Question 1

How do I create a spot instance with terraform-aws-ec2-instance?

Accepted Answer

Set create_spot_instance = true and configure spot_price, spot_type, and other spot-specific variables in the module block. The README provides a complete example with persistent spot instances.

Question 2

What happens if I use network_interface with other network settings in this module?

Accepted Answer

It will cause conflicts because network_interface cannot be specified together with vpc_security_group_ids, associate_public_ip_address, or subnet_id, as noted in the README. You need to choose one approach or use workarounds.

Question 3

How to attach multiple EBS volumes to an instance using this module?

Accepted Answer

Use the ebs_volumes input variable, which accepts a map of volume configurations including size, type, and device names. The module handles the creation and attachment automatically.

Question 4

Does terraform-aws-ec2-instance support encrypted AMIs?

Accepted Answer

Not directly; the module requires you to create encrypted AMIs separately using resources like aws_ami_copy, as shown in the README example. This adds extra steps for compliance-driven use cases.

Question 5

terraform-aws-ec2-instance vs raw aws_instance resource: which should I use?

Accepted Answer

Use the module for reduced boilerplate and best practices in most scenarios, but opt for raw aws_instance if you need fine-grained control or have unique requirements not covered by the module's abstractions.

Question 6

How to conditionally create an IAM instance profile with this module?

Accepted Answer

Set create_iam_instance_profile = true to auto-create one, or provide an existing profile via iam_instance_profile. The module includes role and policy attachments based on iam_role_policies input.

terraform-aws-ec2-instance

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