nameserver support

[hn5092]

this version reair dont support two namesever , should add man config exp:

dfs.nameservices
srcCluster,destCluster


dfs.ha.namenodes.srcCluster
nn1,nn2


dfs.ha.namenodes.destCluster
namenode317,namenode319


dfs.namenode.rpc-address.srcCluster.nn1
a1-ops-hdnamenode01.hz:8020


dfs.namenode.rpc-address.srcCluster.nn2
a1-ops-hdnamenode02.hz:8020


dfs.namenode.rpc-address.destCluster.namenode317
a2-prod-sh-namenode-XX-124.sh:8020


dfs.namenode.rpc-address.destCluster.namenode319
a2-prod-sh-namenode-XX-123.sh:8020


dfs.client.failover.proxy.provider.srcCluster
org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider


dfs.client.failover.proxy.provider.destCluster
org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider

[plypaul]

@hn5092 That configuration fits better in hdfs-site.xml instead of the reair configuration file.