Feature Request: support multiarch docker images

[patrickdung]

Is this a request for help?: No

Is this a BUG REPORT or a FEATURE REQUEST? (choose one): Feature Request

Version of Anchore Engine and Anchore CLI if applicable: anchore-cli, version 0.9.3

What happened: Anchore engine shows the report of a container that only matches my local platform.

The docker image is in GitLab Registry. The docker image has a single tag, but it actually has two platform: x86_64 and arm64.

The report of anchore-engine only shows the info for x86_64. There is no options or method to show the info for arm64.

Edit 1: I could do this with Trivy for checking a specific SHA/platform (Arm) of an image:

trivy image --security-checks vuln,config registry.provider/username/repo-name@sha256:69c244848b668314706e6d53121b52db4760354d9e36ca84547a51c41b42d16f

But I can't do this with anchore.

What did you expect to happen: Having options to choose the architecture of the container image. Or Anchore could scan all available platform of the container image.

Any relevant log output from /var/log/anchore:

What docker images are you using: anchore-engine-1.15.1 install by Helm chart

How to reproduce the issue:

Anything else we need to know: The image should have both arm64 and amd64 manifest, using the skopeo inspect --raw option.

{
   "mediaType": "application/vnd.docker.distribution.manifest.list.v2+json",
   "schemaVersion": 2,
   "manifests": [
      {
         "mediaType": "application/vnd.docker.distribution.manifest.v2+json",
         "digest": "sha256:62675d5d2859ceccbe7339703c9f14c7aff4a9f41a05c066681852d5fc5ced07",
         "size": 1582,
         "platform": {
            "architecture": "amd64",
            "os": "linux"
         }
      },
      {
         "mediaType": "application/vnd.docker.distribution.manifest.v2+json",
         "digest": "sha256:69c244848b668314706e6d53121b52db4760354d9e36ca84547a51c41b42d16f",
         "size": 1581,
         "platform": {
            "architecture": "arm64",
            "os": "linux"
         }
      }
   ]
}