Docker Support

Some images like windows base images, contain artifacts whose distribution is restricted by license.
These artifacts are called foreign layers.
We should not upload these layers from the skopeo copy output.

• skopeo copy dir transport downloads foreign layers

We will check the mediatype of the layer and skip the upload of the foreign layers.

[ipanova@ina tips]$ sudo skopeo copy docker://portainer/portainer:windows-amd64-1.13.0 dir:existingemptydirectory2
Getting image source signatures
Copying blob sha256:bce2fbc256ea437a87dadac2f69aabd25bed4f56255549090056c1131fad0277
 240.98 MB / 240.98 MB [=================================================] 2m57s
Copying blob sha256:4a8c367fd46d2e2da2a8b0fa02158540e13b3a9015daf9f17d1af354a591492f
 116.32 MB / 116.32 MB [=================================================] 2m11s
Copying blob sha256:feedefe2c110863b761bb71ba7199fefe1058afecbe68752d051c2ca0899e266
 3.51 MB / 3.51 MB [========================================================] 0s
Copying blob sha256:bb652e12abcfb1b0681c29dcff44a842f54869d6a5d6c57de1523b275af77c17
 952 B / 952 B [============================================================] 0s
Copying blob sha256:4addfdf3b551b41da10b28fb9e0e0702d568e68ce2330183220384358f0f7d9c
 947 B / 947 B [============================================================] 0s
Copying blob sha256:ad5cdcb7aa1e047a4ac348b74b5652c8a16fcb3dd013c288f8e65a095995c1d4
 948 B / 948 B [============================================================] 0s
Copying blob sha256:6bd5a5818cacdc9744192da603a8765e793ac1b5dcb1bf1efacbe81df875ea06
 943 B / 943 B [============================================================] 0s
Copying config sha256:7cc9ff24526dfffdb8c188e6bae7e11d75d1ac5731d85e6fdccd5c7382d84207
 2.31 KB / 2.31 KB [========================================================] 0s
Writing manifest to image destination
Storing signatures
[ipanova@ina tips]$ ll existingemptydirectory2/
total 369524
-rw-r--r--. 1 root root 121971948 Jun  8 13:38 4a8c367fd46d2e2da2a8b0fa02158540e13b3a9015daf9f17d1af354a591492f
-rw-r--r--. 1 root root       947 Jun  8 13:38 4addfdf3b551b41da10b28fb9e0e0702d568e68ce2330183220384358f0f7d9c
-rw-r--r--. 1 root root       943 Jun  8 13:38 6bd5a5818cacdc9744192da603a8765e793ac1b5dcb1bf1efacbe81df875ea06
-rw-r--r--. 1 root root      2369 Jun  8 13:38 7cc9ff24526dfffdb8c188e6bae7e11d75d1ac5731d85e6fdccd5c7382d84207
-rw-r--r--. 1 root root       948 Jun  8 13:38 ad5cdcb7aa1e047a4ac348b74b5652c8a16fcb3dd013c288f8e65a095995c1d4
-rw-r--r--. 1 root root       952 Jun  8 13:38 bb652e12abcfb1b0681c29dcff44a842f54869d6a5d6c57de1523b275af77c17
-rw-r--r--. 1 root root 252691002 Jun  8 13:36 bce2fbc256ea437a87dadac2f69aabd25bed4f56255549090056c1131fad0277
-rw-r--r--. 1 root root   3684048 Jun  8 13:38 feedefe2c110863b761bb71ba7199fefe1058afecbe68752d051c2ca0899e266
-rw-r--r--. 1 root root      1982 Jun  8 13:38 manifest.json
-rw-r--r--. 1 root root        33 Jun  8 13:33 version

$ ./done-docker-token portainer/portainer:windows-amd64-1.13.0
{
  "schemaVersion": 2,
  "config": {
    "digest": "sha256:7cc9ff24526dfffdb8c188e6bae7e11d75d1ac5731d85e6fdccd5c7382d84207",
    "size": 2369,
    "mediaType": "application/vnd.docker.container.image.v1+json" 
  },
  "layers": [
    {
      "digest": "sha256:bce2fbc256ea437a87dadac2f69aabd25bed4f56255549090056c1131fad0277",
      "size": 252691002,
      "mediaType": "application/vnd.docker.image.rootfs.foreign.diff.tar.gzip",
      "urls": [
        "https://go.microsoft.com/fwlink/?linkid=837858" 
      ]
    },
    {
      "digest": "sha256:4a8c367fd46d2e2da2a8b0fa02158540e13b3a9015daf9f17d1af354a591492f",
      "size": 121971948,
      "mediaType": "application/vnd.docker.image.rootfs.foreign.diff.tar.gzip",
      "urls": [
        "https://go.microsoft.com/fwlink/?linkid=848906" 
      ]
    },
    {
      "digest": "sha256:feedefe2c110863b761bb71ba7199fefe1058afecbe68752d051c2ca0899e266",
      "size": 3684048,
      "mediaType": "application/vnd.docker.image.rootfs.diff.tar.gzip" 
    },
    {
      "digest": "sha256:bb652e12abcfb1b0681c29dcff44a842f54869d6a5d6c57de1523b275af77c17",
      "size": 952,
      "mediaType": "application/vnd.docker.image.rootfs.diff.tar.gzip" 
    },
    {
      "digest": "sha256:4addfdf3b551b41da10b28fb9e0e0702d568e68ce2330183220384358f0f7d9c",
      "size": 947,
      "mediaType": "application/vnd.docker.image.rootfs.diff.tar.gzip" 
    },
    {
      "digest": "sha256:ad5cdcb7aa1e047a4ac348b74b5652c8a16fcb3dd013c288f8e65a095995c1d4",
      "size": 948,
      "mediaType": "application/vnd.docker.image.rootfs.diff.tar.gzip" 
    },
    {
      "digest": "sha256:6bd5a5818cacdc9744192da603a8765e793ac1b5dcb1bf1efacbe81df875ea06",
      "size": 943,
      "mediaType": "application/vnd.docker.image.rootfs.diff.tar.gzip" 
    }
  ],
  "mediaType": "application/vnd.docker.distribution.manifest.v2+json"