Update/Downgrade an container to a specific tag via http api mode

[JensWinkler91]

Is your feature request related to a problem? Please describe.

I'd like to update OR downgrade a specific container via http mode.
I'm using localhost:8080/v1/update?images=<image_name> to update my containers via http.
However, in case the new container contain any errors I'd like to downgrade them again to the tag that was used before.

Describe the solution you'd like

Allow to add an image name with a certain tag.
In this way we could define which tag should be used.

Example:
localhost:8080/v1/update?images=<image_name>:<tag>

Describe alternatives you've considered

Another possibility would be an api call "downgrade". The approach, however, would be less flexible as it would only reset the container to the penultimate tag.

Example:
localhost:8080/v1/downgrade?images=<image_name>

Additional context

No response

[lluisd]

It will be nice to have an API endpoint to manually update an specific container, that is in monitory only mode, to the last image available. To avoid to manually update the stale ones that I don't want to update it automatically.

I know that I can run multiple instances of watchtower with diferent scopes but I only want to update manually an specific container.

So considering the endpoint like localhost:8080/v1/update?images=<image_name> to keep it simple for now.

[JensWinkler91]

Maybe i get you wrong but i think you can already update certain containers via API: curl -H "Authorization: Bearer mytoken" localhost:8080/v1/update?image=foo/bar,foo/baz (https://github.com/containrrr/watchtower/blob/main/docs/http-api-mode.md)

The feature I'm missing is to update a container with a specific tag.
Can anyone tell me if this feature will be coming in the future?

[heyromnivan]

I would also add a usecase - we have several environments where service is running (dev, test, live, etc) and we'd like a finer control over which version (tag) is deployed where.
Our current solution is just build+push+trigger watchtower in the same CI pipeline run, to make it unlikely for someone elses image version slipping in before watchtower checks for updates. But that's a lot of overhead.

[JRHemmen]

+1 for this, would be nice to be able to use watchtower with specific version tags rather than relying on latest

[BenjaminFaal]

@heyromnivan @JRHemmen i just added this in #2054