is password less ssh required if installing HDP on a single node?

[#1]

what commands should i run if installing hdp on a single node in terms of ssh?

[#2 · Accepted solution]

@Beluru Karan

Passwordless SSH is needed for Ambari Server to install & register ambari-agents on hosts using Ambari API calls (OR) using ambari UI. This is specially needed so that using Passwordless SSH the ambari server user can install the ambari agents on remote hosts.

Hence in case of Single host, we can simply install the ambari-server and ambari-agent binaries on the same host on our own hence it is not mandatory.

Also in case of Manual ambari agent registration/installation the Passwordless SSH is not needed. It is needed only when we want ambari to install the agents on the desired hosts (local / remote) using Ambari API calls or using Ambari UI.

For ambari agent manual installation please refer to: https://docs.hortonworks.com/HDPDocuments/Ambari-2.6.2.2/bk_ambari-administration/content/ch_amb_ref...