix
  
  #hadoop-env.sh
  java_home = config['hostLevelParams']['java_home']
  
  jsvc_path = "/usr/lib/bigtop-utils"
  
  hadoop_heapsize = config['configurations']['hadoop-env']['hadoop_heapsize']
  namenode_heapsize = config['configurations']['hadoop-env']['namenode_heapsize']
  namenode_opt_newsize = config['configurations']['hadoop-env']['namenode_opt_newsize']
  namenode_opt_maxnewsize = config['configurations']['hadoop-env']['namenode_opt_maxnewsize']
  namenode_opt_permsize = format_jvm_option("/configurations/hadoop-env/namenode_opt_permsize","128m")
  namenode_opt_maxpermsize = format_jvm_option("/configurations/hadoop-env/namenode_opt_maxpermsize","256m")
  
  jtnode_opt_newsize = "200m"
  jtnode_opt_maxnewsize = "200m"
  jtnode_heapsize =  "1024m"
  ttnode_heapsize = "1024m"
  
  dtnode_heapsize = config['configurations']['hadoop-env']['dtnode_heapsize']
  mapred_pid_dir_prefix = default("/configurations/mapred-env/mapred_pid_dir_prefix","/var/run/hadoop-mapreduce")
  mapred_log_dir_prefix = default("/configurations/mapred-env/mapred_log_dir_prefix","/var/log/hadoop-mapreduce")
  
  #log4j.properties
  
  yarn_log_dir_prefix = default("/configurations/yarn-env/yarn_log_dir_prefix","/var/log/hadoop-yarn")
  
  dfs_hosts = default('/configurations/hdfs-site/dfs.hosts', None)
  
  #log4j.properties
  if (('hdfs-log4j' in config['configurations']) and ('content' in config['configurations']['hdfs-log4j'])):
    log4j_props = config['configurations']['hdfs-log4j']['content']
    if (('yarn-log4j' in config['configurations']) and ('content' in config['configurations']['yarn-log4j'])):
      log4j_props += config['configurations']['yarn-log4j']['content']
  else:
    log4j_props = None
  
  refresh_topology = False
  command_params = config["commandParams"] if "commandParams" in config else None
  if command_params is not None:
    refresh_topology = bool(command_params["refresh_topology"]) if "refresh_topology" in command_params else False
  
  ambari_libs_dir = "/var/lib/ambari-agent/lib"
  is_webhdfs_enabled = config['configurations']['hdfs-site']['dfs.webhdfs.enabled']
  default_fs = config['configurations']['core-site']['fs.defaultFS']
  
  #host info
  all_hosts = default("/clusterHostInfo/all_hosts", [])
  all_racks = default("/clusterHostInfo/all_racks", [])
  all_ipv4_ips = default("/clusterHostInfo/all_ipv4_ips", [])
  slave_hosts = default("/clusterHostInfo/slave_hosts", [])
  
  #topology files
  net_topology_script_file_path = "/etc/hadoop/conf/topology_script.py"
  net_topology_script_dir = os.path.dirname(net_topology_script_file_path)
  net_topology_mapping_data_file_name = 'topology_mappings.data'
  net_topology_mapping_data_file_path = os.path.join(net_topology_script_dir, net_topology_mapping_data_file_name)
  
  #Added logic to create /tmp and /user directory for HCFS stack.
  has_core_site = 'core-site' in config['configurations']
  hdfs_user_keytab = config['configurations']['hadoop-env']['hdfs_user_keytab']
  kinit_path_local = get_kinit_path()
  stack_version_unformatted = config['hostLevelParams']['stack_version']
  stack_version_formatted = format_stack_version(stack_version_unformatted)
  hadoop_bin_dir = stack_select.get_hadoop_dir("bin")
  hdfs_principal_name = default('/configurations/hadoop-env/hdfs_principal_name', None)
  hdfs_site = config['configurations']['hdfs-site']
  default_fs = config['configurations']['core-site']['fs.defaultFS']
  smoke_user =  config['configurations']['cluster-env']['smokeuser']
  smoke_hdfs_user_dir = format("/user/{smoke_user}")
  smoke_hdfs_user_mode = 0770
  
