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query the image digest of a tag from the registry

See original GitHub issue


  • Jib version: jib-core 0.11.0
  • Build tool: maven 3.6
  • OS: macos

Description of the issue:

Looking at the ManifestPuller doesn’t read the response header of Docker-Content-Digest to get the sha256 digest you can use and pass to tools like docker pull <image-name>@sha256:.... or kubectl set image deployment/name container=<image-name>@sha256... for CI/ CD purposes.

Expected behavior:

A new method getDigest() from the puller

Steps to reproduce: Run the following test:

public class RegistryTest {
    public void registryDigest() throws IOException, RegistryException {
        RegistryClient.Factory factory = RegistryClient.factory(EventHandlers.NONE, "", "library/centos");
        Authorization auth = factory.newRegistryClient().getRegistryAuthenticator().get().authenticatePull(null);
        RegistryClient client = factory.newRegistryClient();

        V22ManifestListTemplate manifest = client.pullManifest("7", V22ManifestListTemplate.class);
        // If this gets stale, update by getting the output of
        // skopeo  inspect docker://centos:7 | jq '.Digest' -r
        Assertions.assertEquals("sha256:307835c385f656ec2e2fec602cf093224173c51119bbebd602c53c3653a3d6eb", manifest.getDigest());

        // These refer to other digests found in the manifest.json
//        Assertions.assertEquals("foo", manifest.getDigestsForPlatform("amd64", "linux"));
//        V22ManifestTemplate manifest = client.pullManifest("7", V22ManifestTemplate.class);
//        Assertions.assertEquals("foo", manifest.getContainerConfiguration().getDigest());

Log output:

none, the code doesn’t compile

Issue Analytics

  • State:closed
  • Created 4 years ago
  • Comments:6 (4 by maintainers)

github_iconTop GitHub Comments

tejaskasettycommented, Oct 9, 2019

@chanseokoh I have made the changes. If its fine I will go ahead with making changes to the test cases.

aespinosacommented, Oct 18, 2019

thanks! i’ll keep note of that.

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