# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
# SPDX-License-Identifier: MIT-0

# This template demonstrates how to configure Amazon Route53 Application Recovery Controller Routing Controls
#
# ***************************************************
# RUNNING THIS TEMPLATE COSTS $60/day ($2.5/hour) 
# BE SURE TO DELETE THIS STACK WHEN NO LONGER NEEDED
# ***************************************************
#
# For a full description of how it works, please read
# https://aws.amazon.com/fr/blogs/aws/amazon-route-53-application-recovery-controller/
#

AWSTemplateFormatVersion: '2010-09-09'
Description: 'Amazon Route53 Application Recovery Controller cluster and routing control for the DynamoDB five-9s app'
Parameters:
  Region1:
    Default: us-east-1
    Description: The region for the first cell
    Type: String 

  Region2:
    Default: us-west-2
    Description: The region for the second cell
    Type: String 

  ProjectId:
    AllowedPattern: '[a-zA-Z][a-zA-Z0-9]*'
    ConstraintDescription: Must begin with a letter and contain only alphanumeric
      characters.
    Default: Dynamo59
    Description: The name of the project
    MaxLength: '64'
    MinLength: '1'
    Type: String

Resources:

#
# The Application Recovery Controller cluster
#

  Cluster:
    Type: AWS::Route53RecoveryControl::Cluster
    Properties:
      Name: !Sub ${ProjectId}-Cluster

#
# The Application Recovery Controller control panel
#

  ControlPanel:
    Type: AWS::Route53RecoveryControl::ControlPanel
    Properties:
      Name: !Sub ${ProjectId}-ControlPanel
      ClusterArn: !Ref Cluster

#
# The Application Recovery Controller routing controls
#

  RoutingControlCell1:
    Type: AWS::Route53RecoveryControl::RoutingControl
    Properties:
      Name: !Sub ${ProjectId}-Cell1-${Region1}
      ClusterArn: !Ref Cluster
      ControlPanelArn: !Ref ControlPanel
 
  RoutingControlCell2:
    Type: AWS::Route53RecoveryControl::RoutingControl
    Properties:
      Name: !Sub ${ProjectId}-Cell2-${Region2}
      ClusterArn: !Ref Cluster
      ControlPanelArn: !Ref ControlPanel

#
# The Application Recovery Controller safety rules
#

  SafetyRuleMinCellsActive:
    Type: AWS::Route53RecoveryControl::SafetyRule
    Properties:
      Name: !Sub ${ProjectId}-MinCellsActive
      ControlPanelArn: !Ref ControlPanel
      AssertionRule:
        WaitPeriodMs: 5000
        AssertedControls:
          - !Ref RoutingControlCell1
          - !Ref RoutingControlCell2
      RuleConfig:
        Type: ATLEAST
        Threshold: 1
        Inverted: false

#
# The Application Recovery Controller healthchecks
#

  HealthCheckCell1:
    Type: AWS::Route53::HealthCheck
    Properties:
      HealthCheckConfig:
        Type: "RECOVERY_CONTROL"
        RoutingControlArn: !Ref RoutingControlCell1

  HealthCheckCell2:
    Type: AWS::Route53::HealthCheck
    Properties:
      HealthCheckConfig:
        Type: "RECOVERY_CONTROL"
        RoutingControlArn: !Ref RoutingControlCell2

Outputs:
  ClusterArn:
    Value: !Ref Cluster

  ControlPanelArn:
    Value: !GetAtt ControlPanel.ControlPanelArn
  
  HealthCheckIdEast:
    Value: !Ref HealthCheckCell1

  HealthCheckIdWest:
    Value: !Ref HealthCheckCell2