S4/HANA Cost-optimized Cluster Setup
To support the high availability of your SAP system, the IT team can install SAP in a cluster environment. A cluster is a group of two or more connected servers that are configured with the same operating system, databases, and applications. These connected servers are referred to as “nodes.”
Procedure
1. BACK UP
1.1 Take the backup of the existing system database
![S4/HANA Cost-optimized Cluster Setup 1](https://www.esds.co.in/kb/wp-content/uploads/2022/03/1.png)
![S4/HANA Cost-optimized Cluster Setup 2](https://www.esds.co.in/kb/wp-content/uploads/2022/03/2.png)
1.2 Check the replication status
![S4/HANA Cost-optimized Cluster Setup 3](https://www.esds.co.in/kb/wp-content/uploads/2022/03/3.png)
1.3 INSTALL NTP PACKAGE ON BOTH NODE
Execute the following commands:
- zypper in ntp
- echo “server ntp1.esds.co.in” >> /etc/ntp.conf
![S4/HANA Cost-optimized Cluster Setup 4](https://www.esds.co.in/kb/wp-content/uploads/2022/03/4.png)
1.4 INSTALL HA_SLES PACKAGES
Execute the following command
- zypper in –t pattern ha_sles
![S4/HANA Cost-optimized Cluster Setup 5](https://www.esds.co.in/kb/wp-content/uploads/2022/03/5.png)
![S4/HANA Cost-optimized Cluster Setup 6](https://www.esds.co.in/kb/wp-content/uploads/2022/03/6.png)
1.5 Installation completed
![S4/HANA Cost-optimized Cluster Setup 7](https://www.esds.co.in/kb/wp-content/uploads/2022/03/7.png)
1.6 Enable SOFTDOG
Execute the following command to enable
- lsmod | grep softdog
![S4/HANA Cost-optimized Cluster Setup 8](https://www.esds.co.in/kb/wp-content/uploads/2022/03/8.png)
2. STOP NTP –> on both the nodes
Command
- rcntpd stop
![S4/HANA Cost-optimized Cluster Setup 9](https://www.esds.co.in/kb/wp-content/uploads/2022/03/9.png)
3. How to add the shared disk on Node1
![S4/HANA Cost-optimized Cluster Setup 10](https://www.esds.co.in/kb/wp-content/uploads/2022/03/10.png)
![S4/HANA Cost-optimized Cluster Setup 11](https://www.esds.co.in/kb/wp-content/uploads/2022/03/11.png)
- Note: Maintain the following parameters
Disk provisioning – Thick Provision Eagar Zeroed
Sharing- Multi-writer
Virtual Device Node- SCSI controller 1
Stonith disk- 5 GB
4. CONFIGURE WATCHDOG ON BOTH NODES
Commands:
- lsmod | grep soft — > check whether watchdog is configured or available
- ls -lrt /etc/modules-load.d/
- echo softdog > /etc/modules-load.d/watchdog.conf
- cat /etc/modules-load.d/watchdog.conf
- lsmod | grep softdog
- modprobe softdog
- lsmod | grep softdog
![S4/HANA Cost-optimized Cluster Setup 12](https://www.esds.co.in/kb/wp-content/uploads/2022/03/12.png)
5. SSH –KEYGEN CONFIGURATION
Command:
- ssh-keygen
![S4/HANA Cost-optimized Cluster Setup 13](https://www.esds.co.in/kb/wp-content/uploads/2022/03/13.png)
![S4/HANA Cost-optimized Cluster Setup 14](https://www.esds.co.in/kb/wp-content/uploads/2022/03/14.png)
6. CHECK THE CLUSTER CONFIGURATION
Command:
- crm status
![S4/HANA Cost-optimized Cluster Setup 15](https://www.esds.co.in/kb/wp-content/uploads/2022/03/15.png)
7. HOW TO ADD SDB STONITH DISK ON 2nd NODE
Commands:
- sbd -d /dev/disk/by-id/scsi-36000c29aae4ad3f3ebe78d012dcfd69a create
- sbd -d /dev/disk/by-id/scsi-36000c29aae4ad3f3ebe78d012dcfd69a dump
