In this article, we will discuss how to configure Always On Availability Groups in SQL Server. Always On Availability Groups is a high availability and disaster recovery solution that provides database mirroring and automatic failover capabilities.
Step 1: Install SQL Server
The first step is to install SQL Server on the servers that will host the Availability Groups. This can be done by following the installation instructions provided by Microsoft. Make sure to install SQL Server on all the nodes that will be part of the Availability Group.
Step 2: Configure Pacemaker Cluster
Pacemaker is an open-source high availability cluster resource manager that is used to detect node and resource level failures and move resources to the active and healthy node in the Availability Group. Install Pacemaker on all the nodes and configure the cluster by following the instructions provided by the Pacemaker documentation.
Step 3: Create Always On Availability Groups
Once SQL Server and Pacemaker are installed and configured, you can create the Always On Availability Groups. This can be done by executing the necessary T-SQL scripts on the primary node. The scripts will create the necessary certificates, endpoints, and availability group configurations.
Step 4: Create Pacemaker Cluster Resources
After creating the Availability Groups, you need to create Pacemaker cluster resources for the Availability Group to failover automatically. This can be done by executing the necessary commands on the active node. The commands will create resources for the Availability Group and configure the virtual IP address.
Step 5: Test Failover
Once the configuration is complete, you can test the failover by manually moving the Availability Group to another node using the Pacemaker cluster. This can be done by executing the necessary commands on the active node. The commands will initiate the failover process and move the Availability Group to the specified node.
By following these steps, you can configure Always On Availability Groups in SQL Server using Pacemaker cluster. This will ensure high availability and automatic failover for your databases.
If you have any questions or need further assistance, please feel free to ask in the comment section below.