strigo-dev-cfn-stack.sh

Description: >
    This stack provisions the required resources for a per-branch strigo app.
    The main idea here is that it creates host-header based listener rules which direct specific
    hosts (e.g. test.app-dev.strigo.io) to a specific ALB Target Group behind which is the
    instance containing the branch's code.
    See http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-elasticloadbalancingv2-listenerrule.html

Parameters:
  Branch:
    Description: The name of the branch to build for
    Type: String
    ConstraintDescription: 'Must not be longer than 255'
    MaxLength: 255

  AMI:
    Description: AMI ID to use for the Instance
    Type: String
    Default: ami-1f83aa79

  HttpListenerArn:
    Description: The HTTP Listener arn in which the host-based rule should be set.
    Type: String
    Default: arn:aws:elasticloadbalancing:...

  HttpsListenerArn:
    Description: The HTTPS Listener arn in which the host-based rule should be set.
    Type: String
    Default: arn:aws:elasticloadbalancing...

  LoadBalancerPriority:
    Description: 'The priority for the rule. Elastic Load Balancing evaluates rules in priority order, from the lowest value to the highest value. If a request satisfies a rule, Elastic Load Balancing ignores all subsequent rules. A target group can have only one rule with a given priority.'
    Type: Number
    Default: 1
    ConstraintDescription: 'Must be in the range [1-99999]'
    MinValue: 1
    MaxValue: 99999


Resources:
  LoadBalancerTargetGroup:
    Type: 'AWS::ElasticLoadBalancingV2::TargetGroup'
    Properties:
      Port: 2545
      Protocol: HTTP
      VpcId: vpc-xxxxxxxx
      Targets:
        - Id: !Ref Instance

  LoadBalancerHttpListenerRule:
    Type: 'AWS::ElasticLoadBalancingV2::ListenerRule'
    Properties:
      Actions:
      - Type: forward
        TargetGroupArn: !Ref LoadBalancerTargetGroup
      Conditions:
      - Field: host-header
        Values:
        - !Join [ '.', [ !Ref Branch, 'app-dev.strigo.io' ] ]
      ListenerArn: !Ref HttpListenerArn
      Priority: !Ref LoadBalancerPriority

  LoadBalancerHttpsListenerRule:
    Type: 'AWS::ElasticLoadBalancingV2::ListenerRule'
    Properties:
      Actions:
      - Type: forward
        TargetGroupArn: !Ref LoadBalancerTargetGroup
      Conditions:
      - Field: host-header
        Values:
        - !Join [ '.', [ !Ref Branch, 'app-dev.strigo.io' ] ]
      ListenerArn: !Ref HttpsListenerArn
      Priority: !Ref LoadBalancerPriority

  Instance:
    Type: "AWS::EC2::Instance"
    Properties:
      AvailabilityZone: eu-west-1a
      ImageId: !Ref AMI
      InstanceType: t2.medium
      KeyName: strigo
      SecurityGroupIds:
        - sg-xxxxxxxx
        - !Ref InstanceSecurityGroup
      SubnetId: subnet-xxxxxxxx
      Tags:
        - Key: Name
          Value: !Join [ '.', [ 'strigo-app-dev', !Ref Branch ] ]
        - Key: Type
          Value: strigo-app-dev
        - Key: Index
          Value: 0

  InstanceSecurityGroup:
    Type: "AWS::EC2::SecurityGroup"
    Properties:
      VpcId: vpc-xxxxxxxx
      GroupDescription: !Join [ ' ', [ 'Development instance security group for', !Ref Branch ] ]
      SecurityGroupIngress:
        - IpProtocol: tcp
          FromPort: 2545
          ToPort: 2545
          SourceSecurityGroupId: sg-081c3871