README: Note that RHEL 7 not supported, remove upstream role paths

README.md

@@ -340,22 +340,25 @@ Type: `string`
 
 ### `mssql_ha_configure`
 
-Use variables with the 'mssql_ha_' prefix to configure an SQL Server Always On
+Use the variables with the 'mssql_ha_' prefix to configure an SQL Server Always On
 availability group to provide high availability.
 
+Configuring for high availability is not supported on RHEL 7 because the
+System Roles ha_cluster role does not support RHEL 7.
+
 Set to `true` to configure for high availability. Setting to `false` does not
 remove configuration for high availability.
 
 When set to `true`, the role performs the following tasks:
-1. Include the fedora.linux_system_roles.firewall role to configure firewall:
+1. Include the System Roles firewall role to configure firewall:
 1.1. Open the firewall port set with the `mssql_ha_listener_port` variable.
 1.2. Enable the `high-availability` service in firewall.
 2. Configure SQL Server for high availability:
 2.1. Enable AlwaysOn Health events.
 2.2. Create certificate on the primary replica and distribute to other replicas.
 2.3. Configure endpoint and availability group.
 2.4. Configure the pacemaker user.
-3. Include the fedora.linux_system_roles.ha_cluster role to configure pacemaker.
+1. Include the System Roles ha_cluster role to configure pacemaker.
 
 Default: `false`