Assume that you use AlwaysOn availability groups (AG) in SQL Server 2017 on a Pacemaker cluster. You may notice that Pacemaker fails to promote an AG replica to the master role and the following error message:

INFO: promote: ERROR: DateTime Could not promote local replica to PRIMARY role: RoleName: This operation cannot be performed on the availability group 'GroupName' because it has EXTERNAL cluster type. Use the cluster management tools to perform the operation.


A fix for this problem is included in Cumulative Update 7 for SQL Server 2017.

About SQL Server 2017 builds

Each new build for SQL Server 2017 contains all the hotfixes and security fixes that were in the previous build. We recommend that you install the latest build for SQL Server 2017.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


Learn about the standard terminology Microsoft uses to describe software updates.

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