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scottrigby/zot-kind-helm-skopeo.md

Last active December 6, 2022 09:39
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Inspect OCI artifact locally (Zot, kind, Helm, and Skopeo)
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zot-kind-helm-skopeo.md

  1. setup

    $ kind create cluster

  2. install zot with minimal image for security-minded dist-spec-only

    $ helm upgrade zot zot/zot --set image.repository=ghcr.io/project-zot/zot-minimal-linux-amd64

  3. port-forward service for ease

    $ kubectl port-forward svc/zot 5000:5000

  4. Test pushing a bare helm chart to zot

    $ helm create foo && helm package foo
$ helm push foo-0.1.0.tgz oci://127.0.0.1:5000

  5. inspect OCI package with Skopeo

    $ skopeo inspect --raw --tls-verify=false docker://127.0.0.1:5000/foo:0.1.0 | jq
{
  "schemaVersion": 2,
  "config": {
    "mediaType": "application/vnd.cncf.helm.config.v1+json",
    "digest": "sha256:af9c03c64b1d3d1c76a09d75faf3fd1c8b9ccc97ce0d31e464bccf68fe236674",
    "size": 137
  },
  "layers": [
    {
      "mediaType": "application/vnd.cncf.helm.chart.content.v1.tar+gzip",
      "digest": "sha256:dce0001b81ca61d8710bce34361bdfc05748459adf008a101126508fb7e05309",
      "size": 3750
    }
  ]
}

  6. cleanup

    $ kind delete cluster
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