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Amazon ElastiCache
User Guide (API Version 2015-02-02)

Determine Available Engine Versions

Not all versions of an engine are available in every region. Therefore, before you create a cluster or replication group, you should determine which engine versions are supported in your region.

You can determine which engine versions are supported in a region using the ElastiCache console, the AWS CLI, or the ElastiCache API.

Determine Available Engine Versions (Console)

When creating a cluster or replication group you are asked to choose an engine version from a list. The engine versions in the list are those available in the current region.

For more information, see Creating a Cluster or Creating a Redis Cluster with Replicas from Scratch.

Determine Available Engine Versions (AWS CLI)

To determine which engine versions are available in a region, use the describe-cache-engine-versions operation.

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aws elasticache describe-cache-engine-versions

The output of this operation should looks something like this (JSON format).

{
    "CacheEngineVersions": [
        {
            "Engine": "memcached", 
            "CacheEngineDescription": "memcached", 
            "CacheEngineVersionDescription": "memcached version 1.4.14", 
            "CacheParameterGroupFamily": "memcached1.4", 
            "EngineVersion": "1.4.14"
        }, 
        ... some output omitted for brevity
        {
            "Engine": "redis", 
            "CacheEngineDescription": "Redis", 
            "CacheEngineVersionDescription": "redis version 2.8.6", 
            "CacheParameterGroupFamily": "redis2.8", 
            "EngineVersion": "2.8.6"
        }
    ]
}

For more information, see describe-cache-engine-versions.

Determine Available Engine Versions (ElastiCache API)

To determine which engine versions are available in a region, use the DescribeCacheEngineVersions action.

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https://elasticache.us-west-2.amazonaws.com/ ?Action=DescribeCacheEngineVersions &Version=2015-02-02 &SignatureVersion=4 &SignatureMethod=HmacSHA256 &Timestamp=20150202T192317Z &X-Amz-Credential=<credential>

For more information, see DescribeCacheEngineVersions.