  
  ##### Namenode RPC ports - metrics config section start #####
  
  # Figure out the rpc ports for current namenode
  nn_rpc_client_port = None
  nn_rpc_dn_port = None
  nn_rpc_healthcheck_port = None
  
  namenode_id = None
  namenode_rpc = None
  
  dfs_ha_enabled = False
  dfs_ha_nameservices = default('/configurations/hdfs-site/dfs.internal.nameservices', None)
  if dfs_ha_nameservices is None:
    dfs_ha_nameservices = default('/configurations/hdfs-site/dfs.nameservices', None)
  dfs_ha_namenode_ids = default(format("/configurations/hdfs-site/dfs.ha.namenodes.{dfs_ha_nameservices}"), None)
  
  dfs_ha_namemodes_ids_list = []
  other_namenode_id = None
  
  if dfs_ha_namenode_ids:
   dfs_ha_namemodes_ids_list = dfs_ha_namenode_ids.split(",")
   dfs_ha_namenode_ids_array_len = len(dfs_ha_namemodes_ids_list)
   if dfs_ha_namenode_ids_array_len > 1:
     dfs_ha_enabled = True
  
  if dfs_ha_enabled:
   for nn_id in dfs_ha_namemodes_ids_list:
     nn_host = config['configurations']['hdfs-site'][format('dfs.namenode.rpc-address.{dfs_ha_nameservices}.{nn_id}')]
     if hostname in nn_host:
       namenode_id = nn_id
       namenode_rpc = nn_host
     pass
   pass
  else:
   namenode_rpc = default('/configurations/hdfs-site/dfs.namenode.rpc-address', None)
  
  if namenode_rpc:
   nn_rpc_client_port = namenode_rpc.split(':')[1].strip()
  
  if dfs_ha_enabled:
   dfs_service_rpc_address = default(format('/configurations/hdfs-site/dfs.namenode.servicerpc-address.{dfs_ha_nameservices}.{namenode_id}'), None)
   dfs_lifeline_rpc_address = default(format('/configurations/hdfs-site/dfs.namenode.lifeline.rpc-address.{dfs_ha_nameservices}.{namenode_id}'), None)
  else:
   dfs_service_rpc_address = default('/configurations/hdfs-site/dfs.namenode.servicerpc-address', None)
   dfs_lifeline_rpc_address = default(format('/configurations/hdfs-site/dfs.namenode.lifeline.rpc-address'), None)
  
  if dfs_service_rpc_address:
   nn_rpc_dn_port = dfs_service_rpc_address.split(':')[1].strip()
  
  if dfs_lifeline_rpc_address:
   nn_rpc_healthcheck_port = dfs_lifeline_rpc_address.split(':')[1].strip()
  
  is_nn_client_port_configured = False if nn_rpc_client_port is None else True
  is_nn_dn_port_configured = False if nn_rpc_dn_port is None else True
  is_nn_healthcheck_port_configured = False if nn_rpc_healthcheck_port is None else True
  
  ##### end #####
  
  import functools
  #create partial functions with common arguments for every HdfsResource call
  #to create/delete/copyfromlocal hdfs directories/files we need to call params.HdfsResource in code
  HdfsResource = functools.partial(
    HdfsResource,
    user=hdfs_user,
    hdfs_resource_ignore_file = "/var/lib/ambari-agent/data/.hdfs_resource_ignore",
    security_enabled = security_enabled,
    keytab = hdfs_user_keytab,
    kinit_path_local = kinit_path_local,
    hadoop_bin_dir = hadoop_bin_dir,
    hadoop_conf_dir = hadoop_conf_dir,
    principal_name = hdfs_principal_name,
    hdfs_site = hdfs_site,
    default_fs = default_fs,
    immutable_paths = get_not_managed_resources(),
    dfs_type = dfs_type
  )
  