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clush: Host verification failed on Amazon EC2 3 node cluster

Question asked by vij_mapr on Jul 30, 2015
Latest reply on Aug 4, 2015 by kirk_lewis
Hi,
I am following your on-demand training for Hadoop operations and per the lab guide I have set up 3 nodes on  Amazon EC2 cluster.
Following lab guide's instructions, installed clustershell and ran clush but it fails with "Host key verification failed" for all three nodes. Prior to this i have done following:

 - from .pem generated .ppk --> winscp to one (master) node and transferred .pem file.
 - putty to master node with .ppk authentication
 - syskey-gen --> created .pub in .ssh --> scp to other node with .pem bind and copied .pub and appended to authorized_keys
 - followed the above step for the third node
 - updated /etc/clustershell/groups with internal ip info of all nodes in all: 10.0.0.x 10.0.0.y 10.0.0.z
 - now i run clush -a date command for sanity check and it failes with "Host verfiicaiton failed"

Can you tell me why clush is not able to verify the hosts? Your help is greatly appreciated.

Thanks,


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