- sbd -d /dev/disk/by-id/scsi-36000c29aae4ad3f3ebe78d012dcfd69a list
![S4/HANA Cost-optimized Cluster Setup 16](https://www.esds.co.in/kb/wp-content/uploads/2022/03/16.png)
7.1 Enable NTPD &Cluster enable
Command:
- systemctl enable ntpd
- ha-cluster-join
![S4/HANA Cost-optimized Cluster Setup 17](https://www.esds.co.in/kb/wp-content/uploads/2022/03/17.png)
7.2 Check the cluster configuration
Execute the following commands
- crm status
- crm configure property management-mode-“true”
![S4/HANA Cost-optimized Cluster Setup 18](https://www.esds.co.in/kb/wp-content/uploads/2022/03/18.png)
![S4/HANA Cost-optimized Cluster Setup 19](https://www.esds.co.in/kb/wp-content/uploads/2022/03/19.png)
8. HOW TO ADD VIRTUAL IP ON PRIMARY NODE
![S4/HANA Cost-optimized Cluster Setup 20](https://www.esds.co.in/kb/wp-content/uploads/2022/03/20.png)
![S4/HANA Cost-optimized Cluster Setup 21](https://www.esds.co.in/kb/wp-content/uploads/2022/03/21.png)
![S4/HANA Cost-optimized Cluster Setup 22](https://www.esds.co.in/kb/wp-content/uploads/2022/03/22.png)
![S4/HANA Cost-optimized Cluster Setup 23](https://www.esds.co.in/kb/wp-content/uploads/2022/03/23.png)
8.1 Database File system issue
![S4/HANA Cost-optimized Cluster Setup 24](https://www.esds.co.in/kb/wp-content/uploads/2022/03/24.png)
Note: Configure reverse replication
9. ENABLE REVERSE REPLICATION
![S4/HANA Cost-optimized Cluster Setup 25](https://www.esds.co.in/kb/wp-content/uploads/2022/03/25.png)
![S4/HANA Cost-optimized Cluster Setup 26](https://www.esds.co.in/kb/wp-content/uploads/2022/03/26.png)
9.1 Configured the HANA replication PRIMARY to SECONDARY
![S4/HANA Cost-optimized Cluster Setup 27](https://www.esds.co.in/kb/wp-content/uploads/2022/03/27.png)
![S4/HANA Cost-optimized Cluster Setup 28](https://www.esds.co.in/kb/wp-content/uploads/2022/03/28.png)
![S4/HANA Cost-optimized Cluster Setup 29](https://www.esds.co.in/kb/wp-content/uploads/2022/03/29.png)
10. HOW TO ADD SAP APPLICATION IN CLUSTER
Enter the URL – <ipaddress>:<port>/login
Username – hacluster
Password – linux
![S4/HANA Cost-optimized Cluster Setup 30](https://www.esds.co.in/kb/wp-content/uploads/2022/03/30.png)
Go to –>SAP HANA SR Scale-Up Performance-Optimized
![S4/HANA Cost-optimized Cluster Setup 31](https://www.esds.co.in/kb/wp-content/uploads/2022/03/31.png)
10.1 Enter the HANA application parameters
![S4/HANA Cost-optimized Cluster Setup 32](https://www.esds.co.in/kb/wp-content/uploads/2022/03/32-1-1024x501.png)
![S4/HANA Cost-optimized Cluster Setup 33](https://www.esds.co.in/kb/wp-content/uploads/2022/03/33.png)
10.2 Configure cluster resources
![S4/HANA Cost-optimized Cluster Setup 34](https://www.esds.co.in/kb/wp-content/uploads/2022/03/34.png)
![S4/HANA Cost-optimized Cluster Setup 35](https://www.esds.co.in/kb/wp-content/uploads/2022/03/35.png)
![S4/HANA Cost-optimized Cluster Setup 36](https://www.esds.co.in/kb/wp-content/uploads/2022/03/36.png)
![S4/HANA Cost-optimized Cluster Setup 37](https://www.esds.co.in/kb/wp-content/uploads/2022/03/37.png)
10.3 Check status
![S4/HANA Cost-optimized Cluster Setup 38](https://www.esds.co.in/kb/wp-content/uploads/2022/03/38.png)
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