Retrieving ECS-Optimized-AMI from ssm using terraform
We can use a datasource of aws_ami to retrieve image id.
Now AWS SSM Parameter Store allows for querying the latest Amazon Linux AMI. Therefore I try more simpler way.
terraform versions
$ terraform -v
Terraform v0.12.16
+ provider.aws v2.40.0Create a module
data aws_ssm_parameter this {
name = "/aws/service/ecs/optimized-ami/${join("/", compact([var.os, var.architecture]))}/recommended"
}
variable os {
default = "amazon-linux-2"
}
variable architecture {
default = ""
}
output value {
value = jsondecode(data.aws_ssm_parameter.this.value)
}Using the module
terraform {
required_version = "~> 0.12.0"
}
provider "aws" {
region = "ap-northeast-1"
}
module amazon_linux_2 {
source = "../"
}
output amazon_linux_2 {
value = module.amazon_linux_2.value
}Outputs:
amazon_linux_2 = {
"ecs_agent_version" = "1.33.0"
"ecs_runtime_version" = "Docker version 18.06.1-ce"
"image_id" = "ami-0934e28fe3e390537"
"image_name" = "amzn2-ami-ecs-hvm-2.0.20191114-x86_64-ebs"
"os" = "Amazon Linux 2"
"schema_version" = 1
}