ERROR:

AWS::CloudFormation::Stack	efstest	The following resource(s) failed to create: [Subnet1, MountTargetSecurityGroup, EC2InstanceProfile, Subnet2, FileSystem, GatewayToInternet, InstanceSecurityGroup]. 
CREATE_FAILED	AWS::EC2::Subnet	Subnet2	Template error: Fn::Select cannot select nonexistent value at index 1

How can I determine why this occurs? I see no conflicting resources...

can we monitor efs fs usage using cloudwatch or custom metrics ?

if it cross 4tb -we need to be alerted

How does one look at the template that corresponds to the designer id here?

https://github.com/awslabs/amazon-ecs-amazon-efs/blob/master/amazon-efs-ecs.json#L413

Hello,
Can someone please redo this template to make it more similar to the ecs-refarch-cloudformation sample template? This one here is very outdated and is one of very few that are in JSON format unlike YAML for most of the others. Thank you. in advance for your consideration.

When I run this script in cloud formation, the efs system mounts to the instance. However, the docker container itself does not seem to be linked with the instance efs.

Have you run into this problem?

aws cloudformation validate-template --template-body template.json returns the following

An error occurred (ValidationError) when calling the ValidateTemplate operation: Template format error: unsupported structure.