Docker Migration from Nexus – Feature Not Working

[koksime.yap_5909]

Hi @rhessinger ,

Just checking in to see if you had a chance to look into this.

And I’d like to know whether a product fix is planned, or if I should rely on the workaround.

Thanks.

[rhessinger]

Hi @koksime-yap_5909,

I apologize for the delay. This is next on my list to review and I will have an update for you on Monday.

Thanks,
Rich

[rhessinger]

Hi @koksime-yap_5909,

After looking into this further, although we can fix the import to handle the images without a media type, it will still be broken when you attempt to pull those images using the Docker client. This is because ProGet will only send the manifest as it is stored in ProGet, where Nexus will manipulate it to match the accept headers of the client. Since it is only returning the manifest as it is stored, the media type will be null which will cause the Docker client to fail with a missing or empty Content-Type header.

Since we cannot assume what the mediaType should be, I think it would be better to resolve those prior to importing into ProGet. The nice thing is you can use the import logs to identify what images are missing the media type. You can run the import multiple times and it will only import the missing images and layers.

Thanks,
Rich

[koksime.yap_5909]

Hi @rhessinger,

Thanks for taking the time to investigate this and for the detailed update.

Given that the fix likely won’t work, I’ll proceed with the workaround on my side.

Appreciate the help.

[rhessinger]

Hi @koksime-yap_5909,

No problem! Happy to help!

Thanks,
Rich