def _get_hadoop_configs(node_group):
cluster = node_group.cluster
nn_hostname = vu.get_instance_hostname(vu.get_namenode(cluster))
dirs = _get_hadoop_dirs(node_group)
confs = {
'Hadoop': {
'fs.defaultFS': 'hdfs://%s:9000' % nn_hostname
},
'HDFS': {
'dfs.namenode.name.dir': ','.join(dirs['hadoop_name_dirs']),
'dfs.namenode.data.dir': ','.join(dirs['hadoop_data_dirs']),
'dfs.hosts': '%s/dn-include' % HADOOP_CONF_DIR,
'dfs.hosts.exclude': '%s/dn-exclude' % HADOOP_CONF_DIR
}
}
res_hostname = vu.get_instance_hostname(vu.get_resourcemanager(cluster))
if res_hostname:
confs['YARN'] = {
'yarn.nodemanager.aux-services':
'mapreduce_shuffle',
'yarn.resourcemanager.hostname':
'%s' % res_hostname,
'yarn.resourcemanager.nodes.include-path':
'%s/nm-include' % (HADOOP_CONF_DIR),
'yarn.resourcemanager.nodes.exclude-path':
'%s/nm-exclude' % (HADOOP_CONF_DIR)
}
confs['MapReduce'] = {'mapreduce.framework.name': 'yarn'}
oozie = vu.get_oozie(cluster)
if oozie:
hadoop_cfg = {
'hadoop.proxyuser.hadoop.hosts': '*',
'hadoop.proxyuser.hadoop.groups': 'hadoop'
}
confs['Hadoop'].update(hadoop_cfg)
oozie_cfg = o_helper.get_oozie_required_xml_configs(HADOOP_CONF_DIR)
if c_helper.is_mysql_enabled(cluster):
oozie_cfg.update(o_helper.get_oozie_mysql_configs())
confs['JobFlow'] = oozie_cfg
if c_helper.get_config_value(c_helper.ENABLE_SWIFT.applicable_target,
c_helper.ENABLE_SWIFT.name, cluster):
swift_configs = {}
for config in swift.get_swift_configs():
swift_configs[config['name']] = config['value']
confs['Hadoop'].update(swift_configs)
if c_helper.is_data_locality_enabled(cluster):
confs['Hadoop'].update(th.TOPOLOGY_CONFIG)
confs['Hadoop'].update(
{"topology.script.file.name": HADOOP_CONF_DIR + "/topology.sh"})
return confs, c_helper.get_env_configs()
def validate_existing_ng_scaling(cluster, existing):
scalable_processes = _get_scalable_processes()
dn_to_delete = 0
for ng in cluster.node_groups:
if ng.id in existing:
if ng.count > existing[ng.id] and "datanode" in ng.node_processes:
dn_to_delete += ng.count - existing[ng.id]
if not set(ng.node_processes).issubset(scalable_processes):
msg = ("Vanilla plugin cannot scale nodegroup "
"with processes: %s")
raise ex.NodeGroupCannotBeScaled(
ng.name, msg % ' '.join(ng.node_processes))
dn_amount = len(vu.get_datanodes(cluster))
rep_factor = c_helper.get_config_value('HDFS', 'dfs.replication', cluster)
if dn_to_delete > 0 and dn_amount - dn_to_delete < rep_factor:
msg = ("Vanilla plugin cannot shrink cluster because it would be not "
"enough nodes for replicas (replication factor is %s)")
raise ex.ClusterCannotBeScaled(cluster.name, msg % rep_factor)
