elasticbeanstalk.yaml

---
AWSTemplateFormatVersion: '2010-09-09'
Description: >
  This template a ruby elasticbeanstalk environment that connects to a
  postgresql database by allowing for traffic within the databases\'s vpc

Parameters:
  ApplicationName:
    Description: Name of Elasticbeanstalk application
    Type: String

  KeyName:
    Description: >
      Name of EC2 Key Pair to ssh into instances
      https://us-east-2.console.aws.amazon.com/ec2/v2/home?region=us-east-2#KeyPairs:sort=keyName
    Type: String

  RoutingStackName:
    Description: Stack name of cloudformation stack ran with the routing template
    Type: String
    Default: initial-routing

  VPCStackName:
    Description: Cloudformation stack name that was ran with the vpc template
    Type: String
    Default: staging-vpc

Resources:
  ElasticbeanstalkRole:
    Type: AWS::IAM::Role
    Properties:
      RoleName: rails-api-staging
      AssumeRolePolicyDocument:
        Statement:
        - Effect: Allow
          Principal:
            Service:
            - ec2.amazonaws.com
          Action:
          - sts:AssumeRole
      ManagedPolicyArns:
        - arn:aws:iam::aws:policy/AWSElasticBeanstalkFullAccess

  IAMInstanceProfile:
    Type: AWS::IAM::InstanceProfile
    Properties:
      Path: '/'
      Roles:
        - !Ref ElasticbeanstalkRole
  ElasticIp:
    Type: AWS::EC2::EIP
    Properties:
      Domain: vpc

  NATGateway:
    Type: AWS::EC2::NatGateway
    Properties:
      AllocationId: !GetAtt ElasticIp.AllocationId
      SubnetId:
        Fn::ImportValue: !Sub "${VPCStackName}-PublicSubnet1"

  PrivateRoute:
    Type: AWS::EC2::Route
    Properties:
      RouteTableId:
        Fn::ImportValue: !Sub "${VPCStackName}-PrivateRouteTable"
      DestinationCidrBlock: 0.0.0.0/0
      NatGatewayId: !Ref NATGateway

  EBApplication:
    DependsOn:
      - PrivateRoute
    Type: AWS::ElasticBeanstalk::Application
    Properties:
      ApplicationName: !Ref ApplicationName
      Description: rails-api

  EBEnvironment:
    DependsOn:
      - EBApplication
    Type: AWS::ElasticBeanstalk::Environment
    Properties:
      ApplicationName: !Ref ApplicationName
      SolutionStackName: 64bit Amazon Linux 2016.09 v2.2.0 running Ruby 2.3 (Puma)
      EnvironmentName: staging
      OptionSettings:
        - Namespace: aws:ec2:vpc
          OptionName: VPCId
          Value:
            Fn::ImportValue: !Sub "${VPCStackName}-VpcId"
        - Namespace: aws:ec2:vpc
          OptionName: ELBSubnets
          Value:
            Fn::ImportValue: !Sub "${VPCStackName}-PublicSubnet1"
        - Namespace: aws:elb:loadbalancer
          OptionName: LoadBalancerHTTPSPort
          Value: 443
        - Namespace: aws:autoscaling:asg
          OptionName: MinSize
          Value: 1
        - Namespace: aws:autoscaling:asg
          OptionName: MaxSize
          Value: 2
        - Namespace: aws:ec2:vpc
          OptionName: Subnets
          Value:
            Fn::ImportValue: !Sub "${VPCStackName}-PrivateSubnet1"
        - Namespace: aws:elasticbeanstalk:application
          OptionName: Application Healthcheck Url
          Value: /health
        - Namespace: aws:elb:listener
          OptionName: ListenerProtocol
          Value: HTTPS
        - Namespace: aws:autoscaling:launchconfiguration
          OptionName: IamInstanceProfile
          Value: !GetAtt IAMInstanceProfile.Arn
        - Namespace: aws:elasticbeanstalk:environment
          OptionName: ServiceRole
          Value: rails-api-staging
        - Namespace: aws:autoscaling:launchconfiguration
          OptionName: EC2KeyName
          Value: !Ref KeyName
        - Namespace: aws:elb:listener
          OptionName: SSLCertificateId
          Value:
            Fn::ImportValue: !Sub ${RoutingStackName}-SSLCertificate
      Tier:
        Name: WebServer
        Type: Standard

Outputs:
  EBUrl:
    Description: URL of Elasticbeanstalk
    Value: !GetAtt EBEnvironment.EndpointURL
    Export:
      Name: !Sub ${AWS::StackName}-ElasticbeanstalkUrl