Get the docker image size from Jfrog Artifactory - docker

Question

I have docker images stored in jFrog artifactory and I need to get the size of those docker images without pulling it. I tried to figure out if there is any direct REST API provided by jFrog but couldn’t find any.
I also tried one solution by doing a curl request to fetch all the docker layers and to sum all the layers. But I’m looking if there is any feasible solution other than the above?

Answer 1

You can try and use regclient.
It does allow to inspect images without pulling the layers, allowing quick access to the image manifest and configuration.
And the manifest include the size of the image.
Start with the regctl manifest command:
regctl manifest get <yourJFrogName>/<yourImageName>:<tag>
Or:
regctl image inspect --format '{{jsonPretty .}}' <yourJFrogName>/<yourImageName>:<tag>
It should include the total size:
$ regctl manifest get localhost:5000/artifact:demo
Name: localhost:5000/artifact:demo
MediaType: application/vnd.oci.image.manifest.v1+json
Digest: sha256:36484d44383fc9ffd34be11da4a617a96cb06b912c98114bfdb6ad2dddd443e2
Annotations:
demo: true
format: oci
Total Size: 64B

Answer 2

JFrog provides a get artifact details REST API where you can get the file size of the image with below REST API.
curl -u admin -X GET http://localhost:8082/artifactory/api/storage/docker-local/nginx/latest/manifest.json -H "Content-type: application/json"
This will give the following output along with the size.
{
"repo" : "docker-local",
"path" : "/nginx/latest/manifest.json",
----------
"downloadUri" : "https://localhost:8082/artifactory/docker-local/nginx/latest/manifest.json",
"mimeType" : "application/json",
"size" : "1570",
"checksums" : {
"sha1" : "cc357b563ce443aa8270eb34e6755458a1a46869",
--------
},
"originalChecksums" : {
"sha256" : "89020cd33be2767f3f894484b8dd77bc2e5a1ccc864350b92c53262213257dfc"
},
"uri" : "https://localhost:8082/artifactory/api/storage/docker-local/nginx/latest/manifest.json"
}