pcs commands show "Unable to authenticate" or "Unable to communicate with PCSD"

Solution Verified - Updated -

Issue

  • pcs cluster auth fails with Unable to communicate with PCSD error.
  • pcs status shows Unable to authenticate in PCSD Status section.
# pcs cluster auth node-a node-b -u hacluster -p <password>
Error: Unable to communicate with pcsd

# pcs status
...
PCSD Status:
  node-a: Unable to authenticate
  node-b: Unable to authenticate
...

Environment

  • Red Hat Enterprise Linux 6, 7 (with the High Availability Add-on)
  • Pacemaker
  • pcs versions older than 0.9.158-6.el7

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