Adding README.md

+## XPDays 2017 Building with Terraform code samples
+
+The presentation could be found here:
+https://docs.google.com/presentation/d/1ZYWxuzoPwWyzmrM-GJvCnP8DurLZqGRLg-xYMHO4JIw/edit?usp=sharing
+
+### Sample1. Creating Ubuntu instance using one file
+
+1.  Init the Terrarorm
+2.  Starting our first instance
+3.  Terraform produce the state file *terraform.tfstate*
+
+### Sample2. Creating ubuntu instance using set of files
+  
+1.  AMI selection moved to separate ami.tf
+2.  Instance settings parametized by terraform variables
+3.  Created variable files: *terraform.tfvars, variables.tf*
+4.  Example for list element selection in *vpc_security_group_ids*
+5.  Example for map element lookup in *instance_type*
+6.  Add metadata variable count
+
+### Sample3. Deploy a sample application, using RDS
+  
+1.  Build custom image using packer. Build/redeploy workflow
+2.  Deploy a sample application using *user_data*
+3.  Create RDS MySQL database, pass db endpoint to application
+4.  Adding outputs
+
+### Sample4. Using funtions and count hints
+  
+1.  Moving deployment script into temlplate provider
+2.  Using *length()* function to get size and create multiple resources
+
+### 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
+
+### AppendixA.  Upgrading applications environment
+1.  Blue/Green deployment
+2.  Cannary upgrade

@@ -4,7 +4,7 @@
 2.  Creating launch configuration, autoscaling grops
 2.  Creating launch configuration, autoscaling grops
 3.  Building module
 3.  Building module
 4.  Dealing with LoadBalancers and http
 4.  Dealing with LoadBalancers and http
-
+5.  Upgrading applications environment 
 ```
 ```
 # setup your AMS access parameters in ~/.aws
 # setup your AMS access parameters in ~/.aws
 
 

@@ -9,20 +9,6 @@ data "template_file" "init" {
   }
   }
 }
 }
 
 
-# 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" {
 resource "aws_launch_configuration" "launch-xpdays" {
 #  name          = "${var.environment}-launch-xpdays${count.index + 1}"
 #  name          = "${var.environment}-launch-xpdays${count.index + 1}"
    image_id      = "${data.aws_ami.xpdays-ami.id}"
    image_id      = "${data.aws_ami.xpdays-ami.id}"
@@ -37,3 +23,28 @@ resource "aws_launch_configuration" "launch-xpdays" {
   count = "${length(var.instance_suffix)}"
   count = "${length(var.instance_suffix)}"
 }
 }
 
 
+## Add Autoscaling group
+resource "aws_autoscaling_group" "asg-xpdays" {
+    lifecycle { create_before_destroy = true }
+   # depends_on = ["aws_launch_configuration.launch-xpdays"]
+    desired_capacity          = "${element(var.instance_count_xpdays_desired[var.environment],count.index)}"
+    max_size                  = "${lookup(var.instance_count_xpdays_max, var.environment)}"
+    min_size                  = "${lookup(var.instance_count_xpdays_min, var.environment)}"
+    health_check_grace_period = 300
+    health_check_type         = "EC2"
+    launch_configuration      = "${element(aws_launch_configuration.launch-xpdays.*.name, count.index)}"
+    name                      = "asg-xpdays${count.index + 1}-${var.environment}"
+    availability_zones        = ["${lookup(var.default_subnet_availability_zone, var.environment)}"]
+    vpc_zone_identifier       =  ["${list(aws_subnet.default_subnet.id)}"]
+#    load_balancers            =  ["${module.m-elb-xpdays.elb_id}"]
+    #wait_for_elb_capacity     = "${element(var.instance_count_xpdays_desired[var.environment],count.index)}"
+#    enabled_metrics = "${var.asg_enabled_metrics}"
+
+    tag {
+        key   = "Name"
+        value = "xpdays-${var.instance_suffix[count.index]}-${count.index}"
+        propagate_at_launch = true
+    }
+ count     = "${length(var.instance_suffix)}"
+}
+

@@ -17,4 +17,19 @@ default_db_subnet_group_subnet_ids = {
 }
 }
 
 
 #
 #
-instance_suffix = ["blue","green"] 
+instance_suffix = ["blue","green"]
+
+
+instance_count_xpdays_desired = {
+	        production = 1 
+	        development = 1
+}
+instance_count_xpdays_min = {
+	        production = 1
+	        development = 1
+}
+instance_count_xpdays_max = {
+	        production = 3
+	        development = 1
+}
+