def send_info(datanode):
hadoop = get_hadoop_base()
hdfs = HDFS(hadoop)
local_hostname = hookenv.local_unit().replace('/', '-')
hdfs_port = hadoop.dist_config.port('namenode')
webhdfs_port = hadoop.dist_config.port('nn_webapp_http')
utils.update_kv_hosts(datanode.hosts_map())
utils.manage_etc_hosts()
datanode.send_spec(hadoop.spec())
datanode.send_namenodes([local_hostname])
datanode.send_ports(hdfs_port, webhdfs_port)
datanode.send_ssh_key(utils.get_ssh_key('hdfs'))
datanode.send_hosts_map(utils.get_kv_hosts())
slaves = datanode.nodes()
if data_changed('namenode.slaves', slaves):
unitdata.kv().set('namenode.slaves', slaves)
hdfs.register_slaves(slaves)
hdfs.refresh_slaves()
hookenv.status_set('active', 'Ready ({count} DataNode{s})'.format(
count=len(slaves),
s='s' if len(slaves) > 1 else '',
))
set_state('namenode.ready')
