aws-cloudformation-elasticache_skill

Overview

This skill provides production-ready AWS CloudFormation patterns for provisioning Amazon ElastiCache (Redis and Memcached). It includes templates and reusable building blocks for clusters, replication groups, parameter groups, subnet groups, security, and template sections (Parameters, Mappings, Conditions, Outputs). Use it to create modular, validated, and cross-stack friendly caching infrastructure.

How this skill works

The skill supplies CloudFormation YAML examples and snippets that define ElastiCache resources and surrounding network and parameter constructs. It shows how to declare Parameters (including AWS-specific types), Mappings for region/type data, Conditions for environment variants, and Outputs for cross-stack references. Examples cover standalone Redis clusters, Redis replication groups, and Memcached clusters with parameter groups, subnet groups, security groups, backups, and monitoring hooks.

When to use it

• When you need a new Redis cluster or Memcached cluster deployed via CloudFormation
• When building high-availability Redis using ReplicationGroup with automatic failover
• When creating parameter groups, subnet groups, and VPC-aware cache deployments
• When you want strong template validation using AWS parameter types and constraints
• When designing modular stacks with Outputs and cross-stack references
• When you need repeatable production patterns (backups, monitoring, encryption)

Best practices

• Use AWS::ElastiCache parameter types and AllowedValues to validate inputs in the console
• Group network resources (subnet groups, security groups) and expose only necessary Outputs
• Use Conditions and Mappings to support multiple environments and region-specific values
• Define ParameterGroups for engine tuning and store sensitive values in SSM where appropriate
• Enable automatic backups, CloudWatch metrics, and Multi-AZ/AutomaticFailover for production
• Keep templates modular: export endpoints and IDs for cross-stack composition

Example use cases

• Create a dev Redis cluster with a simple CacheSubnetGroup and one cache node
• Deploy a production Redis ReplicationGroup with Multi-AZ, replicas, and automatic failover
• Provision a Memcached cluster for horizontally scaled session caching
• Define a custom Redis ParameterGroup with maxmemory-policy and timeout adjustments
• Compose a cross-stack architecture where application stacks import the cache endpoint Output