first commit

.gitignore

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+.terraform
+terraform*
+

README.md

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+terraform-aws-ami-ids
+================
+
+Terraform module to lookup AMI IDs for use in other resources
+
+Usage
+-----
+
+```hcl
+module "ami_id" {
+  source =
+  distribution = "ecs"
+}
+```

main.tf

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+# Lookups on marketplace seem slower than others
+
+locals {
+  names = "amazonlinux,ecs,ubuntu1604"
+
+  owners = "${join(",", list(
+    var.ami_owners["amazon"],
+    var.ami_owners["amazon"],
+    var.ami_owners["canonical"]
+  ))}"
+
+  patterns = "${join(",", list(
+    "amzn-ami-hvm-*-x86_64-gp2",
+    "amzn-ami-${var.ami_version_ecs}-amazon-ecs-optimized",
+    "ubuntu/images/hvm-ssd/ubuntu-xenial-16.04-amd64-server-*"
+  ))}"
+}
+
+# CentOS: CentOS Linux 7 x86_64 HVM EBS*
+# Fedora: Fedora-Cloud-Base-27-1.6.x86_64-us-west-2-HVM-gp2-0
+
+data "aws_ami" "ami" {
+  count       = "${length(split(",", local.names))}"
+  most_recent = true
+  owners      = ["${element(split(",", local.owners),count.index)}"]
+
+  filter {
+    name   = "name"
+    values = ["${element(split(",", local.patterns),count.index)}"]
+  }
+
+  filter {
+    name   = "architecture"
+    values = ["x86_64"]
+  }
+
+  filter {
+    name   = "virtualization-type"
+    values = ["hvm"]
+  }
+}

outputs.tf

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+output "ami_id" {
+  description = "AMI ID for Linux distribution"
+  value       = "${element(data.aws_ami.ami.*.id, index(split(",", local.names), var.distribution))}"
+}
+
+output "ami_ids" {
+  description = "All AMI IDs"
+  value       = "${data.aws_ami.ami.*.id}"
+}
+
+output "ami_names" {
+  description = "All AMI Names"
+  value       = "${data.aws_ami.ami.*.name}"
+}
+
+output "distro_names" {
+  description = "All distribution names. Can be used to index the other lists"
+  value       = "${split(",", local.names)}"
+}

variables.tf

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+variable "ami_owners" {
+  description = "AMI Owner IDs"
+  type        = "map"
+
+  default = {
+    amazon    = "amazon"
+    centos    = "679593333241" # Marketplace
+    canonical = "099720109477"
+    fedora    = "125523088429"
+  }
+}
+
+variable "ami_version_ecs" {
+  description = "Amazon ECS Optimized version to get"
+  default     = "*"
+}
+
+variable "distribution" {
+  description = "Linux distribution for AWS AMI, supported: amazonlinux, ecs, ubuntu1604"
+}