Cloudera Manager 4.5 compatible Update rackId for all hosts

rackId.py

#!/usr/bin/env python
from cm_api.api_client import ApiResource
from cm_api.endpoints.hosts import ApiHost
import json

def update_rackId(resource_root, host_id, rack_id=None):
  resp = resource_root.put('%s/%s' % ("/hosts", host_id), data=json.dumps({"rackId":rack_id}))
  return ApiHost.from_json_dict(resp, resource_root)


api = ApiResource('localhost', 7180, 'admin', 'admin')

for h in api.get_all_hosts():
  print 'Before hostId: {0} rackId: {1}'.format(h.hostId, h.rackId)
  host = update_rackId( api, h.hostId, "/default")
  print 'After hostId: {0} rackId: {1} \n'.format(host.hostId, host.rackId)