AWSTemplateFormatVersion: '2010-09-09'
Description: catsndogs.lol workshop lab1. Deploys an Auto Scaling group to join to the cluster.
Parameters:
  LabSetupStackName:
    Type: String
    Description: "Name of the stack created at the very start of the workshop"
    Default: catsndogssetup
  ECSCluster:
    Type: String
    Description: "Name of the ECS cluster you created earlier"
    Default: catsndogsECScluster
Mappings:
  AWSRegionToAMI:
    us-east-1:
      AMIID: ami-9eb4b1e5
    us-east-2:
      AMIID: ami-1c002379
    us-west-1:
      AMIID: ami-4a2c192a
    us-west-2:
      AMIID: ami-1d668865
    eu-central-1:
      AMIID: ami-0460cb6b
    eu-west-1:
      AMIID: ami-8fcc32f6
    eu-west-2:
      AMIID: ami-cb1101af
    ap-northeast-1:
      AMIID: ami-b743bed1
    ap-southeast-2:
      AMIID: ami-c1a6bda2
    ap-southeast-1:
      AMIID: ami-9d1f7efe
    ca-central-1:
      AMIID: ami-b677c9d2
Resources:
  ASGSNSTopic:
    Type: "AWS::SNS::Topic"
  ECSAutoScalingGroup:
    Type: AWS::AutoScaling::AutoScalingGroup
    Properties:
      VPCZoneIdentifier:
        - Fn::ImportValue:
            !Sub "${LabSetupStackName}-PriSubnet1"
        - Fn::ImportValue:
            !Sub "${LabSetupStackName}-PriSubnet2"
      LaunchConfigurationName: !Ref 'ECSOnDemandLaunchConfig'
      NotificationConfigurations:
      - TopicARN: !Ref ASGSNSTopic
        NotificationTypes:
        - autoscaling:EC2_INSTANCE_LAUNCH
        - autoscaling:EC2_INSTANCE_LAUNCH_ERROR
        - autoscaling:EC2_INSTANCE_TERMINATE
        - autoscaling:EC2_INSTANCE_TERMINATE_ERROR
      MinSize: '1'
      MaxSize: '1'
      Tags:
      - Key: Name
        Value: ECSContainerInstance
        PropagateAtLaunch: 'true'
      DesiredCapacity: '1'

  ECSOnDemandLaunchConfig:
    Type: AWS::AutoScaling::LaunchConfiguration
    Metadata:
      AWS::CloudFormation::Init:
        config:
          commands:
            050_add_instance_to_cluster:
              command: !Join ['', ['#!/bin/bash

                    ', echo ECS_CLUSTER=, !Ref 'ECSCluster', ' >> /etc/ecs/ecs.config']]
    Properties:
      ImageId: !FindInMap [AWSRegionToAMI, !Ref 'AWS::Region', AMIID]
      InstanceType: t2.medium
      UserData: !Base64
        Fn::Join:
        - ''
        - ['#!/bin/bash -xe

            ', 'yum install -y aws-cfn-bootstrap

            ', 'yum update -y

            ', '/opt/aws/bin/cfn-init -v ', '         --stack ', !Ref 'AWS::StackName',
          '         --resource ECSOnDemandLaunchConfig ', '         --region ', !Ref 'AWS::Region']
      SecurityGroups:
        - Fn::ImportValue:
            !Sub "${LabSetupStackName}-InstanceSG"
      IamInstanceProfile:
        Fn::ImportValue:
          !Sub "${LabSetupStackName}-EC2InstanceProfile"