Installation
08/26/2025 To install a SQL Server failover cluster, you must create and configure a failover cluster instance by running SQL Server Setup. To install a failover cluster, y
To install a SQL Server failover cluster, you must create and configure a failover cluster instance
by running SQL Server Setup.
To install a failover cluster, you must use a domain account that has local administrator rights
and permission to sign on as a service and act as part of the operating system on all nodes in
the failover cluster.
- To install, configure, and maintain a SQL Server failover cluster, use SQL Server Setup.
Identify the information you need to create your failover cluster instance (for
example, cluster disk resource, IP addresses, and network name) and the nodes
available for failover. For more information, see:
Before installing failover clustering
Security considerations for a SQL Server installation
You must complete the configuration steps before you run the SQL Server Setup
program. Use the Windows Cluster Administrator to complete them. You must have
one Windows server failover cluster group for each failover cluster instance that you
want to configure.
You must ensure that your system meets minimum requirements. For more
information on specific requirements for a SQL Server failover cluster, see
Before
installing failover clustering.
- Add or remove nodes from a failover cluster configuration without affecting the other
cluster nodes. For more information, see
Add or remove nodes in a SQL Server failover
cluster (Setup).
All nodes in a failover cluster must be of the same platform, either 32-bit or 64-bit,
and must run the same operating system edition and version. Also, 64-bit SQL
Server editions must be installed on 64-bit hardware running the 64-bit versions of
Windows operating systems. There’s no WoW64 support for failover clustering in
this release.