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Posted to user@hadoop.apache.org by Pankaj Chand <pa...@gmail.com> on 2020/03/03 19:27:01 UTC

Exchanging Public Keys

Hi all,

When installing Hadoop 2.X and YARN on a Multi-node cluster, several guides
state to only copy the master node's public key to all the slave nodes'
authorized keys file.

However, this would only allow the master daemons to send messages to the
slave daemons.

My question is, is that sufficient, or should we also exchange all slave
nodes' public keys to all nodes' authorized keys file, so that slave nodes
can talk to each other when running Spark or Flink on top?

Thanks,

Pankaj