When you replicate a docker repository from one artifactory to another, the properties of the manifest.json only consist of
Only after the first pull of the image from the artifactory the properties are created and then it looks like:
This is a problem, when you for example take a backup from the repository on the caching artifactory. The images are useless then, because you get "missing signature key" errors, because of missing properties.
We, for example, use one plugin https://github.com/jfrog/artifactory-user-plugins/tree/master/storage/remoteBackup
But at the moment, that means that the backup does not work for images that were not pulled. And that means nearly all, if you have a active replication cron running.