docker push to private repository pushes already pushed layers

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      I have a docker pipelines script that ends with

      - docker login --username $DOCKER_HUB_USERNAME --password $DOCKER_HUB_PASSWORD <our-private-repo>
      - docker push $IMAGE
      

      However, it looks like docker pushes images that are already present in the repository. I get the following output. This takes quite a bit of time as these layers are large.

      b92ae2c28af1: Preparing
      7bb9bf8c293d: Preparing
      2939806abd05: Preparing
      eb84ae861586: Preparing
      227d94b074c0: Preparing
      066828d986f0: Preparing
      daa6e91e491c: Preparing
      6b60013e5875: Preparing
      d6335a641f5e: Preparing
      5c33df241050: Preparing
      ffc4c11463ee: Preparing
      daa6e91e491c: Waiting
      6b60013e5875: Waiting
      d6335a641f5e: Waiting
      066828d986f0: Waiting
      ffc4c11463ee: Waiting
      7bb9bf8c293d: Pushed
      b92ae2c28af1: Pushed
      eb84ae861586: Pushed
      daa6e91e491c: Pushed
      066828d986f0: Pushed
      227d94b074c0: Pushed
      5c33df241050: Pushed
      d6335a641f5e: Pushed
      ffc4c11463ee: Pushed
      2939806abd05: Pushed
      6b60013e5875: Pushed
      

      When I do the exact same command on my own machine (Docker version 17.12.0-ce, build c97c6d6) I get the following (i.e. only the newly built last layer is actually being pushed. The id:s of the previous layers are the same for each build, but somehow the pipelines docker push does not recognize that the layers have already been pushed (by a previous build).

      3133fd13fb37: Pushed
      7bb9bf8c293d: Layer already exists
      2939806abd05: Layer already exists
      eb84ae861586: Layer already exists
      227d94b074c0: Layer already exists
      066828d986f0: Layer already exists
      daa6e91e491c: Layer already exists
      6b60013e5875: Layer already exists
      d6335a641f5e: Layer already exists
      5c33df241050: Layer already exists
      ffc4c11463ee: Layer already exists
      

      Our repository is using the registry:2 image of the docker registry.

            Assignee:
            Unassigned
            Reporter:
            MartinNorback
            Votes:
            12 Vote for this issue
            Watchers:
            16 Start watching this issue

              Created:
              Updated:
              Resolved: