Configuring the HA Function for SAP S/4HANA Nodes

Procedure

1. Log in to the active SAP S/4HANA node, obtain the ha_auto_script.zip package, and decompress it to any directory.
   1. Select the region where SAP S/4HANA is to be installed and download the script.

      Select the region where SAP S/4HANA is to be installed and download the script. The following uses CN-Hong Kong as an example:

      wget https://obs-sap-ap-southeast-1.obs.ap-southeast-1.myhuaweicloud.com/ha_auto_script/ha_auto_script.zip -P /sapcd

      The script download addresses for different regions are as follows:

      • CN-Hong Kong: https://obs-sap-ap-southeast-1.obs.ap-southeast-1.myhuaweicloud.com/ha_auto_script/ha_auto_script.zip
      • AP-Bangkok: https://obs-sap-ap-southeast-2.obs.ap-southeast-2.myhuaweicloud.com/ha_auto_script/ha_auto_script.zip
      • AF-Johannesburg: https://obs-sap-af-south-1.obs.af-south-1.myhuaweicloud.com/ha_auto_script/ha_auto_script.zip
      • LA-Santiago: https://obs-sap-la-south-2.obs.la-south-2.myhuaweicloud.com/ha_auto_script/ha_auto_script.zip
      • LA-Sao Paulo1: https://obs-sap-sa-brazil-11.obs.sa-brazil-1.myhuaweicloud.com/ha_auto_script/ha_auto_script.zip
      • LA-Mexico City1: https://obs-sap-na-mexico-1.obs.na-mexico-1.myhuaweicloud.com/ha_auto_script/ha_auto_script.zip
      • LA-Mexico City2: https://obs-sap-la-north-2.obs.la-north-2.myhuaweicloud.com/ha_auto_script/ha_auto_script.zip
   2. Run the following commands to decompress the obtained script package:

      cd /sapcd

      unzip ha_auto_script.zip

      

      

2. Set parameters in the ascs_ha.cfg file based on the site requirements. Table 1 describes the parameters in the file.

   Table 1 Parameters in the ascs_ha.cfg file

   Type	Name	Description
   masterNode	masterName	ASCS instance node name
   	masterHeartbeatIP1	Heartbeat plane IP address 1 of the ASCS instance node
   	masterHeartbeatIP2	Service plane IP address of the ASCS instance node
   slaveNode	slaveName	ERS instance node name
   	slaveHeartbeatIP1	Heartbeat plane IP address 1 of the ERS instance node
   	slaveHeartbeatIP2	Service plane IP address of the ERS instance node
   ASCSInstance	ASCSFloatIP	Service IP address of the ASCS instance node
   	ASCSInstanceDir	Directory of the ASCS instance
   	ASCSDevice	Disk partition used by the ASCS instance directory
   	ASCSProfile	Profile file of the ASCS instance
   ERSInstance NOTE: You need to log in to the ERS instance node to obtain the information about the ERSInstanceDir, ERSDevice, and ERSProfile parameters.	ERSFloatIP	Service IP address of the ERS instance node
   	ERSInstanceDir	Directory of the ERS instance
   	ERSDevice	Disk partition used by the ERS instance directory
   	ERSProfile	Profile file of the ERS instance
   trunkInfo	SBDDevice	Independent disk used by the SBD. One or three disks are supported. Every two disks are separated by a comma (,), for example, /dev/sda, /dev/sdb, /dev/sdc.

   

3. Run the following command to perform automatic HA deployment:

   sh ascs_auto_ha.sh

   

   

4. Run the following command to check the resource status:

   crm status

   

   

   After the HA function is configured, HAE manages resources. Do not start or stop resources in other modes. If you need to manually perform test or modification operations, switch the cluster to the maintenance mode first.

   crm configure property maintenance-mode=true

   Exit the maintenance mode after the modification is complete.

   crm configure property maintenance-mode=false

   If you need to stop or restart the node, manually stop the cluster service.

   systemctl stop pacemaker

   After the ECS is started or restarted, run the following command to start the cluster service:

   systemctl start pacemaker

   To clear the HA configuration, run the following command on the active node for which HA is configured (Roll back to the initial status if the active and standby nodes are switched over.):

   sh ascs_auto_ha.sh unconf