SAP HANA scale-out - pacemaker.service: "Cannot find sapstartsrv and sapcontrol executable, please set DIR_EXECUTABLE parameter!"

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Environment

SUSE Linux Enterprise Server for SAP 15

Situation

An SUSE HA cluster for SAP HANA scale-out and the HANA database have been set up. SAP hostagent and HANA database are configured for native systemd integration. Cluster and HANA are seeming to be functional. Nevertheless, on the majority maker node the pacemaker service shows an error on missing sapstartsrv and sapcontrol executables.

hana00:~ # systemctl status pacemaker

* pacemaker.service - pacemaker needs SAP instance service
     Loaded: loaded (/usr/lib/systemd/system/pacemaker.service; disabled; vendor preset: disabled)
    Drop-In: /etc/systemd/system/pacemaker.service.d/00-pacemaker.conf
     Active: active (running) since Tue 2023-05-02 13:14:23 CEST; 12s ago
       Docs: man:pacemakerd
             https://clusterlabs.org/pacemaker/doc/
             man:SAPHanaSR-ScaleOut_basic_cluster(7)
   Main PID: 5332 (pacemakerd)
      Tasks: 9
     CGroup: /system.slice/pacemaker.service 
...
May 02 13:14:28 hana00 SAPHanaController(rsc_SAPHanaCon_HA1_HDB10)[5498]: ERROR: ACT: Cannot find sapstartsrv and sapcontrol executable, please set DIR_EXECUTABLE parameter!
May 02 13:14:28 hana00 pacemaker-controld[5339]:  notice: Result of probe operation for rsc_SAPHanaCon_HA1_HDB10 on hana00: not running

Resolution

In the specific case of majority maker nodes for SAP HANA scale-out clusters, the
message can safely be ignored. In this case there is neither SAP HANA nor SAP
hostagent installed by intention.

If a corosync quorum device is used instead of the majority maker node, the
situation will not occur. There is no pacemaker on the quorum device.

The message must not to be confused with similar error messages from resource
agents SAPHanaController or SAPHana on regular cluster nodes. On regular cluster
nodes this error has to be taken serious. There it needs investigation.

Cause

The pacemaker cluster probes on all nodes for active resources. Even on nodes that
are excluded by location constraints, probes are done to make sure no unexpected
resources are running. Probes are triggered when the pacemaker service is started.
In case of HANA the probe checks the needed binaries for SAP which are not installed on the
majority maker node.

Additional Information

Manual pages SAPHanaSR-ScaleOut(7), SAPHanaSR_basic_cluster(7)
SUSE TIDs 7024037 7022702 7022984 000019899 000020964

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