Install the Failover Clustering feature

Install the Failover Clustering feature

1. Start Server Manager.
2. On the Manage menu, select Add Roles and Features.
3. On the Before you begin page, select Next.
4. On the Select installation type page, select Role-based or feature-based installation, and then select Next.
5. On the Select destination server page, select the server where you want to install the feature, and then select Next.
6. On the Select server roles page, select Next.
7. On the Select features page, select the Failover Clustering check box.
8. To install the failover cluster management tools, select Add Features, and then select Next.
9. On the Confirm installation selections page, select Install.
   A server restart is not required for the Failover Clustering feature.
10. When the installation is completed, select Close.
11. Repeat this procedure on every server that you want to add as a failover cluster node.

Sources:

https://docs.microsoft.com/en-us/windows-server/failover-clustering/create-failover-cluster