Applying a SQL Service Pack or Hotfix in a 2-Node
Active/Passive SQL Cluster Environment
When managing a SQL Server Cluster, applying service packs or hotfixes requires careful execution to avoid downtime and ensure high availability. Follow this step-by-step guide to apply a SQL Service Pack (SP) or hotfix in a 2-node Active/Passive SQL Cluster environment.
Cluster Configuration:
Active SQL Server: SQLDBANOWDBALABS
Passive SQL Server: SQLDBANOWDBALABS-DR
Step by Step update Process:-
1. Apply the SQL Service Pack on the Passive Server
Log in to SQLDBANOWDBALABS-DR (Passive Node).
Initiate the SQL Service Pack/Hotfix installation.
Follow the installation wizard, ensuring all necessary
components are updated.
Once the installation is complete, restart the Passive Node if prompted.
2. Failover SQL Cluster to the Passive Server
Open Failover Cluster Manager.
Select the SQL Server Cluster Role (SQLDBANOWDBALABS
instance).
Initiate a failover to move the active role to the Passive Node (SQLDBANOWDBALABS-DR).
Post Failover:
New Active Server: SQLDBANOWDBALABS-DR
New Passive Server: SQLDBANOWDBALABS
3. Apply the SQL Service Pack on the New Passive Server
Log in to SQLDBANOWDBALABS (Now Passive Node).
Initiate the SQL Service Pack/Hotfix installation.
Follow the installation wizard and complete the update
process.
Restart the server if prompted.
4. Failback SQL Cluster to the Original Active Server
Open Failover Cluster Manager.
Select the SQL Server Cluster Role (SQLDBANOWDBALABS-DR
instance).
Initiate a failover to move the active role back to SQLDBANOWDBALABS.
Post Failback:
Active Server: SQLDBANOWDBALABS
Passive Server: SQLDBANOWDBALABS-DR
5. Perform Post-Upgrade Health Checks
Verify SQL Cluster Services:
Ensure all cluster resources are online.
Check Failover Cluster Manager:
Validate Cluster Nodes’ status.
Ensure Cluster Disk Health is optimal.
Review SQL Server logs for any errors.
Test application connectivity and functionality.
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