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craig-osterhout merged 5 commits into from
Sep 18, 2025
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dhi: update mirror example #23392

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dhi: update mirror example
craig-osterhout Sep 10, 2025
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mirror via tag
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25 changes: 7 additions & 18 deletions content/manuals/dhi/how-to/mirror.md
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Expand Up @@ -181,32 +181,21 @@ attestations using `regctl`. You must [install
$ regctl registry login "$DEST_REG
```

3. Mirror the image by digest from Docker Hub to your destination registry.

First, get a digest for a specific tag and platform. For example, `linux/amd64`.
3. Get a digest for a specific tag and platform. For example, `linux/amd64`.

```console
DIGEST="$(regctl manifest head "${SRC_REPO}:${SRC_TAG}" --platform linux/amd64)"
```

Then, copy the image by digest to ensure you get the exact same image.

```console
regctl image copy \
"${SRC_REPO}@${DIGEST}" \
"${DEST_REG}/${DEST_REPO}@${DIGEST}"
```

4. Mirror the attestations from the Scout registry to your target registry using
`--referrers` and referrer endpoints:
4. Mirror the image and attestations using `--referrers` and referrer endpoints:

```console
$ regctl image copy \
--referrers \
--referrers-src "registry.scout.docker.com/<your-org>/dhi-python" \
--referrers-tgt "${DEST_REG}/${DEST_REPO}" \
"registry.scout.docker.com/<your-org>/dhi-python@${DIGEST}" \
"${DEST_REG}/${DEST_REPO}@${DIGEST}"
"${SRC_REPO}@${DIGEST}" \
"${DEST_REG}/${DEST_REPO}@${DIGEST}"
--referrers \
--referrers-src "registry.scout.docker.com/<your-org>/dhi-python" \
--referrers-tgt "${DEST_REG}/${DEST_REPO}"
```

5. Verify that artifacts were preserved.
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