How to configure standalone Ambari Files View to another cluster with NameNode HA

[#1]

Someone recently asked me how to configure a standalone Ambari Server with the Files View to point correctly to a server running NameNode HA.

Whenever active/standby NameNodes switch roles, the Files View can correctly handle the transition.

[#2 · Accepted solution]

On the cluster with the NameNodes, set these properties in HDFS for custom core-site,

hadoop.proxyuser.root.groups=*

hadoop.proxyuser.root.hosts=*

Navigate to http://server:8080/api/v1/clusters/$name/configurations?type=hdfs-site

click on the last config, and take note of several of the properties

On the standalone Ambari Server hosting the Views, create the Files View and configure it as follows,

• WebHDFS FileSystem URI: webhdfs://$nameservice:50070
• List of NameNodes: Value from dfs.ha.namenodes.$nameservice E.g., "nn1,nn2"
• NameNode RPC Address: fqdn:8020 (comes from dfs.namenode.rpc-address.$nameservice.$nodename )
• NameNdoe HTTP (WebHDFS) Address: fqdn:50070 (comes from dfs.namenode.http-address.$nameservice.$nodename )
• Failover Proxy Provider: Value from dfs.client.failover.proxy.provider.$nameservice E.g., "org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider"

Voila,