Ec2 instance unfound

Your instance appears to be immediately terminating for some reason.

Use the describe-instances command specifying your instance id to get the termination reason. Run the following command, replacing [instance_id} with the id you noted above.

aws ec2 describe-instances --instance-id [instance_id] --output json

This should tell you more about why the instance isn't launching.

There are a few different reasons why this could occur. You can see a more comprehensive list in Why can't I start or launch my EC2 instance? KnowledgeCenter Post

References:

• Why can't I start or launch my EC2 instance? KnowledgeCenter Post
• Instance terminates immediately - Amazon EC2 User Guide