Add the instance group to the backend pool

To add the instance group to the backend pool, perform the following steps:

1. Log in to the Google Cloud and select Compute Engine.

2. In the search bar, type load balancing and select your load balancer from the list.

   The Load balancer details page is displayed.

3. Click Edit and go to Backend configuration section.

4. In the Backend configuration section, go to Backends and click Add a backend.

5. Select the required Instance group from the drop-down and click Update.