AWS Cloudformation template to create customizable ElastiCache Redis instance

aws_elasticache_redis.yml

AWSTemplateFormatVersion: '2010-09-09'
Description: Creates customizable ElastiCache Redis instance.

Parameters:
  RedisCacheNodeType:
    Type: String
    Default: cache.t3.micro
    Description: The compute and memory capacity of the nodes in the node group.

  SecurityGroup:
    Type: AWS::EC2::SecurityGroup::Id
    Description: The ID of the VPC security group.

  SubnetId1:
    Type: AWS::EC2::Subnet::Id
    Description: The ID of the first subnet.

  SubnetId2:
    Type: AWS::EC2::Subnet::Id
    Description: The ID of the second subnet.

  ResourceNamePrefix:
    Type: String
    Description: The environment name, used to determine the secret name.

Resources:
  ElastiCacheCluster:
    Type: AWS::ElastiCache::CacheCluster
    Properties:
      CacheNodeType: !Ref RedisCacheNodeType
      Engine: redis
      NumCacheNodes: 1
      CacheSubnetGroupName: !Ref CacheSubnetGroup
      VpcSecurityGroupIds:
        - !Ref SecurityGroup

  CacheSubnetGroup:
    Type: AWS::ElastiCache::SubnetGroup
    Properties:
      Description: cache subnet group
      SubnetIds:
        - !Ref SubnetId1
        - !Ref SubnetId2

  RedisHostSecret:
    Type: AWS::SecretsManager::Secret
    Properties:
      Name: !Sub "${ResourceNamePrefix}-redis-host"
      Description: Redis host for the environment
      SecretString: !Sub '{"REDIS_HOST": "${ElastiCacheCluster.RedisEndpoint.Address}"}'

Outputs:
  CacheClusterId:
    Description: The ElastiCache Cluster ID
    Value: !Ref ElastiCacheCluster

  RedisHostSecretName:
    Description: The name of the Redis Host Secret
    Value: !Ref RedisHostSecret