************* version 2.0 *************
I am sharing the updated cluster_v2.sh script (Version 2.0) which now includes new configurations.
Added another option to choose the type of azure fencing agent :
- service principal
- managed Identity
Setting up Pacemaker on Red Hat Enterprise Linux in Azure
The script performs the steps outlined in the provided documentation:
Setting up Pacemaker on RHEL in Azure | Microsoft Learn URL: https://learn.microsoft.com/en-us/azure/sap/workloads/high-availability-guide-rhel-pacemaker?tabs=spn
Azure SAP Pacemaker MSI SPN (microsoft.com) https://techcommunity.microsoft.com/t5/running-sap-applications-on-the/sap-on-azure-high-availability-change-from-spn-to-msi-for/ba-p/3609278
Usage:
The script will do the following:
- It will ask user to provide the username and password, which will be used for accessing the cluster nodes.
- Create resource group, VNET and 2 VM’s.
- By default it uses redhat 8.2 for SAP( RedHat:RHEL-SAP-HA:8.2:latest), you can use any other sap image by adding the option -i and image Urn. Ex: ./cluster_v2.sh -i RedHat:RHEL-SAP-HA:8_6:latest
- Starting a custom script extension to configure:
- Install cluster packages, configure firewall rules and start the pacemaker service on both the nodes.
- Configure/create pacemaker cluster on node1.
- Create fencing device using Managed identity.
- Configuring fence_kdump on both nodes.
- Updating NSGs with public IP and allowing ssh access.
- Script takes approximately 10-15 minutes to deploy the cluster.
Tools required to run it:
- WSL (windows subsystem for Linux) or any Linux system.
- Azure CLI installed on the machine and already logged in.
limitations:
- The script has been written for RHEL on SAP images for both RHEL 7 and 8 versions. However, there are repository issues with RHEL 7 images, and the cluster packages couldn't be installed. Therefore, please use RHEL 8 images for now, and I will update you once the issue is fixed for RHEL 7.
- The VM names cannot be changed because there is a dependency on the scripts that configure the cluster based on the hostname.