Permission denied (publickey,password) problem

[potant]

as root, the first of the following works and the second no:

1. clush -w node-10 uptime
   node-10: 12:12:45 up 21 days, 23:27, 0 users, load average: 21.04, 21.01, 21.00
2. clush --user someuser -w node-10 uptime
   node-10: Permission denied (publickey,password).
   clush: node-10: exited with exit code 255

/etc/clustershell/clush.conf is the default one

[degremont]

You don't have permission to connect to node-10 as someuser.
Please verify:

ssh -oBatchMode=yes someuser@node-10 uptime

And:

clush -v -d --user someuser -w node-10 uptime

[potant]

Yes i verified it. And if i make ssh someuser@node-10, it prompts me for password giving.
So, clush works only with -oBatchMode=yes? If yes, then key-based authentication must me enabled so that clush doesnt give permission error?
Thanks

[degremont]

key-based authentication must me enabled so that clush doesnt give permission error?

You're right. Any password-less methods supported by SSH could be used (ticket based like Kerberos, Munge, Asymetric Keys, ...)

About password based authentication, there is an example to workaround this behaviour using sshpass:
https://github.com/cea-hpc/clustershell/blob/master/conf/clush.conf#L21

If you really need a password authentication, there is a ticket #198 you can track to know when the feature will be implemented. This is not under active development at the moment.

[thiell]

With clustershell 1.9, you should be able to use the new sshpass clush mode (provided as an example) to use password based authentication:

# enable sshpass mode
cp /etc/clustershell/clush.conf.d/sshpass.conf.example /etc/clustershell/clush.conf.d/sshpass.conf
# your example
clush -m sshpass --user someuser -w node-10 uptime