Can not create an aws nitro enclave instance

Question

Hi,

I am trying to create a nitro enclave instance with T3.large and C5.small, which are all supported by nitro hypervisor. However, when i enabled nitro, i can not create the instance with errors bellow:

Instance launch failed
You cannot enable Nitro Enclaves for "t3.large" instance types. Specify a supported instance type and try again.

Launch log
Initializing requests
Succeeded
Creating security groups
Succeeded
Creating security group rules
Succeeded
Launch initiation
Failed

Can anyone help me?

Accepted Answer

T3 instances are indeed compatible with Nitro-based ones.  
https://docs.aws.amazon.com/enclaves/latest/user/nitro-enclave.html#nitro-enclave-reqs

However, as described in this document, nitro enclave cannot be used in T3.  
The following requirements must be supported by the instance type.  
https://docs.aws.amazon.com/enclaves/latest/user/nitro-enclave.html#nitro-enclave-reqs  
> Nitro Enclaves has the following requirements:
> 
> Parent instance requirements:
> 
> Virtualized Nitro-based instance
> 
> Intel or AMD-based instances with at least 4 vCPUs, excluding T3, T3a, and u-*
> 
> AWS Graviton-based instances with at least 2 vCPUs, excluding A1, T4g, G5g, Im4gn, and Is4gen
> 
> Linux or Windows (2012 R2 or later) operating system
> 
> Enclave requirements:
> 
> Linux operating system only

Can not create an aws nitro enclave instance

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