Permission denied (publickey,password) on Apache-ambari when creating a cluster

Question

I'm installing apache-ambari on ubuntu 14.04. IP:8080 on browser worked and I can connect to another host via ssh. I followed verified answer of this question Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password) during ambari hadoop installation and also Host registration in Ambari fails with "Permission denied" But my problem has not yet been resolved.

Error:

Registration log for hadoopmaster
==========================
Creating target directory...
==========================

Command start time 2018-05-08 19:05:24

Permission denied (publickey,password).
SSH command execution finished
host=hadoopmaster, exitcode=255
Command end time 2018-05-08 19:05:24

ERROR: Bootstrap of host hadoopmaster fails because previous action finished with non-zero exit code (255)
ERROR MESSAGE: Permission denied (publickey,password).

STDOUT: 
Permission denied (publickey,password).

In this step, I want to create one cluster and add one node (myself as server or master). I set right permission for ssh and authorized_keys. Is my private key wrong? Is my FQDN(hadoopmaster) wrong? Note: I installed hadoop without apache-ambari on my system and it's OK. Please help me.

Answer 1

It should be a wrong private key or a wrong content of authorized_keys. Maybe you added/forgot to add some newline in any of these files when copy-pasting contents. You may try ssh-copy-id command to fill up authorized_keys file correctly