AWS CodeDeploy deployment fails to start & generates the following error code, ”HEALTH_CONSTRAINTS_INVALID.” Which of the following can be used to eliminate this error?

Answer options:

A.Make sure that the minimum number of healthy instances is equal to the total number of instances in the deployment group.
B.Increase the number of healthy instances required during deployment.
C.Reduce number of "healthy instances required" to less than the total number of instances.
D.Make sure that the minimum number of healthy instances is greater than the number of instances in the deployment group.

Correct Answer – C
AWS CodeDeploy generates ”HEALTH_CONSTRAINTS_INVALID” error, when a minimum number of healthy instances defined in the deployment group are not available during deployment. To mitigate this error, make sure the required number of healthy instances are available during deployments.
Option A is incorrect as During Deployment process, CodeDeploy tracks the health status of the instances in a deployment group. It uses the deployment`s specified minimum number of healthy instances to determine whether to continue the deployment. For this, a minimum number of healthy instances should be less than & not equal to the total number of instances in the deployment group.
Option B is incorrect as to continue with deployment, you should increase the total number of instances in a deployment group compared to a minimum number of healthy instances.
Option D is incorrect. The number of healthy instances should be greater than & not equal or less than a number of healthy instances specified in a minimum number of healthy instances.
For more information on AWS CodeDeploy Error Codes, refer to the following URL-
https://docs.aws.amazon.com/codedeploy/latest/userguide/error-codes.html