canary-setup.yaml

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: >
  A CloudFormation template to create an ECS canary blue-green deployment environment. 
  This template creates a VPC, an ECS cluster, with a task and service registered to a 'blue' loadbalancer.
  It also registers a Route53 domain name for a service.  This domain will point at the blue loadbalancer to start.
  
Parameters:
  RecordSetName:
    Type: String
    Description: A record to use to direct traffic to the load balancer. For example 'myservice'.
  HostedZoneName:
    Type: String
    Description: Name of the hosted zone in Route53. For example 'example.com.'. This MUST end in a '.'
  TemplateBucket:
    Type: String
    Description: S3 Bucket used for nested templates
      
Metadata:
  AWS::CloudFormation::Interface:
    ParameterGroups:
      - Label:
          default: ECS canary blue green deployment, using DNS mechanism
        Parameters:
          - TemplateBucket
          - HostedZoneName
          - RecordSetName
    ParameterLabels:
      TemplateBucket:
        default: "An S3 bucket to hold your CloudFormation templates and lambda functions"
      HostedZoneName:
        default: "What is the hosted zone DNS name?"
      RecordSetName:
        default: "What is the service name?"
        
Resources:
  Cluster:
    DependsOn: VPC
    DependsOn: LoadBalancer
    DependsOn: NewLB
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: !Sub https://s3.amazonaws.com/${TemplateBucket}/templates/ecs-cluster.yaml
      Parameters:
        SourceSecurityGroup1: !GetAtt LoadBalancer.Outputs.SecurityGroup
        SourceSecurityGroup2: !GetAtt NewLB.Outputs.SecurityGroup
        Subnets: !GetAtt VPC.Outputs.Subnets
        VpcId: !GetAtt VPC.Outputs.VpcId

  LoadBalancer:
    DependsOn: VPC
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: !Sub https://s3.amazonaws.com/${TemplateBucket}/templates/load-balancer.yaml
      Parameters:
        Subnets: !GetAtt VPC.Outputs.Subnets
        VpcId: !GetAtt VPC.Outputs.VpcId

  NewLB:
    Type: AWS::CloudFormation::Stack
    DependsOn: VPC
    Properties:
      TemplateURL: !Sub https://s3.amazonaws.com/${TemplateBucket}/templates/load-balancer.yaml
      Parameters:
        Subnets: !GetAtt VPC.Outputs.Subnets
        VpcId: !GetAtt VPC.Outputs.VpcId
        
  VPC:
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: !Sub https://s3.amazonaws.com/${TemplateBucket}/templates/vpc.yaml
      Parameters:
        Name: !Ref AWS::StackName
        VpcCIDR: 192.168.0.0/16
        Subnet1CIDR: 192.168.10.0/24
        Subnet2CIDR: 192.168.20.0/24

  Service:
    DependsOn: Cluster
    DependsOn: LoadBalancer
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: !Sub https://s3.amazonaws.com/${TemplateBucket}/templates/blueService.yaml
      Parameters:
        Cluster: !GetAtt Cluster.Outputs.ClusterName
        TargetGroup: !GetAtt LoadBalancer.Outputs.TargetGroup

  Route53:
    Type: AWS::CloudFormation::Stack
    DependsOn: LoadBalancer
    DependsOn: NewLB
    Properties:
      TemplateURL: !Sub https://s3.amazonaws.com/${TemplateBucket}/templates/route53.yaml
      Parameters:
        ZoneName: !Ref HostedZoneName
        RecordName: !Ref RecordSetName
        BlueName: !GetAtt LoadBalancer.Outputs.DNSName
        GreenName: !GetAtt NewLB.Outputs.DNSName
        CanonicalZone: !GetAtt LoadBalancer.Outputs.CanonicalZone
    
  myDynamoDBTable:
    Type: AWS::CloudFormation::Stack
    DependsOn: LoadBalancer
    DependsOn: NewLB
    DependsOn: Route53
    Properties:
      TemplateURL: !Sub https://s3.amazonaws.com/${TemplateBucket}/templates/dynamo.yaml
      Parameters:
        DNSName: !GetAtt Route53.Outputs.DNS
        OldLB: !GetAtt LoadBalancer.Outputs.DNSName
        NewLB: !GetAtt NewLB.Outputs.DNSName
        HostedZoneID: !GetAtt Route53.Outputs.HostedZoneID
        LBZoneID: !GetAtt LoadBalancer.Outputs.CanonicalZone
        TargetGroup: !GetAtt NewLB.Outputs.TargetGroup
        
Outputs:
  DNS:
    Description: The DNS name of the Route53 domain handling the blue-green service
    Value: !GetAtt Route53.Outputs.DNS
  BlueLoadBalancerUrl:
    Description: The URL of the LB handling the blue service
    Value: !GetAtt LoadBalancer.Outputs.ServiceUrl
  GreenLoadBalancerUrl:
    Description: The URL of the LB handling the green service
    Value: !GetAtt NewLB.Outputs.ServiceUrl
  ClusterName:
    Description: The ECS cluster name
    Value: !GetAtt Cluster.Outputs.ClusterName
    Export: 
      Name: !Sub "${AWS::StackName}-Cluster"
  TargetGroup:
    Description: The Load Balancer's Target Group. This allows the new ECS service to register with the proper LB
    Value: !GetAtt NewLB.Outputs.TargetGroup
    Export: 
      Name: !Sub "${AWS::StackName}-TG"
  BucketName:
    Description: The S3 bucket where all the templates and scripts are being stored
    Value: !Ref TemplateBucket
    Export:
      Name: !Sub "${AWS::StackName}-Bucket"
  TableName:
    Description: Table name of the newly created DynamoDB table
    Value: !Ref 'myDynamoDBTable'
    Export:
      Name: !Sub "${AWS::StackName}-Table"