Stalled list of available tags for proxy cache - any way to force upstream call for update?

[szpak]

I use Renovate to bump the artifact & container versions. To reduce network usage and avoid rate limiting, I also use Harbor as a proxy cache to DockerHub (in addition to keep my own images). It works pretty well, but recently, I have bumped into a small issue.

Renovate makes the following call to check the available tags for a given (proxied) image, e.g:

https://my-harbor/v2/proxy/library/maven/tags/list?n=10000

("proxy" is a proxy cache project in Harbor, "library/maven" is an artifact in DockerHub)

In response, Harbor returns (only) the locally available (previously used) tags. No extra hit to DockerHub is performed to fetch all the tags available upstream. When I explicitly request some other version/tag in some other build, it is fetched by Harbor and that new tag is available in the another Renovate's tags/list call. Effectively, it makes the Harbor proxy cache mechanism not very useful for using with Renovate (to discover new upstream tags).

Q. Is it possible to configure Harbor to perform upstream call on tags/list requests? Possibly they could be cached for "some (configured) time" to do not hit the rate limiting and to make that calls faster.

Tested with Harbor v2.1.3-b6de84c5. I know, it is quite old, however, I don't have a newer version available right now. In addition, I haven't seen any related change in the newer changelogs, so I suspect it might be an issue also with the current Harbor version.

[stonezdj]

Please check it on Harbor 2.5.0 or later, this pr #16394 add this feature.

[szpak]

Cool, I will check it out. Thanks for you answer.