ec2-iamrole.yaml

---
AWSTemplateFormatVersion: '2010-09-09'
Description: 'AWS in Action: chapter 6 (IAM role)'
Parameters:
  KeyName:
    Description: 'Key Pair name'
    Type: 'AWS::EC2::KeyPair::KeyName'
    Default: mykey
  VPC:
    Description: 'Just select the one and only default VPC'
    Type: 'AWS::EC2::VPC::Id'
  Subnet:
    Description: 'Just select one of the available subnets'
    Type: 'AWS::EC2::Subnet::Id'
  Lifetime:
    Description: 'Lifetime in minutes (2-59)'
    Type: Number
    Default: '2'
    MinValue: '2'
    MaxValue: '59'
Mappings:
  RegionMap:
    'ap-south-1':
      AMI: 'ami-2ed19c41'
    'eu-west-3':
      AMI: 'ami-c8a017b5'
    'eu-west-2':
      AMI: 'ami-e3051987'
    'eu-west-1':
      AMI: 'ami-760aaa0f'
    'ap-northeast-2':
      AMI: 'ami-fc862292'
    'ap-northeast-1':
      AMI: 'ami-2803ac4e'
    'sa-east-1':
      AMI: 'ami-1678037a'
    'ca-central-1':
      AMI: 'ami-ef3b838b'
    'ap-southeast-1':
      AMI: 'ami-dd7935be'
    'ap-southeast-2':
      AMI: 'ami-1a668878'
    'eu-central-1':
      AMI: 'ami-e28d098d'
    'us-east-1':
      AMI: 'ami-6057e21a'
    'us-east-2':
      AMI: 'ami-aa1b34cf'
    'us-west-1':
      AMI: 'ami-1a033c7a'
    'us-west-2':
      AMI: 'ami-32d8124a'
Resources:
  SecurityGroup:
    Type: 'AWS::EC2::SecurityGroup'
    Properties:
      GroupDescription: 'My security group'
      VpcId: !Ref VPC
      SecurityGroupIngress:
      - CidrIp: '0.0.0.0/0'
        FromPort: 22
        IpProtocol: tcp
        ToPort: 22
      Tags:
      - Key: Name
        Value: 'AWS in Action: chapter 6 (IAM role)'
  InstanceProfile:
    Type: 'AWS::IAM::InstanceProfile'
    Properties:
      Roles:
      - !Ref Role
  Role:
    Type: 'AWS::IAM::Role'
    Properties:
      AssumeRolePolicyDocument:
        Version: '2012-10-17'
        Statement:
        - Effect: Allow
          Principal:
            Service:
            - 'ec2.amazonaws.com'
          Action:
          - 'sts:AssumeRole'
      Policies:
      - PolicyName: ec2
        PolicyDocument:
          Version: '2012-10-17'
          Statement:
          - Sid: Stmt1425388787000
            Effect: Allow
            Action:
            - 'ec2:StopInstances'
            Resource:
            - '*'
            Condition:
              StringEquals:
                'ec2:ResourceTag/aws:cloudformation:stack-id': !Ref 'AWS::StackId'
  Instance:
    Type: 'AWS::EC2::Instance'
    Properties:
      IamInstanceProfile: !Ref InstanceProfile
      ImageId: !FindInMap [RegionMap, !Ref 'AWS::Region', AMI]
      InstanceType: 't2.micro'
      KeyName: !Ref KeyName
      SecurityGroupIds:
      - !Ref SecurityGroup
      SubnetId: !Ref Subnet
      UserData:
        'Fn::Base64': !Sub |
          #!/bin/bash -x
          INSTANCEID="$(curl -s http://169.254.169.254/latest/meta-data/instance-id)"
          echo "aws ec2 stop-instances --instance-ids $INSTANCEID --region ${AWS::Region}" | at now + ${Lifetime} minutes
      Tags:
      - Key: Name
        Value: 'AWS in Action: chapter 6 (IAM role)'
Outputs:
  InstancePublicName:
    Value: !Sub ${Instance.PublicDnsName}
    Description: Public name (connect via SSH as user ec2-user)