DCA V1/V2/V3: How to re-generate the exchange keys on a DCA; Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password)."

DCA V1/V2/V3: How to re-generate the exchange keys on a DCA; Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password)."

Environment:

Data Computing Appliance V1

Data Computing Appliance V2

Data Computing Appliance V3

 

Description:

Exchange keys not setup on the cluster correctly causing communications issues.

A sample error of this when running dcacheck:

 

DCA_CHECK_ERROR: Error could not get mac addresses from switches: Got exception for i-sw-2: Error running network switch script: Permission denied (publickey,keyboard-interactive).

 

 

Resolution:

Test connectivity to all hosts using:

gpssh -f /home/gpadmin/gpconfigs.hostfile

 

This will fail asking for passwords to some hosts.

For a detailed step by step resolution please refer to EMC Support Solution  455290  https://support.emc.com/kb/455290