Proget 2023 - docker manifest problem

[udi.moshe_0021]

Hello,

i am using proget free v2023.
i have created a container feed and attached him to docker hub connectors according to the urls in docker documentation. the connectors are healthy.
the feed allows anonymous pulling and i have con figured the feed in docker as insecure registry.
when i try pulling an image i always get manifest unknown error with\without doing docker login.
i use a proxy to connect to the internet and i do not see any problem there. other feeds like npm works fine.

10x

[atripp]

Hi @udi-moshe_0021 ,

I would suggest using the latest ProGet version.

A "manifest unknown" is a very generic error, and the docker client doesn't log any more details (log, error message from ProGet, etc). I suggest using a traffic capture tool to see exactly what the problem is.

Under the hood, Docker clients can have some problems with proxies, so this could be related. The DockerHub also has rate limiting, so that could be a problem you're experiencing. We just can't see it with just the Docker client sometimes.

Thanks,
Alana

[udi.moshe_0021]

@atripp thank you very much.
will try the update.

thanks

[udi.moshe_0021]

Hi @atripp ,
i have successfully updated to the latest version 2024.19 and get the same error.
i have created a lab in another computer connected directly to the internet (no proxy because i thought that maybe it is blocking something that i can't see) and got the same result. in the lab i used oracle linux 9.4 with podman instead of docker. upon pulling an image directly from docker, the image and the manifest are downloaded correctly.
just to make sure it is possible, i can configure a docker feed and pair up to it docker connectors and it should pull images as proxy like other feeds such as npm, is it ?

thanks

[udi.moshe_0021]

Hi @atripp ,
i have managed to successfully pull an image to proget.
the syntax i used is like: "podman pull xxx:8625/docker/library/ubuntu"
and this i discovered from the podman's response. when i tried looking up the additional "library" in the client setup of the feed or the documentation, i didn't find any thing related to that.
i have tried replacing "library" with something else like "udi" and it didn't work.
i then, tried to download fluent/fluent-id with the syntax "podman pull xxx:8625/docker/library/fluent/fluent-id" and it didn't work. i then deleted the "library" part and it worked.

is this how it is suppose to work ?
images without a prefix will need the "library" prefix ?

thanks

[atripp]

Hi @udi-moshe_0021 ,

If you're talking about connecting to DockerHub, the behavior is a little weird... but yes, images without a prefix need the library prefix. This is actually how the Docker client behaves behind the scenes.

When you request ubuntu, the Docker client actually requests library/ubuntu. You can edit the connector (Advanced tab) to automatically add the library prefix, which will behave like the Docker client.

Thanks,
Alana

[udi.moshe_0021]

Hi @atripp ,
found this config. i remember seeing it and left it checked because the description recommended it for registries like microsoft and for some reason i didn't pay attention to this until i figured out that i need to add "library" prefix.
thank you very much for all the help.