High-availability clusters on RHEL diagnostic information

For problems that are related to a Red Hat Enterprise Linux (RHEL) high-availability cluster for SAP, provide the following information to Cloud Customer Care as soon as you can:

  • A complete and detailed description of the problem or error, including:

    • The current application or system state.
    • The date and time when the error occurred.
  • Information about the cluster, including configuration details, system information, and diagnostic information.

    • If you have the Red Hat sos package or can install it, use the sosreport tool to collect the cluster information.

      • To install the sos package:

        sudo yum install -y sos
      • Run the sosreport tool on all cluster nodes:

        sosreport
    • If do not have the sos package, you can run the crm_report tool on all cluster nodes and provide the Corosync logs.

      Specify a start time (from time) that is approximately 1 hour before the issue occurred. Specify an end time (to time) that is at least an hour after the issue was resolved.

      • Run the crm_report on all nodes, specifying the from time and to time on the '-f' and '-t' flags, respectively.

        crm_report -f "yyyy/mm/dd hh:mm" -t "yyyy/mm/dd hh:mm"
      • Provide the log file for the cluster software from each cluster node. The name and location of the log file differs depending on the RHEL version:

        • RHEL 8: /var/log/pacemaker/pacemaker.log
        • RHEL 7: /var/log/cluster/corosync.log

For more information about the sosreport tool, see What is an sosreport and how to create one in Red Hat Enterprise Linux?.