Earlier quoted context omitted.
Or you could, you know, host a Docker registry and reupload those images to something you control. Worst case scenario, in 30 days, nothing is gone from Docker and you can just spin it down. Your job as an SRE is not to look at things and go "oh well, nothing we can do lol".
Imagine you shipped software that included references to docker hub images. That software will no longer work if any of the referenced images are deleted from docker hub. This will be the case with any helm charts that reference images that are deleted from docker hub. Some of those charts will not have variables that let you override the docker images and tags, so some of those will not be usable without creating a…
Vendor your helm charts if they are production critical. Vendor the docker images if they are production critical. Vendor the libraries if they are critical.
As an added bonus, you even help making a saner internet where you don't pull left-pad three billion times a month.