In Ambari Web, click Alerts.

On the Alerts page, click the Actions menu, then click Manage Alert Groups.

In Manage Alert Groups, click + to create a new alert notification.

In, Create Alert Group, enter a group name and click Save.

By clicking on the custom group in the list, you can add or delete alert definitions from this group, and change the notification targets for the group.

When you finish your assignments, click Save.