ebs.yaml

---
AWSTemplateFormatVersion: '2010-09-09'
Description: 'AWS in Action: chapter 9 (EBS)'
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'
  AttachVolume:
    Description: 'Should the volume be attached?'
    Type: String
    Default: 'yes'
    AllowedValues:
    - 'yes'
    - 'no'
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'
Conditions:
  Attached: !Equals [!Ref AttachVolume, 'yes']
Resources:
  SecurityGroup:
    Type: 'AWS::EC2::SecurityGroup'
    Properties:
      GroupDescription: 'Allow incoming SSH from anywhere'
      VpcId: !Ref VPC
      SecurityGroupIngress:
      - CidrIp: '0.0.0.0/0'
        FromPort: 22
        ToPort: 22
        IpProtocol: tcp
      Tags:
      - Key: Name
        Value: 'AWS in Action: chapter 9 (EBS)'
  IamRole:
    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:
          - Effect: Allow
            Action:
            - 'ec2:DescribeVolumes'
            - 'ec2:CreateSnapshot'
            - 'ec2:DescribeSnapshots'
            - 'ec2:DeleteSnapshot'
            Resource: '*'
  IamInstanceProfile:
    Type: AWS::IAM::InstanceProfile
    Properties:
      Roles:
      - !Ref IamRole
  EC2Instance:
    Type: 'AWS::EC2::Instance'
    Properties:
      IamInstanceProfile: !Ref IamInstanceProfile
      ImageId: !FindInMap [RegionMap, !Ref 'AWS::Region', AMI]
      InstanceType: 't2.micro'
      KeyName: !Ref KeyName
      SecurityGroupIds:
      - !Ref SecurityGroup
      SubnetId: !Ref Subnet
      Tags:
      - Key: Name
        Value: 'AWS in Action: chapter 9 (EBS)'
  Volume:
    Type: 'AWS::EC2::Volume'
    Properties:
      AvailabilityZone: !Sub ${EC2Instance.AvailabilityZone}
      Size: 5
      VolumeType: gp2
      Tags:
      - Key: Name
        Value: 'AWS in Action: chapter 9 (EBS)'
  VolumeAttachment:
    Type: 'AWS::EC2::VolumeAttachment'
    Condition: Attached
    Properties:
      Device: '/dev/xvdf'
      InstanceId: !Ref EC2Instance
      VolumeId: !Ref Volume
Outputs:
  PublicName:
    Value: !Sub ${EC2Instance.PublicDnsName}
    Description: 'Public name (connect via SSH as user ec2-user)'
  VolumeId:
    Value: !Ref Volume
    Description: 'ID of the EBS volume'