How do I make a RHEL HA resource non-critical?

Solution Verified - Updated -

Issue

  • What is the "__independent_subtree" attribute?
  • Is there a way to configure certain resources as non-critical?
  • Can I configure my cluster to attempt to restart failed resources rather than failing the entire service?
  • Can I configure my cluster service to not fail if a non-critical resource fails?

Environment

  • Red Hat Cluster Suite 4+
  • Red Hat Enterprise Linux Server 5 (with the High Availability Add on)
  • Red Hat Enterprise Linux Server 6 (with the High Availability Add on)
  • Red Hat Enterprise Linux Server 7 (with the High Availability Add on)
  • Resource Manager: RGManager or Pacemaker

  • rgmanager

    • Service configured with __independent_subtree options (for example): 
        <service autostart="1" domain="node2_prefer" name="Service01" recovery="relocate">
            <ip ref="10.10.10.12/24">
                    <script __independent_subtree="2" __max_restarts="3" __restart_expire_time="30" ref="httpd"/>
            </ip>
    </service>

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