def configure_ha(cluster, datanode):
hadoop = get_hadoop_base()
hdfs = HDFS(hadoop)
cluster_nodes = cluster.nodes()
jn_nodes = datanode.nodes()
jn_port = datanode.jn_port()
if data_changed('namenode.ha', [cluster_nodes, jn_nodes, jn_port]):
utils.update_kv_hosts(cluster.hosts_map())
utils.manage_etc_hosts()
hdfs.register_journalnodes(jn_nodes, jn_port)
hdfs.restart_namenode()
datanode.send_namenodes(cluster_nodes)
if not is_state('namenode.shared-edits.init'):
hdfs.init_sharededits()
set_state('namenode.shared-edits.init')
def update_ha_config(datanode):
cluster_nodes = get_cluster_nodes()
jn_nodes = sorted(datanode.nodes())
jn_port = datanode.jn_port()
started = is_state('namenode.started')
new_cluster_config = data_changed('namenode.cluster-nodes', cluster_nodes)
new_jn_config = data_changed('namenode.jn.config', (jn_nodes, jn_port))
hadoop = get_hadoop_base()
hdfs = HDFS(hadoop)
hdfs.configure_namenode(cluster_nodes)
hdfs.register_journalnodes(jn_nodes, jn_port)
if started and new_cluster_config:
hdfs.restart_namenode()
elif started and new_jn_config:
hdfs.reload_slaves() # is this actually necessary?
