Update code examples

code/ruby/07-testing-terraform-code/web-server-full-di.rb

@@ -22,39 +22,20 @@ def initialize(web_service)
   def handle(path)
     case path
     when "/"
-      self.hello
+      [200, 'text/plain', 'Hello, World']
     when "/api"
-      self.api
+      [201, 'application/json', '{"foo":"bar"}']
     when "/web-service"
-      self.web_service
-    else
-      self.not_found
-    end
-  end
-
-  def hello
-    [200, 'text/plain', 'Hello, World']
-  end
-
-  def api
-    [201, 'application/json', '{"foo":"bar"}']
-  end
-
+      # New endpoint that calls a web service
 =begin
-
-  def web_service
-    uri = URI("http://www.example.org")
-    response = Net::HTTP.get_response(uri)
-    [response.code.to_i, response['Content-Type'], response.body]
-  end
+      uri = URI("http://www.example.org")
+      response = Net::HTTP.get_response(uri)
+      [response.code.to_i, response['Content-Type'], response.body]
 =end
-
-  def web_service
-    @web_service.proxy
-  end
-
-  def not_found
-    [404, 'text/plain', 'Not Found']
+      @web_service.proxy
+    else
+      [404, 'text/plain', 'Not Found']
+    end
   end
 end
 

code/ruby/07-testing-terraform-code/web-server-full.rb

@@ -15,25 +15,13 @@ class Handlers
   def handle(path)
     case path
     when "/"
-      self.hello
+      [200, 'text/plain', 'Hello, World']
     when "/api"
-      self.api
+      [201, 'application/json', '{"foo":"bar"}']
     else
-      self.not_found
+      [404, 'text/plain', 'Not Found']
     end
   end
-
-  def hello
-    [200, 'text/plain', 'Hello, World']
-  end
-
-  def api
-    [201, 'application/json', '{"foo":"bar"}']
-  end
-
-  def not_found
-    [404, 'text/plain', 'Not Found']
-  end
 end
 
 # This will only run if this script was called directly from the CLI, but

code/ruby/08-terraform-team/web-server.rb

@@ -22,31 +22,15 @@ def initialize(web_service)
   def handle(path)
     case path
     when "/"
-      self.hello
+      [200, 'text/plain', 'Hello, World']
     when "/api"
-      self.api
+      [201, 'application/json', '{"foo":"bar"}']
     when "/web-service"
-      self.web_service
+      @web_service.proxy
     else
-      self.not_found
+      [404, 'text/plain', 'Not Found']
     end
   end
-
-  def hello
-    [200, 'text/plain', 'Hello, World']
-  end
-
-  def api
-    [201, 'application/json', '{"foo":"bar"}']
-  end
-
-  def web_service
-    @web_service.proxy
-  end
-
-  def not_found
-    [404, 'text/plain', 'Not Found']
-  end
 end
 
 class WebService

code/terraform/02-intro-to-terraform-syntax/webserver-cluster/main.tf

@@ -19,6 +19,12 @@ resource "aws_launch_configuration" "example" {
               echo "Hello, World" > index.html
               nohup busybox httpd -f -p ${var.server_port} &
               EOF
+
+  # Required when using a launch configuration with an auto scaling group.
+  # https://www.terraform.io/docs/providers/aws/r/launch_configuration.html
+  lifecycle {
+    create_before_destroy = true
+  }
 }
 
 resource "aws_autoscaling_group" "example" {

code/terraform/03-terraform-state/file-layout-example/stage/services/webserver-cluster/main.tf

@@ -14,6 +14,12 @@ resource "aws_launch_configuration" "example" {
   instance_type   = "t2.micro"
   security_groups = [aws_security_group.instance.id]
   user_data       = data.template_file.user_data.rendered
+
+  # Required when using a launch configuration with an auto scaling group.
+  # https://www.terraform.io/docs/providers/aws/r/launch_configuration.html
+  lifecycle {
+    create_before_destroy = true
+  }
 }
 
 data "template_file" "user_data" {

code/terraform/04-terraform-module/module-example/modules/services/webserver-cluster/main.tf

