Terraform 0.12 (#20)

* Terraform 0.12

README.md

@@ -3,6 +3,10 @@
 * These files are part of my Udemy course about Terraform
 * Course URL: https://www.udemy.com/learn-devops-infrastructure-automation-with-terraform/?couponCode=TERRAFORM_GIT
 
+# Compatibility
+
+* This is the >=terraform-0.12 branch. For compatibility with older versions, use the terraform-0.11 branch.
+
 # Demo overview
 Demo Directory | Description
 ------------ | -------------

demo-1/instance.tf

@@ -1,4 +1,5 @@
 resource "aws_instance" "example" {
-  ami           = "${lookup(var.AMIS, var.AWS_REGION)}"
+  ami           = var.AMIS[var.AWS_REGION]
   instance_type = "t2.micro"
 }
+

demo-1/provider.tf

@@ -1,6 +1,6 @@
 provider "aws" {
-    access_key = "${var.AWS_ACCESS_KEY}"
-    secret_key = "${var.AWS_SECRET_KEY}"
-    region = "${var.AWS_REGION}"
+  access_key = var.AWS_ACCESS_KEY
+  secret_key = var.AWS_SECRET_KEY
+  region     = var.AWS_REGION
 }
 

demo-1/vars.tf

@@ -1,13 +1,19 @@
-variable "AWS_ACCESS_KEY" {}
-variable "AWS_SECRET_KEY" {}
+variable "AWS_ACCESS_KEY" {
+}
+
+variable "AWS_SECRET_KEY" {
+}
+
 variable "AWS_REGION" {
   default = "eu-west-1"
 }
+
 variable "AMIS" {
-  type = "map"
+  type = map(string)
   default = {
     us-east-1 = "ami-13be557e"
     us-west-2 = "ami-06b94666"
     eu-west-1 = "ami-0d729a60"
   }
 }
+

demo-1/versions.tf

@@ -0,0 +1,4 @@
+
+terraform {
+  required_version = ">= 0.12"
+}

demo-10/cloudinit.tf

@@ -1,29 +1,30 @@
 data "template_file" "init-script" {
-  template = "${file("scripts/init.cfg")}"
-  vars {
-    REGION = "${var.AWS_REGION}"
+  template = file("scripts/init.cfg")
+  vars = {
+    REGION = var.AWS_REGION
   }
 }
+
 data "template_file" "shell-script" {
-  template = "${file("scripts/volumes.sh")}"
-  vars {
-    DEVICE = "${var.INSTANCE_DEVICE_NAME}"
+  template = file("scripts/volumes.sh")
+  vars = {
+    DEVICE = var.INSTANCE_DEVICE_NAME
   }
 }
-data "template_cloudinit_config" "cloudinit-example" {
 
-  gzip = false
+data "template_cloudinit_config" "cloudinit-example" {
+  gzip          = false
   base64_encode = false
 
   part {
     filename     = "init.cfg"
     content_type = "text/cloud-config"
-    content      = "${data.template_file.init-script.rendered}"
+    content      = data.template_file.init-script.rendered
   }
 
   part {
     content_type = "text/x-shellscript"
-    content      = "${data.template_file.shell-script.rendered}"
+    content      = data.template_file.shell-script.rendered
   }
-
 }
+

demo-10/instance.tf

@@ -1,33 +1,32 @@
 resource "aws_instance" "example" {
-  ami           = "${lookup(var.AMIS, var.AWS_REGION)}"
+  ami           = var.AMIS[var.AWS_REGION]
   instance_type = "t2.micro"
 
   # the VPC subnet
-  subnet_id = "${aws_subnet.main-public-1.id}"
+  subnet_id = aws_subnet.main-public-1.id
 
   # the security group
-  vpc_security_group_ids = ["${aws_security_group.allow-ssh.id}"]
+  vpc_security_group_ids = [aws_security_group.allow-ssh.id]
 
   # the public SSH key
-  key_name = "${aws_key_pair.mykeypair.key_name}"
+  key_name = aws_key_pair.mykeypair.key_name
 
   # user data
-  user_data = "${data.template_cloudinit_config.cloudinit-example.rendered}"
-
+  user_data = data.template_cloudinit_config.cloudinit-example.rendered
 }
 
 resource "aws_ebs_volume" "ebs-volume-1" {
-    availability_zone = "eu-west-1a"
-    size = 20
-    type = "gp2" 
-    tags {
-        Name = "extra volume data"
-    }
+  availability_zone = "eu-west-1a"
+  size              = 20
+  type              = "gp2"
+  tags = {
+    Name = "extra volume data"
+  }
 }
 
 resource "aws_volume_attachment" "ebs-volume-1-attachment" {
-  device_name = "${var.INSTANCE_DEVICE_NAME}"
-  volume_id = "${aws_ebs_volume.ebs-volume-1.id}"
-  instance_id = "${aws_instance.example.id}"
+  device_name = var.INSTANCE_DEVICE_NAME
+  volume_id   = aws_ebs_volume.ebs-volume-1.id
+  instance_id = aws_instance.example.id
 }
 

demo-10/key.tf

@@ -1,4 +1,5 @@
 resource "aws_key_pair" "mykeypair" {
-  key_name = "mykeypair"
-  public_key = "${file("${var.PATH_TO_PUBLIC_KEY}")}"
+  key_name   = "mykeypair"
+  public_key = file(var.PATH_TO_PUBLIC_KEY)
 }
+

demo-10/provider.tf

@@ -1,3 +1,4 @@
-provider "aws" { 
-    region = "${var.AWS_REGION}"
+provider "aws" {
+  region = var.AWS_REGION
 }
+

demo-10/securitygroup.tf

@@ -1,21 +1,22 @@
 resource "aws_security_group" "allow-ssh" {
-  vpc_id = "${aws_vpc.main.id}"
-  name = "allow-ssh"
+  vpc_id      = aws_vpc.main.id
+  name        = "allow-ssh"
   description = "security group that allows ssh and all egress traffic"
   egress {
-      from_port = 0
-      to_port = 0
-      protocol = "-1"
-      cidr_blocks = ["0.0.0.0/0"]
+    from_port   = 0
+    to_port     = 0
+    protocol    = "-1"
+    cidr_blocks = ["0.0.0.0/0"]
   }
 
   ingress {
-      from_port = 22
-      to_port = 22
-      protocol = "tcp"
-      cidr_blocks = ["0.0.0.0/0"]
-  } 
-tags {
+    from_port   = 22
+    to_port     = 22
+    protocol    = "tcp"
+    cidr_blocks = ["0.0.0.0/0"]
+  }
+  tags = {
     Name = "allow-ssh"
   }
 }
+

demo-10/vars.tf

@@ -1,20 +1,25 @@
 variable "AWS_REGION" {
   default = "eu-west-1"
 }
+
 variable "PATH_TO_PRIVATE_KEY" {
   default = "mykey"
 }
+
 variable "PATH_TO_PUBLIC_KEY" {
   default = "mykey.pub"
 }
+
 variable "AMIS" {
-  type = "map"
+  type = map(string)
   default = {
     us-east-1 = "ami-13be557e"
     us-west-2 = "ami-06b94666"
     eu-west-1 = "ami-844e0bf7"
   }
 }
+
 variable "INSTANCE_DEVICE_NAME" {
   default = "/dev/xvdh"
 }
+

demo-10/versions.tf

@@ -0,0 +1,4 @@
+
+terraform {
+  required_version = ">= 0.12"
+}