EC2 InvalidLaunchTemplateID.NotFound

What is EC2 InvalidLaunchTemplateID.NotFound

Understanding EC2 Launch Templates

Amazon EC2 (Elastic Compute Cloud) is a web service that provides resizable compute capacity in the cloud. One of its features, Launch Templates, allows users to create pre-configured templates for launching EC2 instances. These templates can include instance type, key pairs, security groups, and other configurations, making it easier to manage and deploy instances consistently.

Recognizing the Symptom

When working with EC2 Launch Templates, you might encounter the error code InvalidLaunchTemplateID.NotFound. This error indicates that the specified launch template ID does not exist or is incorrect. As a result, you will be unable to launch an instance using this template.

Details About the Issue

The error InvalidLaunchTemplateID.NotFound typically occurs when the launch template ID provided in your request is either incorrect or refers to a template that has been deleted. This can happen if there is a typo in the ID, if the template was removed, or if you are referencing a template from a different AWS region.

Common Causes

Typographical errors in the launch template ID. The launch template has been deleted. Attempting to access a launch template in a different region.

Steps to Fix the Issue

To resolve the InvalidLaunchTemplateID.NotFound error, follow these steps:

Step 1: Verify the Launch Template ID

Ensure that the launch template ID you are using is correct. You can list all available launch templates in your AWS account by using the AWS CLI:

aws ec2 describe-launch-templates

This command will return a list of all launch templates, including their IDs. Verify that the ID you are using matches one of the IDs in the list.

Step 2: Check for Deletion

If the launch template ID is correct, check if the template has been deleted. You can do this by reviewing the AWS Management Console or using the AWS CLI to list templates, as shown above.

Step 3: Confirm the AWS Region

Ensure that you are operating in the correct AWS region. Launch templates are region-specific, and referencing a template from a different region will result in this error. You can set the region in the AWS CLI with:

aws configure set region

Additional Resources

For more information on managing EC2 Launch Templates, you can refer to the AWS EC2 Launch Templates Documentation. If you continue to experience issues, consider reaching out to AWS Support for further assistance.