'pcs cluster auth' fails with "Unable to connect to pcsd" or "Unable to communicate" in a High Availability cluster with pacemaker

Solution Verified - Updated -


  • While configuring the pacemaker cluster, pcs cluster auth command is failing with the below error message
# pcs cluster auth node1 node2
Username: hacluster
Error: unable to connect to pcsd on node1
Unable to connect to node1 ([Errno -2] Name or service not known)
  • A cluster node was not authorized:
# pcs cluster auth 10.X.X.1 10.X.X.2
Username: hacluster
10.X.X.1: Already authorized
Error: Unable to communicate with 10.X.X.2


  • Red Hat Enterprise Linux (RHEL) 6, 7, or 8 with the High Availability Add On
  • Pacemaker
  • pcs

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