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feat: support resolve: prefixed ami for launch-time resolution #4

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Merged
sgtoj merged 1 commit into from
Oct 28, 2026
Merged

feat: support resolve: prefixed ami for launch-time resolution #4

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4 changes: 3 additions & 1 deletion main.tf
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,8 @@ locals {
enabled = var.ssm_sessions.enabled
logs_bucket_name = try(coalesce(var.ssm_sessions.logs_bucket_name, var.logs_bucket_name), "")
}

image_id = var.ami != "" ? var.ami : data.aws_ssm_parameter.linux_ami.value
}

data "aws_partition" "current" {}
Expand All @@ -37,7 +39,7 @@ module "proxy" {
source = "cloudposse/ec2-autoscale-group/aws"
version = "0.41.1"

image_id = data.aws_ssm_parameter.linux_ami.value
image_id = local.image_id
instance_type = "t3.nano"
health_check_type = "ELB"
user_data_base64 = base64encode(module.this.enabled ? data.cloudinit_config.this[0].rendered : "")
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11 changes: 11 additions & 0 deletions variables.tf
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Expand Up @@ -27,6 +27,17 @@ variable "capacity" {
default = {}
}

variable "ami" {
type = string
description = "AMI ID to launch instances with. Accepts an explicit `ami-*` ID or a `resolve:ssm:*` reference that EC2 resolves at instance launch time. Defaults to the latest Amazon Linux 2023 AMI resolved at apply time when empty."
default = ""

validation {
condition = var.ami == "" || startswith(var.ami, "ami-") || startswith(var.ami, "resolve:")
error_message = "The ami value must be empty, an explicit `ami-*` ID, or a `resolve:*` reference."
}
}

variable "instance_types" {
type = list(object({
type = string
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