Caching

Connaisseur utilizes Redis as a cache. For each image reference the resolved digest or validation error is cached. This drastically boosts the performance of Connaisseur compared to older non-caching variants. The expiration for keys in the cache defaults to 30 seconds, but can be tweaked. If set to 0, no caching will be performed and the cache will not be deployed as part of Connaisseur.

Configuration options

cache in charts/connaisseur/values.yaml under application.features supports the following configuration:

Key	Default	Required	Description
expirySeconds	30	-	Number of seconds for which validation results are cached. If set to 0, the Connaisseur deployment will omit the caching infrastructure in its entirety.
cacheErrors	true	-	Whether validation failures are cached. If set to false, Connaisseur will only cache successfully validated image digests instead of also caching errors.

Example

In charts/connaisseur/values.yaml:

application:
  features:
    cache:
      expirySeconds: 15
      cacheErrors: false