A large IT company has used AWS ECS to deploy dozens of Microservices. There is a new requirement from management to report any state change of either ECS container instances or ECS tasks to a group channel in Microsoft Teams. The notification messages should be nicely readable and sent immediately whenever a status change happens. Which two methods in combinations can achieve this requirement? (Select TWO)

Answer options:

A.Create a T2 micro instance to handle the customized notifications. Integrate with Microsoft Teams via its Incoming Webhook.
B.Add a new CloudWatch Events rule for status change of ECS. Add a Lambda function as the target when an event is triggered.
C.Configure a new SNS topic called ECS_Status_Change. Register the SNS as the trigger of a Lambda function to generate custom readable alarms.
D.Set up alarms in ECS CloudWatch Metrics. When the state of either ECS instance or ECS task changes, generate an alarm to trigger an SNS topic.
E.Create a Lambda function to analyze the state change event in ECS and then provide an appropriate message to the channel in Microsoft Teams.

Correct Answer – B, E
In this case, notifications are expected to be sent immediately when there is a state change for ECS. CloudWatch Events should be considered as it integrates with ECS and can trigger a CloudWatch Event for its target. About the examples of Amazon ECS CloudWatch events, please refer to
https://docs.aws.amazon.com/AmazonECS/latest/developerguide/ecs_cwe_events.html.
Option A is incorrect: Because there is no other option that helps to trigger the EC2 instance to process the notifications.
Option B is CORRECT: Because CloudWatch Events can trace the status change of both ECS container instance and ECS task as below:
Option C is incorrect: Option B already states that the target is Lambda. Therefore this option cannot work with Option
B.Option D is incorrect: Because it is not straightforward to use CloudWatch Metrics to track the state change. There are no proper metrics to indicate that a status change has happened clearly. Check
https://docs.aws.amazon.com/AmazonECS/latest/developerguide/cloudwatch-metrics.html
for the supported ECS Metrics in CloudWatch.
Option E is CORRECT: Because Lambda provides the computer function to generate messages. Together with Option B, the required features can be achieved.