Updating an existing stack with a new CloudFormation template

Last Updated : Jun 10, 2026 |

About this task

You can apply changes to an existing CloudFormation stack by updating the stack with a newer CloudFormation template. Changes to the stack can include additional nodes, new resources, and new port configuration. The system updates all the objects contained in the stack to match the new settings. Existing EBS volumes and S3 buckets are preserved.

To update an existing single-node stack you must use a new single-node stack template. To update an existing cluster you must use a new multi-node stack template. If you are expanding a cluster, you must already have a cluster with two or more nodes. You cannot expand a single AWS node into an AWS cluster

Before you begin

Generate a new CloudFormation template that matches the application and profile of the existing system but includes the additional resources required. For more information, see the Creating CloudFormation templates section in Deploying the Avaya Aura® Web Gateway.

Procedure

  1. Sign in to the AWS console.
  2. Navigate to Services > Management Tools > CloudFormation.
  3. Select the stack to update.
  4. Click Actions > Update Stacks.
  5. Update the stack using the Update Stack pages.

    You can add an additional CIDR block when going from two to three subnets. Do not change the value of any other stack parameters.