Cannot modify Ryuk image

[mdelapenya]

Discussed in #2044

^{Originally posted by lalloni December 22, 2023}
I tried both mechanisms for overriding image names (TESTCONTAINERS_HUB_IMAGE_NAME_PREFIX env var and using an ImageSubstitutor implementation) to prefix the Ryuk image name with an internal registry URL. Both methods failed and were completely ignored for the Ryuk image. They worked for the other images we are running, though.

I think the issue is most likely caused by the fact that the default Ryuk image is defined as

ReaperDefaultImage = "docker.io/testcontainers/ryuk:0.5.1"

And that constant includes the docker.io/ string prefix, making it non-overridable (according to documentation).

How should we do this?

If the right way of fixing the issue is changing the default image name to the following, I would be happy to send a PR:

ReaperDefaultImage = "testcontainers/ryuk:0.5.1"