ElastiCache operations

Category	✅ Supported	❌ Unsupported
General	22	2

Operation	Status	Notes	AWS Docs
AddTagsToResource	✅ Supported	ARN-scoped tag storage	docs
CreateCacheCluster	✅ Supported	Docker-backed (redis/valkey/memcached); async creating→available once the engine answers PING; a cache that never answers ends in incompatible-network; port auto-alloc; PreferredAvailabilityZone, CacheParameterGroupName and inline Tags round-trip; the CloudFormation resource’s Port, VpcSecurityGroupIds, AZMode, TransitEncryptionEnabled, SnapshotRetentionLimit, NotificationTopicArn, PreferredMaintenanceWindow, AutoMinorVersionUpgrade and LogDeliveryConfigurations are not modeled	docs
CreateCacheParameterGroup	✅ Supported	Stores name, family, description, and ARN	docs
CreateCacheSubnetGroup	✅ Supported	Stores name, description, and subnet IDs	docs
CreateReplicationGroup	✅ Supported	Docker-backed (single primary node); async creating→available once the primary answers PING; a group that never answers ends in create-failed; CacheSubnetGroupName places the group in that subnet group’s VPC; Engine/EngineVersion pick the container image (redis/valkey/memcached) — previously dropped on Create, defaulting every group to redis regardless of the template (#543); SnapshotRetentionLimit and PrimaryClusterId also round-trip from Create; the CloudFormation resource’s NumCacheClusters, NumNodeGroups, ReplicasPerNodeGroup, CacheParameterGroupName, AtRestEncryptionEnabled, TransitEncryptionEnabled, AuthToken, KmsKeyId, UserGroupIds, CacheSecurityGroupNames, LogDeliveryConfigurations, Tags, NotificationTopicArn, PreferredMaintenanceWindow, SnapshotWindow and SecurityGroupIds are not modeled	docs
CreateServerlessCache	✅ Supported	Docker-backed (redis/valkey/memcached); async creating→available once the engine answers PING; a cache that never answers ends in create-failed; CloudFormation ServerlessCache supported	docs
DeleteCacheCluster	✅ Supported	Sets status to “deleting”; stops and removes Docker container asynchronously	docs
DeleteCacheParameterGroup	✅ Supported	Removes stored parameter group	docs
DeleteCacheSubnetGroup	✅ Supported	Removes stored subnet group	docs
DeleteReplicationGroup	✅ Supported	Sets status to “deleting”; stops and removes Docker container asynchronously	docs
DeleteServerlessCache	✅ Supported	Sets status to “deleting”; stops and removes Docker container asynchronously	docs
DescribeCacheClusters	✅ Supported	List all or filter by CacheClusterId	docs
DescribeCacheEngineVersions	❌ Unsupported	stub; returns 501	docs
DescribeCacheParameterGroups	✅ Supported	List all or filter by name	docs
DescribeCacheParameters	✅ Supported	Returns curated static parameters for the group’s family; supports Source filter and MaxRecords/Marker pagination	docs
DescribeCacheSubnetGroups	✅ Supported	List all or filter by name	docs
DescribeReplicationGroups	✅ Supported	List all or filter by ReplicationGroupId	docs
DescribeServerlessCaches	✅ Supported	List all or filter by ServerlessCacheName	docs
ListTagsForResource	✅ Supported	Returns all tags for an ARN	docs
ModifyCacheCluster	✅ Supported	Metadata-only; updates nodeType, engineVersion, numNodes, parameterGroup; modifying→available	docs
ModifyReplicationGroup	✅ Supported	Metadata-only; updates description, nodeType, failover, multiAZ; modifying→available	docs
ModifyServerlessCache	✅ Supported	Metadata-only; updates description, engine/version, usage limits, security groups, snapshots, and user group; modifying→available	docs
RebootCacheCluster	❌ Unsupported	stub; returns 501	docs
RemoveTagsFromResource	✅ Supported	Removes specific tag keys	docs