cea-hpc
Permission denied (publickey,password) problem
as root, the first of the following works and the second no:
- 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
- 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
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
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
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.
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
