adding sample5

@@ -3,5 +3,6 @@
 *.tfstate
 *.tfstate
 *.tfstate.backup
 *.tfstate.backup
 */.*
 */.*
+*/*/.*
 # Module directory
 # Module directory
 .terraform/
 .terraform/

-#  Sample2. Creating ubuntu instance using set of files
+#  Sample3. Deploy a sample application, using RDS
   
   
 1.  Build custom image using packer. Build/redeploy workflow
 1.  Build custom image using packer. Build/redeploy workflow
 2.  Deploy a sample application using *user_data*
 2.  Deploy a sample application using *user_data*

+#  Sample5. Scaling our applications, adding scaling policies
+  
+1.  Add IAM profile for instance
+2.  Creating launch configuration, autoscaling grops
+3.  Building module
+4.  Dealing with LoadBalancers and http
+
+```
+# setup your AMS access parameters in ~/.aws
+
+# Init terraform 
+terraform init
+# Create instance
+terraform apply
+```

+## Get instance AMI
+data "aws_ami" "xpdays-ami" {
+  most_recent = true
+  filter {
+    name   = "name"
+    values = ["xpdays-ami*"]
+  }
+}

+#!/bin/bash
+hostname ${instancehostname} && hostname > /etc/hostname
+echo "127.0.0.1 localhost `hostname`" > /etc/hosts
+cd /home/ubuntu
+git clone https://bitbucket.org/bohdaq/wisehands.me.git
+cd /home/ubuntu/wisehands.me/ && play deps
+mkdir -p /home/ubuntu/wisehands.me/modules/guice-1.2
+cd /home/ubuntu/wisehands.me/modules/guice-1.2
+wget https://www.playframework.com/modules/guice-1.2.zip
+unzip guice-1.2.zip
+sed -i 's/mysql-database-endpoint/${dbendpoint}/g' /home/ubuntu/wisehands.me/conf/application.conf
+cd /home/ubuntu/wisehands.me/ && play run
+

+## Define a policy to RO
+resource "aws_iam_policy" "ec2-ro-policy" {
+    name        = "ec2-ro-policy"
+    path        = "/"
+    description = "Autocreated Policy to read tags from ec2 instance"
+    policy = <<EOF
+{
+    "Version": "2012-10-17",
+    "Statement": [
+        {
+            "Sid": "Stmt1506366968000",
+            "Effect": "Allow",
+            "Action": [
+                "ec2:DescribeInstances",
+                "ec2:DescribeTags"
+            ],
+            "Resource": [
+                "*"
+            ]
+        }
+    ]
+}
+EOF
+}
+
+## STS AssumeRole Data
+data "aws_iam_policy_document" "instance-assume-role-policy" {
+  statement {
+  actions = ["sts:AssumeRole"]
+      principals {
+      type        = "Service"
+      identifiers = ["ec2.amazonaws.com"]
+                  }
+     }
+}
+
+## Add EC2 instance role
+resource "aws_iam_role" "ec2-instance-role" {
+     name               = "ec2-instance-role"
+     path               = "/"
+     assume_role_policy = "${data.aws_iam_policy_document.instance-assume-role-policy.json}"
+      }
+
+## Attach policy to role
+resource "aws_iam_policy_attachment" "ec2-policy-attachemnt" {
+    name       = "ec2-policy-attachemnt"
+    roles      = ["${aws_iam_role.ec2-instance-role.name}"]
+    policy_arn = "${aws_iam_policy.ec2-ro-policy.arn}"
+  }
+
+## Create instance profile and attah the role
+resource "aws_iam_instance_profile" "ec2-instance-profile" {
+          name  = "ec2-instance-profile"
+          role = "${aws_iam_role.ec2-instance-role.name}"
+}
+

