You are setting up cloudformation templates for your organization.
The cloudformation template consists of creating EC2 Instances for both your development and production environments in the same region.
Each of these instances will have an Elastic IP and a security group attached to them which will be done via Cloudformation.
Your cloudformation stack for the development environment gets successfully created, but then the production cloudformation stack fails.
Which of the below could be a reason for this.
Click on the arrows to vote for the correct answer
A. B. C. D.Answer - B.
The most viable reason could be that you reached the limit for the number of Elastic IP's in the region.
For more information on AWS EC2 service limits, please refer to the below link:
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-resource-limits.htmlThe reason for the failure of the production cloudformation stack could be option B, which states that you have hit the soft limit of 5 Elastic IPs per region when creating the development environment.
Amazon Web Services imposes soft limits on various resources to prevent abuse and ensure availability for all customers. Elastic IPs are one such resource. By default, each AWS account is allowed a maximum of 5 Elastic IPs per region. If you try to create more than 5 Elastic IPs in a region, you will receive a message saying that you have reached the limit.
Since you are creating Elastic IPs for both development and production environments in the same region, it is possible that you have exhausted the limit of 5 Elastic IPs in the region while creating the development environment stack. This could have led to the failure of the production stack, as it would not be able to create the required Elastic IPs.
Option A, which states that you have chosen the wrong tags when creating the instances in both environments, is unlikely to cause the failure of the production stack unless the tags are critical for the stack's creation. Cloudformation templates typically use tags for resource organization and management, but incorrect tags should not cause a stack creation failure.
Option C, which states that you hit the soft limit for security groups when creating the development environment, is also unlikely to be the cause of the failure. AWS allows up to 500 security groups per VPC by default, and you would need to create a significant number of security groups to hit the limit.
Option D, which states that you didn't choose the Production version of the AMI you are using when creating the production stack, is also unlikely to be the cause of the failure unless the AMI version is critical for the stack creation. If the AMI is not specified correctly, the instance created might not have the required software and configurations, but this would not necessarily cause the stack creation to fail.