Get container image label without pulling the image from GCR - google-cloud-platform

Question

I am trying to create a dataset for at least 250 container images built by docker and pushed to a single GCP project on Google Container Repository (GCR). The GCR is highly active, thus it changes the version quite frequently, thus the automation.
All of these images add a certain label at the time of push from the CI system. I want to add those labels in the dataset. I tried accessing the label and its value after pulling the image, however, pulling 250+ images and then inspecting them is taking too much resources on this automation and may not even be possible.
So in short, I just want to know if there's any gcloud API (REST or CLI) which can fetch the label metadata without pulling the image first?
I tried looking in the docs, but couldn't find anything. I tried the following command which only gives the SHA256 digest and the repository details, but not labels
gcloud container images describe gcr.io/[PROJECT-ID]/[IMAGE]
# Output
image_summary:
digest: sha256:[SHA_DIGEST_HERE]
fully_qualified_digest: gcr.io/[PROJECT-ID]/[IMAGE]#sha256:[SHA_DIGEST_HERE]
registry: gcr.io
repository: [PROJECT-ID]/[IMAGE]
Update:
I tried the curl command with the access token which gave me different layers instead
$> curl https://gcr.io:443/v2/[PROJECT-ID]/[IMAGE]/manifests/latest -H "Authorization: Bearer {token}"
// output
{
"schemaVersion": 2,
"mediaType": "application/vnd.docker.distribution.manifest.v2+json",
"config": {
"mediaType": "application/vnd.docker.container.image.v1+json",
"size": [size],
"digest": "sha256:[SHA_256_DIGEST]"
},
"layers": [
// different layers here
]
}
Not sure how can I actually extract the manifest itself and look into it.
I want something like what this question is asking, but for GCR instead of dockerhub.

Answer 1

As of the moment, only Artifact Registry has the Label Repositories option to identify and group related repositories.
I would suggest if you want to use labels, you may want to migrate from Google Container Registry to Artifact Registry in order to use Label Repositories.
Another option is you may want to file this one as a feature request. Please be advised that this doesn't have a specific ETA however you can still keep track of the progress by following the thread once the ticket has been created.