Invoking the Hello World application

To invoke the hello-world service in a browser, we will use the public DNS of the application load balancer registered with the service. In the EC2 dashboard, select the Target Groups | hello-world-tg target group, and then select Targets. Initially, when the target group was created, the Targets tab did not list any targets. But after creating and configuring the service with the load balancer, the Targets tab lists the three IP addresses for the three tasks in the hello-world-tg service, as shown in the following screenshot:

Two of the tasks are in one availability zone and the third is in another availability zone, as shown in the following screenshot:

1. Obtain the DNS name for the application load balancer from the Load Balancers console, as shown in the following screenshot:

2. Open the DNS name in a browser to invoke the Hello World application, as shown in the following screenshot:

Invoking the DNS name for the load balancer forwards the request to the...