vpc-elasticache.cfn.yml

---
AWSTemplateFormatVersion: 2010-09-09


Description: SASKV5 VPC + ElastiCache


Parameters:

  TemplateBucket:
    Type: String
    Default: awslabs-startup-kit-templates-deploy-v5
    Description: The template bucket for the CloudFormation templates

  # vpc.cfn.yml parameters
  AvailabilityZone1:
    Description: The first availability zone in the region
    Type: AWS::EC2::AvailabilityZone::Name
    ConstraintDescription: Must be a valid availability zone

  AvailabilityZone2:
    Description: The second availability zone in the region
    Type: AWS::EC2::AvailabilityZone::Name
    ConstraintDescription: Must be a valid availability zone

  SSHFrom:
    Description: Limit SSH access to bastion hosts to a CIDR IP block
    Type: String
    MinLength: 9
    MaxLength: 18
    Default: 0.0.0.0/0

  ELBIngressPort:
    Description: The ELB ingress port used by security groups
    Type: Number
    MinValue: 0
    MaxValue: 65535
    ConstraintDescription: TCP ports must be between 0 - 65535
    Default: 80

  AppIngressPort:
    Description: The application ingress port used by security groups
    Type: Number
    MinValue: 0
    MaxValue: 65535
    ConstraintDescription: TCP ports must be between 0 - 65535
    Default: 80

  # elasticache.cfn.yml parameters
  ClusterName:
    Description: Custom name of the cluster. Auto generated if you don't supply your own.
    Type: String

  CacheNodeType:
    Description: Cache node instance class, e.g. cache.t2.micro(free tier). See https://docs.aws.amazon.com/AmazonElastiCache/latest/UserGuide/CacheNodes.SelectSize.html
    Type: String
    Default: cache.t2.micro
    ConstraintDescription: Node instance class not supported
    AllowedValues:
      - cache.t2.micro
      - cache.t2.small
      - cache.t2.medium
      - cache.m4.large
      - cache.m4.xlarge
      - cache.m4.2xlarge
      - cache.m4.4xlarge
      - cache.m4.10xlarge
      - cache.r4.large
      - cache.r4.xlarge
      - cache.r4.2xlarge
      - cache.r4.4xlarge
      - cache.r4.8xlarge
      - cache.r4.16xlarge

  CacheEngine:
    Description: The underlying cache engine, either Redis or Memcached
    Type: String
    Default: redis
    ConstraintDescription: Node instance class not supported
    AllowedValues:
      - redis
      - memcached

  CacheNodeCount:
    Description: Number of nodes in the cluster. Only used with memcached engine, for redis this value will be set to 1.
    Type: Number
    MinValue: 1
    MaxValue: 15
    ConstraintDescription: Node count must be between 1 and 15
    Default: 1

  AutoMinorVersionUpgrade:
    Description: Whether or not minor version upgrades to the cache engine should be applied automatically during the maintenance window.
    Type: String
    Default: true
    AllowedValues:
      - true
      - false

  EnvironmentName:
    Type: String
    Description: Environment name - dev or prod
    Default: dev
    AllowedValues:
      - dev
      - prod
    ConstraintDescription: Specify either dev or prod

Metadata:
  AWS::CloudFormation::Interface:
    ParameterGroups:
      - Label:
          default: Environment
        Parameters:
          - EnvironmentName
      - Label:
          default: Region Availability Zones
        Parameters:
          - AvailabilityZone1
          - AvailabilityZone2
      - Label:
          default: Ingress Ports
        Parameters:
          - ELBIngressPort
          - AppIngressPort
    ParameterLabels:
      AvailabilityZone1:
        default: Availability Zone 1
      AvailabilityZone2:
        default: Availability Zone 2
      ELBIngressPort:
        default: Load Balancer Port
      AppIngressPort:
        default: Application Port
      SSHFrom:
        default: Bastion SSH Whitelist
      TemplateBucket:
        default: CloudFormation Bucket
      EnvironmentName:
        default: Environment
      SSHFrom:
        default: SSH Whitelist

Conditions:

   IsProd: !Equals [ !Ref EnvironmentName, prod ]

Resources:

  VpcStack:
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: !Sub https://s3.amazonaws.com/${TemplateBucket}/templates/vpc.cfn.yml
      Parameters:
        AvailabilityZone1: !Ref AvailabilityZone1
        AvailabilityZone2: !Ref AvailabilityZone2
        SSHFrom: !Ref SSHFrom
        ELBIngressPort: !Ref ELBIngressPort
        AppIngressPort: !Ref AppIngressPort
        SingleNatGateway: !If [ IsProd, false, true ]

  ElastiCacheStack:
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: !Sub https://s3.amazonaws.com/${TemplateBucket}/templates/elasticache.cfn.yml
      Parameters:
        NetworkStackName: !GetAtt VpcStack.Outputs.Name
        ClusterName: !Ref ClusterName
    DependsOn: VpcStack

Outputs:

  VpcStackName:
    Value: !GetAtt VpcStack.Outputs.Name
    Export:
      Name: !Sub ${AWS::StackName}-VpcStackName

  ElastiCacheStackName:
    Value: !GetAtt ElastiCacheStack.Outputs.ElastiCacheStackName
    Export:
      Name: !Sub ${AWS::StackName}-ElastiCacheStackName