+# Template for initial configuration bash script
+data "template_file" "init" {
+  template = "${file("files/init.tpl")}"
+  count = "${length(var.instance_suffix)}"
+  
+  vars {
+    dbendpoint="${aws_db_instance.db-instance.username}:${aws_db_instance.db-instance.password}@${aws_db_instance.db-instance.endpoint}\\/${aws_db_instance.db-instance.name}"
+    instancehostname="xpdays-${var.instance_suffix[count.index]}-${count.index}"
+  }
+}
+
+# Define the instance
+#resource "aws_instance" "xpdays-instance" {
+#    ami = "${data.aws_ami.xpdays-ami.id}"
+#    vpc_security_group_ids = [ "${var.vpc_security_group_ids}" ]
+#    instance_type = "${lookup(var.instance_type, var.environment)}"
+#    user_data = "${data.template_file.init.*.rendered[count.index]}" 
+#
+#    tags {
+#        Name = "xpdays${count.index + 1}"
+#    }
+#
+#    count = "${length(var.instance_suffix)}"
+#}
+
+resource "aws_launch_configuration" "launch-xpdays" {
+#  name          = "${var.environment}-launch-xpdays${count.index + 1}"
+   image_id      = "${data.aws_ami.xpdays-ami.id}"
+   instance_type = "${lookup(var.instance_type, var.environment)}"
+   iam_instance_profile = "${aws_iam_instance_profile.ec2-instance-profile.name}"
+   associate_public_ip_address   = true
+   enable_monitoring = true
+   user_data = "${data.template_file.init.*.rendered[count.index]}"
+  lifecycle {
+    create_before_destroy = true
+  }
+  count = "${length(var.instance_suffix)}"
+}
+

+## Define provider
+provider "aws" {
+	region = "${var.region}"
+}

+resource "aws_db_subnet_group" "default_db_subnet_group" {
+  name       = "main"
+  subnet_ids = ["${var.default_db_subnet_group_subnet_ids[var.region]}"]
+  tags {
+    Name = "Default DB subnet group"
+  }
+}
+
+resource "aws_db_instance" "db-instance" {
+  allocated_storage    = 10
+  storage_type         = "gp2"
+  engine               = "mysql"
+  engine_version       = "5.7.17"
+  instance_class       = "db.t2.micro"
+  name                 = "wisehandsdb"
+  username             = "root"
+  password             = "53N4CsNmQrxh2"
+  db_subnet_group_name = "${aws_db_subnet_group.default_db_subnet_group.id}"
+  final_snapshot_identifier = "snapshot-defaultdbinstance${count.index + 1}"
+  skip_final_snapshot  = true
+  publicly_accessible  = true
+  tags {
+      key   = "Name"
+      value = "default-db-instance${count.index + 1}-${var.environment}"
+    }
+}
+
+output "database_endpoint" {
+  value = "${aws_db_instance.db-instance.username}:${aws_db_instance.db-instance.password}@${aws_db_instance.db-instance.endpoint}/${aws_db_instance.db-instance.name}"
+}

+# String
+region = "eu-central-1"
+
+# List
+vpc_security_group_ids = [ "sg-84e649ed", "sg-90ea45fa" ]
+
+# Map
+instance_type = {
+     production = "t2.micro"
+     development = "m3.medium"
+}
+
+# Map of Lists
+default_db_subnet_group_subnet_ids = {
+     eu-central-1 = [ "subnet-f1e92d8a", "subnet-304b7f7a" ]
+     eu-west-1 = [ "subnet-f1e92d8a", "subnet-304b7f7a"  ]
+}
+
+#
+instance_suffix = ["blue","green"] 

+variable "region" {
+  type        = "string"
+  default     = "eu-central-1"
+  description = "The AWS region"
+}
+
+variable "environment" {
+  description = "The Environment Type"
+  default     = "production"
+}
+
+variable "default_db_subnet_group_subnet_ids" {
+  type    = "map"
+  default = {}
+}
+
+variable "vpc_security_group_ids" {
+  type    = "list"
+}
+
+variable "instance_type" {
+  type    = "map"
+  default = {}
+}
+
+variable "instance_suffix" {
+  type = "list"
+  description = "Add instance suffix"
+}
+