Windows 2019
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SQL Server 2019 : Failover Cluster Instance #12021/02/05
 
Configure SQL Server Failover Cluster Instance (FCI).
This example is based on the environment with 2 SQL Servers like follows.
(possible to configure with more than 3 SQL Servers) 
                                   |
+----------------------+           |           +----------------------+
|  [      AD DS     ]  |10.0.0.100 | 10.0.0.109|  [  iSCSI Target  ]  |
|    fd3s.srv.world    +-----------+-----------+    tgt01.srv.world   |
|                      |           |           |                      |
+----------------------+           |           +----------------------+
                                   |
+----------------------+           |           +----------------------+
|  [ SQL Server #1 ]   |10.0.0.101 | 10.0.0.102|  [ SQL Server #2 ]   |
|    rx-7.srv.world    +-----------+-----------+    rx-8.srv.world    |
|                      |                       |                      |
+----------------------+                       +----------------------+
[1]
Configure Windows Server Failover Clustering (WSFC) on all Nodes you plan to configure Failover Cluster Instance, refer to here.
[2]
Create a domain user account on AD DS for SQL Server, refer to here.
Also add the user in [Domain Admins] group. It creates [SQLAdmin] user on this example.
[3]
Install SQL Server Failover Cluster Instance on a primary Node.
Only different sections from common StandAlone installation are shown below.
Run SQL Server installation program [setup.exe] and click [New SQL Server failover cluster installation].
[4] On the section below, Set [SQL Server Network Name]. Input any name you like.
[5] On the section below, Set Cluster Resource Group.
[6] On the section below, Select Cluster Disk for SQL Server Databases. It's possible to select shared storages you configured on WSFC settings.
[7] On the section below, Configure Cluster Network. Set an free IP address to use for SQL Server Failover Cluster Instance.
[8] On the section below, Configure service accounts. For [SQL Server Database Engine], [SQL Server Agent], [SQL Server Analysis Service], specify AD domain account created on [2] for them.
[9]
For others, they are the same procedures with StandAlone installation.
After installing, Proceed to the secondary Node installation.
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