cacheTagConfig

Configuration for cache tag extraction from origin responses. When specified, CloudFront reads the header named in HeaderName from origin responses and stores the comma-separated values as cache tags on the object.

Distributions without CacheTagConfig do not extract tags. When CacheTagConfig is removed from a distribution via UpdateDistribution, CloudFront stops extracting tags from origin responses.

Changing the HeaderName on an existing distribution does not retroactively affect previously cached objects. Tag-based invalidations will not apply to objects already cached using a previous header. To ensure tag invalidations function after updating the header name, use path-based invalidations to recache all objects that use cache tags.