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Old 10-29-2021, 08:07 AM   #1
ViktorNazd
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Registered: Oct 2021
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Intel mpi cannot ssh to node (RHEL 7.7)


Dear, all


I have a problem to make cluster computing on two nodes. I can did it easily on ubuntu. But the consumers need it on RHEL 7.7 and there I have some dificulties. With Intel mpi I get endless trying to use second node. I've tried mpich and it shows "Host key verification failed", but I'm sure it's set correctly: connection without password due to SSH can be reached, I checked known_hosts and key files and they are correct.


Does anybody knows what's the problem?


Kind regards,

Viktor
 
Old 10-29-2021, 09:31 AM   #2
TB0ne
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Quote:
Originally Posted by ViktorNazd View Post
Dear, all
I have a problem to make cluster computing on two nodes. I can did it easily on ubuntu. But the consumers need it on RHEL 7.7 and there I have some dificulties. With Intel mpi I get endless trying to use second node. I've tried mpich and it shows "Host key verification failed", but I'm sure it's set correctly: connection without password due to SSH can be reached, I checked known_hosts and key files and they are correct.
First, have you contacted Red Hat support, or looked in Red Hat's knowledgebase? Since you're using RHEL 7, you're paying for support (RIGHT??), so you have access to those resources.

Past that, you need to make sure that the two systems are in their respective hosts files, and that things are set correctly with "hostnamectl set-hostname <system name>".
 
  


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