Cluster unable to form with error "cannot start dlm lowcomms -107" when openais service is started

Solution Verified - Updated -

Issue

  • Cannot add node to existing 2-node Red Hat Enterprise Linux 5.4 cluster
    • When trying to use conga to add a 3rd node to a cluster, it gives no errors but CMAN will not start.
  • Clustering will start fine on the second node but fails upon  starting cman on the first node.
    • The issue is related to the dlm kernel  module not starting correctly.  It loads cleanly, but there are no  kernel processes to be found in ps.
    • Upon starting cman I see the following errors printed:

      dlm: no local IP address has been set 
      dlm: cannot start dlm lowcomms -107 
      

Environment

  • Red Hat Enterprise Linux 5 Advanced Platform (Clustering)
    • Openais service is chkconfig'd on to start at boot.

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