@@ -7,6 +7,12 @@ resource "aws_launch_configuration" "example" {
   instance_type   = var.instance_type
   security_groups = [aws_security_group.instance.id]
   user_data       = data.template_file.user_data.rendered
+
+  # Required when using a launch configuration with an auto scaling group.
+  # https://www.terraform.io/docs/providers/aws/r/launch_configuration.html
+  lifecycle {
+    create_before_destroy = true
+  }
 }
 
 data "template_file" "user_data" {

code/terraform/05-tips-and-tricks/loops-and-if-statements/modules/services/webserver-cluster/main.tf

@@ -12,6 +12,12 @@ resource "aws_launch_configuration" "example" {
       ? data.template_file.user_data[0].rendered
       : data.template_file.user_data_new[0].rendered
   )
+
+  # Required when using a launch configuration with an auto scaling group.
+  # https://www.terraform.io/docs/providers/aws/r/launch_configuration.html
+  lifecycle {
+    create_before_destroy = true
+  }
 }
 
 data "template_file" "user_data" {

code/terraform/05-tips-and-tricks/zero-downtime-deployment/modules/services/webserver-cluster/main.tf

@@ -8,6 +8,12 @@ resource "aws_launch_configuration" "example" {
   security_groups = [aws_security_group.instance.id]
 
   user_data = data.template_file.user_data.rendered
+
+  # Required when using a launch configuration with an auto scaling group.
+  # https://www.terraform.io/docs/providers/aws/r/launch_configuration.html
+  lifecycle {
+    create_before_destroy = true
+  }
 }
 
 data "template_file" "user_data" {
@@ -22,8 +28,8 @@ data "template_file" "user_data" {
 }
 
 resource "aws_autoscaling_group" "example" {
-  # Explicitly depend on the launch configuration's name so each time it's replaced,
-  # this ASG is also replaced
+  # Explicitly depend on the launch configuration's name so each time it's
+  # replaced, this ASG is also replaced
   name = "${var.cluster_name}-${aws_launch_configuration.example.name}"
 
   launch_configuration = aws_launch_configuration.example.name

code/terraform/06-production-grade-infrastructure/small-modules/modules/cluster/asg-rolling-deploy/main.tf

@@ -7,6 +7,12 @@ resource "aws_launch_configuration" "example" {
   instance_type   = var.instance_type
   security_groups = [aws_security_group.instance.id]
   user_data       = var.user_data
+
+  # Required when using a launch configuration with an auto scaling group.
+  # https://www.terraform.io/docs/providers/aws/r/launch_configuration.html
+  lifecycle {
+    create_before_destroy = true
+  }
 }
 
 resource "aws_autoscaling_group" "example" {

code/terraform/07-testing-terraform-code/examples/hello-world-app/standalone/variables.tf

@@ -6,7 +6,7 @@
 variable "mysql_config" {
   description = "The config for the MySQL DB"
 
-  type        = object({
+  type = object({
     address = string
     port    = number
   })

code/terraform/07-testing-terraform-code/modules/cluster/asg-rolling-deploy/main.tf

@@ -7,6 +7,12 @@ resource "aws_launch_configuration" "example" {
   instance_type   = var.instance_type
   security_groups = [aws_security_group.instance.id]
   user_data       = var.user_data
+
+  # Required when using a launch configuration with an auto scaling group.
+  # https://www.terraform.io/docs/providers/aws/r/launch_configuration.html
+  lifecycle {
+    create_before_destroy = true
+  }
 }
 
 resource "aws_autoscaling_group" "example" {

code/terraform/07-testing-terraform-code/test/hello_world_app_example_test.go

@@ -16,8 +16,8 @@ func TestHelloWorldAppExample(t *testing.T)  {
 	t.Parallel()
 
 	opts := &terraform.Options{
-		// You should update this relative path to point at your alb
-		// example directory!
+		// You should update this relative path to point at your
+		// hello-world-app example directory!
 		TerraformDir: "../examples/hello-world-app/standalone",
 
 		Vars: map[string]interface{}{