new_contents: #!/usr/bin/python3.5
  import os
  import sys
  import traceback
  
  from indy_common.config_util import getConfig
  from indy_common.config_helper import NodeConfigHelper
  
  from ledger.compact_merkle_tree import CompactMerkleTree
  
  from plenum.common.stack_manager import TxnStackManager
  from plenum.common.ledger import Ledger
  from stp_core.common.log import getlogger
  from storage.helper import initHashStore
  
  logger = getlogger()
  
  ENV_FILE_PATH = "/etc/indy/indy.env"
  
  
  def get_node_name():
      node_name = None
      node_name_key = 'NODE_NAME'
  
      if os.path.exists(ENV_FILE_PATH):
          with open(ENV_FILE_PATH, "r") as fenv:
              for line in fenv.readlines():
                  if line.find(node_name_key) != -1:
                      node_name = line.split('=')[1].strip()
                      break
      else:
          logger.error("Path to env file does not exist")
  
      return node_name
  
  def append_ips_to_env(node_ip):
      node_ip_key = 'NODE_IP'
      client_ip_key = 'CLIENT_IP'
      with open(ENV_FILE_PATH, "a") as fenv:
          fenv.write("\n{}={}\n".format(node_ip_key, node_ip))
          fenv.write("{}={}\n".format(client_ip_key, "0.0.0.0"))
  
  def migrate_all():
      node_name = get_node_name()
      if node_name is None:
          logger.error("Could not get node name")
          return False
  
      config = getConfig()
      config_helper = NodeConfigHelper(node_name, config)
  
      hash_store = initHashStore(config_helper.ledger_dir, "pool", config, read_only=True)
      ledger = Ledger(CompactMerkleTree(hashStore=hash_store), dataDir=config_helper.ledger_dir,
                      fileName=config.poolTransactionsFile, read_only=True)
      nodeReg, _, _ = TxnStackManager.parseLedgerForHaAndKeys(ledger)
  
      if nodeReg == None:
          logger.error("Empty node registry returned by stack manager")
          return False
  
      if not node_name in nodeReg:
          logger.error("Node registry does not contain node {}".format(node_name))
          return False
  
      ha = nodeReg[node_name]
      if ha == None:
          logger.error("Empty HA for node {}".format(node_name))
          return False
  
      logger.info("HA for {}: {}".format(node_name, ha))
  
      try:
          append_ips_to_env(ha.host)
      except Exception:
          logger.error(traceback.print_exc())
          logger.error("Could not append node and client IPs to indy env file")
          return False
  
      return True
  
  if migrate_all():
      logger.info("Migration complete: node and client IPs have been added to indy env file")
  else:
      logger.error("Migration failed: node and client IPs have not been added to indy env file")
      sys.exit(1)
  
subject: Add migration script that appends node and client IPs to indy env file.