Add support for hdfs ha config

jvalkeal commented 9 years ago

relates to #6
we basically detect if namenode ha is enabled which in ambari is done via a wizard after an initial cluster provisioning.
we modify both hadoop.properties and xd-shell.init for below settings(I named my ha as 'mycluster'):

dfs.ha.automatic-failover.enabled=True

dfs.nameservices=mycluster

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

dfs.ha.namenodes.mycluster=nn1,nn2

dfs.namenode.rpc-address.mycluster.nn2=ambari-3.localdomain:8020

dfs.namenode.rpc-address.mycluster.nn1=ambari-2.localdomain:8020

ysung-pivotal commented 9 years ago

You can detect if namenode ha is enabled by the following.

nn_ha_enabled=config['configurations']['hdfs-site'].get('dfs.nameservices')

jvalkeal commented 9 years ago

spring-attic / spring-xd-ambari