Review needed to correct this ElastiCache CloudFormation Template - amazon-web-services

Question

This template is used to create a ElastiCache- Redis cluster.
Its showing me errors like - 1 validation error detected: Value '[AWS::ElastiCache::CacheCluster, AWS::EC2::SecurityGroup::Id]' at 'typeNameList' failed to satisfy constraint: Member must satisfy constraint: [Member must have length less than or equal to 204, Member must have length greater than or equal to 10, Member must satisfy regular expression pattern: [A-Za-z0-9]{2,64}::[A-Za-z0-9]{2,64}::[A-Za-z0-9]{2,64}(::MODULE){0,1}].
Wanted to know if the parameters are declared rightly or not.
AWSTemplateFormatVersion: 2010-09-09
Description: Create ElastiCache and related resources
Parameters:
VPC:
Description: VPC
Type: AWS::EC2::VPC::Id
Subnet:
Description: Subnet
Type: AWS::EC2::Subnet::Id
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.
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
Resources:
SecurityGroup:
Type: AWS::EC2::SecurityGroup::Id
Properties:
GroupDescription: ElastiCache Security Group
VpcId: !Ref VPC
SecurityGroupIngress:
- IpProtocol: tcp
FromPort: 6379
ToPort: 6379
- IpProtocol: tcp
FromPort: 11211
ToPort: 11211
Tags:
-
Key: Name
Value: "App-SG"
ElastiCacheCluster:
Type: AWS::ElastiCache::CacheCluster
Properties:
AutoMinorVersionUpgrade: !Ref AutoMinorVersionUpgrade
Engine: !Ref CacheEngine
CacheNodeType: !Ref CacheNodeType
ClusterName : !Ref ClusterName
NumCacheNodes: !Ref CacheNodeCount
CacheSubnetGroupName: !Ref Subnet
VpcSecurityGroupIds: !Ref SecurityGroup
Tags:
- Key: Name
Value: ElastiCache-Redis
Also it will be helpful to review the entire template to avoid more errors.Main issues seem to appear from resource section.

Answer 1

This question is old and I'm sure OP found the resolution but for anyone else who may come across this question - I believe the issue is that ElastiCacheCluster.VpcSecurityGroupIds must be a list, whereas !Ref SecurityGroup will simply return the ID of the security group as a string.
In addition, since both resources are created by the same template, we should make sure that the security group will be created first, otherwise referencing it will cause an error when the Elasticache cluster is created.
Here's the ElastiCache::CacheCluster resource with a list as the value of VpcSecurityGroupIds and a dependency on the security group.
ElastiCacheCluster:
Type: AWS::ElastiCache::CacheCluster
Properties:
AutoMinorVersionUpgrade: !Ref AutoMinorVersionUpgrade
Engine: !Ref CacheEngine
CacheNodeType: !Ref CacheNodeType
ClusterName : !Ref ClusterName
NumCacheNodes: !Ref CacheNodeCount
CacheSubnetGroupName: !Ref Subnet
VpcSecurityGroupIds:
- !Ref SecurityGroup
Tags:
- Key: Name
Value: ElastiCache-Redis
DependsOn: SecurityGroup

Answer 2

I had the same error messages and landed here.
Turns out that in my case, the problem was an incorrect type.
I had AWS::IAM:Role instead of AWS::IAM::Role (1 : vs 2)