ElastiCache

Overview

CloudMock emulates Amazon ElastiCache, supporting cache clusters, replication groups, subnet groups, parameter groups, snapshots, tagging, and failover testing. Cluster states transition creating -> available -> modifying -> deleting.

Supported Operations

Operation	Status	Notes
CreateCacheCluster	Supported	Creates a Redis or Memcached cache cluster
DescribeCacheClusters	Supported	Lists cache clusters with optional ID filter
ModifyCacheCluster	Supported	Modifies node type, engine version, or node count
DeleteCacheCluster	Supported	Deletes a cache cluster
CreateReplicationGroup	Supported	Creates a Redis replication group with primary/replica nodes
DescribeReplicationGroups	Supported	Lists replication groups
ModifyReplicationGroup	Supported	Modifies description, node type, or failover settings
DeleteReplicationGroup	Supported	Deletes a replication group
CreateCacheSubnetGroup	Supported	Creates a subnet group
DescribeCacheSubnetGroups	Supported	Lists subnet groups
DeleteCacheSubnetGroup	Supported	Deletes a subnet group
CreateCacheParameterGroup	Supported	Creates a parameter group
DescribeCacheParameterGroups	Supported	Lists parameter groups
DeleteCacheParameterGroup	Supported	Deletes a parameter group
CreateSnapshot	Supported	Creates a snapshot from a cluster or replication group
DescribeSnapshots	Supported	Lists snapshots with optional filters
DeleteSnapshot	Supported	Deletes a snapshot
AddTagsToResource	Supported	Adds tags to clusters, replication groups, and snapshots
RemoveTagsFromResource	Supported	Removes tags from a resource
ListTagsForResource	Supported	Lists tags for a resource
TestFailover	Supported	Simulates a failover test for a replication group

Quick Start

Node.js

import { ElastiCacheClient, CreateCacheClusterCommand } from '@aws-sdk/client-elasticache';

const client = new ElastiCacheClient({
  endpoint: 'http://localhost:4566',
  region: 'us-east-1',
  credentials: { accessKeyId: 'test', secretAccessKey: 'test' },
});

await client.send(new CreateCacheClusterCommand({
  CacheClusterId: 'my-cache',
  Engine: 'redis',
  CacheNodeType: 'cache.t3.micro',
  NumCacheNodes: 1,
}));

Python

import boto3

client = boto3.client('elasticache',
    endpoint_url='http://localhost:4566',
    region_name='us-east-1',
    aws_access_key_id='test',
    aws_secret_access_key='test')

client.create_cache_cluster(
    CacheClusterId='my-cache',
    Engine='redis',
    CacheNodeType='cache.t3.micro',
    NumCacheNodes=1)

Configuration

cloudmock.yml

services:
  elasticache:
    enabled: true

Known Differences from AWS

• No actual Redis or Memcached engine is provisioned
• Cache endpoints are generated but not functional
• Failover testing updates status but does not simulate real failover