AWSTemplateFormatVersion: 2010-09-09

Parameters:
  EC2InstanceType:
    Type: String
    Default: t2.xlarge
  EC2AMI:
    Type: String
    Default: 'ami-09e67e426f25ce0d7'
  KeyName:
    Description: Name of an existing EC2 KeyPair to enable SSH access to the instance
    Type: 'AWS::EC2::KeyPair::KeyName'
    Default: 'joystream-key'
    ConstraintDescription: must be the name of an existing EC2 KeyPair.

Resources:
  SecurityGroup:
    Type: AWS::EC2::SecurityGroup
    Properties:
      GroupDescription:
        !Sub 'Internal Security group for validator nodes ${AWS::StackName}'
      SecurityGroupIngress:
        - IpProtocol: tcp
          FromPort: 22
          ToPort: 22
          CidrIp: 0.0.0.0/0
      Tags:
        - Key: Name
          Value: !Sub '${AWS::StackName}_validator'

  InstanceLaunchTemplate:
    Type: AWS::EC2::LaunchTemplate
    Metadata:
      AWS::CloudFormation::Init:
        config:
          packages:
            apt:
              wget: []
              unzip: []
    Properties:
      LaunchTemplateName: !Sub 'LaunchTemplate_${AWS::StackName}'
      LaunchTemplateData:
        ImageId: !Ref EC2AMI
        InstanceType: !Ref EC2InstanceType
        KeyName: !Ref KeyName
        SecurityGroupIds:
          - !GetAtt SecurityGroup.GroupId
        BlockDeviceMappings:
          - DeviceName: /dev/sda1
            Ebs:
              VolumeSize: '120'
        UserData:
          Fn::Base64: !Sub |
            #!/bin/bash -xe

            # send script output to /tmp so we can debug boot failures
            exec > /tmp/userdata.log 2>&1

            # Update all packages
            apt-get update -y

            # Prevent interactive prompts that would interrupt the installation
            export DEBIAN_FRONTEND=noninteractive

            # Install the updates
            apt-get upgrade -y

            # Get latest cfn scripts and install them;
            apt-get install -y python3-setuptools
            mkdir -p /opt/aws/bin
            wget https://s3.amazonaws.com/cloudformation-examples/aws-cfn-bootstrap-py3-latest.tar.gz
            python3 -m easy_install --script-dir /opt/aws/bin aws-cfn-bootstrap-py3-latest.tar.gz

            /opt/aws/bin/cfn-signal -e $? -r "Instance Created" '${WaitHandle}'

  Instance:
    Type: AWS::EC2::Instance
    Properties:
      LaunchTemplate:
        LaunchTemplateId: !Ref InstanceLaunchTemplate
        Version: !GetAtt InstanceLaunchTemplate.LatestVersionNumber
      Tags:
        - Key: Name
          Value: !Sub '${AWS::StackName}_1'

  WaitHandle:
    Type: AWS::CloudFormation::WaitConditionHandle

  WaitCondition:
    Type: AWS::CloudFormation::WaitCondition
    Properties:
      Handle: !Ref 'WaitHandle'
      Timeout: '600'
      Count: 1

Outputs:
  PublicIp:
    Description: The DNS name for the created instance
    Value:  !Sub "${Instance.PublicIp}"
    Export:
      Name: !Sub "${AWS::StackName}PublicIp"

  InstanceId:
    Description: The Instance ID
    Value:  !Ref Instance