Added a aws_ami module.

main.tf

@@ -42,6 +42,10 @@ provider "aws" {
   region = "us-east-2"
 }
 
+module "aws-amis" {
+  source = "./modules/aws-amis"
+}
+
 module "aws-network" {
   source = "./modules/aws-network"
   name-prefix = var.vm-name-prefix
@@ -82,6 +86,10 @@ module "worker-nodes" {
   name-prefix        = "${var.vm-name-prefix}-worker"
 }
 
+output "amis" {
+  value = module.aws-amis.amis
+}
+
 ################################################################################
 # end aws
 ################################################################################

modules/aws-amis/main.tf

@@ -0,0 +1,58 @@
+locals {
+  amis = {
+    amzn2 = {
+      owner-id = "137112412989"
+      name = "amzn2-ami-hvm-2*x86_64-gp2"
+    },
+    ubuntu = {
+      owner-id = "099720109477"
+      name = "ubuntu/images/hvm-ssd/ubuntu-focal-20.04-amd64-server-*"
+    },
+    centos7 = {
+      owner-id = "125523088429"
+      name = "CentOS 7.*x86_64"
+    },
+    centos8 = {
+      owner-id = "125523088429"
+      name = "CentOS 8.*x86_64"
+    },
+    arch = {
+      owner-id = "093273469852"
+      name = "arch-linux-lts-hvm*x86_64-ebs"
+    },
+    rhel7 = {
+      owner-id = "309956199498"
+      name = "RHEL-7.*HVM*x86_64*GP2"
+    },
+    rhel8 = {
+      owner-id = "309956199498"
+      name = "RHEL-8.*HVM*x86_64*GP2"
+    }
+  }
+}
+
+data "aws_ami" "amis" {
+  for_each = local.amis
+  most_recent = true
+  owners = [each.value.owner-id]
+
+  filter {
+    name = "name"
+    values = [each.value.name]
+  }
+
+  filter {
+    name = "virtualization-type"
+    values = ["hvm"]
+  }
+
+  filter {
+    name = "architecture"
+    values = ["x86_64"]
+  }
+
+  filter {
+    name = "root-device-type"
+    values = ["ebs"]
+  }
+}

modules/aws-amis/outputs.tf

@@ -0,0 +1,3 @@
+output "amis" {
+  value = tomap({ for type, ami in data.aws_ami.amis : type => ami.id })
+}