controld resource fails to start with "dlm: Unknown symbol sctp_do_peeloff (err 0)" and "modprobe: ERROR: could not insert 'dlm'" in a RHEL 7 Resilient Storage cluster
Issue
- When we attempt to start our
controldresource, we get errors in the logs and the resource fails - I can't start
dlm_controld, and we see errors aboutsctp
Sep 13 14:56:10 node1 kernel: dlm: Unknown symbol sctp_do_peeloff (err 0)
Sep 13 14:56:10 node1 controld(dlm)[43667]: ERROR: /sys/kernel/config/dlm not available
Sep 13 14:56:10 node1 lrmd[43478]: notice: dlm_start_0:43667:stderr [ modprobe: ERROR: could not insert 'dlm': Unknown symbol in module, or unknown parameter (see dmesg) ]
Sep 13 14:56:10 node1 crmd[43481]: notice: Operation dlm_start_0: not installed (node=node1, call=26, rc=5, cib-update=17, confirmed=true)
Environment
- Red Hat Enterprise Linux (RHEL) 7 with the Resilient Storage Add-On
- See this solution for details of a similar problem in RHEL 6
dlm- One or more
controldresources in the cluster CIB - A blacklist entry, module-install option, or other mechanism that prevents the
sctpmodule from being loaded- See Diagnostic Steps for locating these mechanisms
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