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Adding Node to RAC Fails with SSH Equivalency on NxN Check

From: David Barbour <david.barbour1_at_gmail.com>
Date: Tue, 12 Apr 2022 10:40:41 -0500
Message-ID: <CAFH+iffQSFVBscAiY8XR=G8L4cFzqfPoDsyvBDUDrGe_zTRz=Q_at_mail.gmail.com> 





Morning Listers,



Oracle 19.11 RHEL 7.6



We are switching servers and the new nodes are running RHEL 8.3.



When attempting to add one of the new nodes to the existing RAC,
gridSetup.sh errors out on passwordless ssh connectivity.



I've verified I can ssh without a password from the command line between
all 3 servers as both the oracle and grid users.



The install log shows:


Preparing to check passwordless SSH Connectivity between nodes: [node1,
node3]


Testing passwordless SSH connectivity between the selected nodes.
 OverallStatus of User Equivalence check using CVU is SUCCESSFUL



Preparing to check passwordless SSH Connectivity between nodes: [node1,
node2, node3]


Testing passwordless SSH connectivity between the selected nodes.
OverallStatus of User Equivalence check using CVU is SUCCESSFUL



Verifying passwordless SSH connectivity setup on all the cluster nodes
using cvu's NxN check


Remote node(s) not configured for passwordless SSH connectivity :[node3]



Any ideas here?  What is the NxN check?  selinux is set to permissive.



/var/log/secure (on the new node) shows:


 Accepted password for grid from 192.168.194.133 port 35715 ssh2



/var/log/secure on the installing node shows:


Accepted publickey for grid from 192.168.194.134 port 39409 ssh2



Scratching my head here.  The known_hosts and authorized_keys files look
good.  Took out FQDN per some Oracle note.  Have rebuilt these by hand
adding RSA in addition to ECDSA but no joy.


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Received on Tue Apr 12 2022 - 17:40:41 CEST












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