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Add support statement for the Quay registry #373

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bobcallaway merged 1 commit into from
Mar 25, 2025
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Add support statement for the Quay registry #373

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1 change: 1 addition & 0 deletions content/en/cosign/system_config/registry_support.md
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Expand Up @@ -22,6 +22,7 @@
* Digital Ocean Container Registry
* Sonatype Nexus Container Registry
* Alibaba Cloud Container Registry
* Quay.io and Project Quay Container Registry

We aim for wide registry support. To sign images in registries which do not yet fully support OCI media types, one may need to use `COSIGN_DOCKER_MEDIA_TYPES` to fall back to legacy equivalents. For example:

Expand All @@ -32,8 +33,8 @@
Please help test and file bugs if you see issues!
Instructions can be found in the [tracking issue](https://github.com/sigstore/cosign/issues/40).

## Rekor support

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_Note: this is an experimental feature_

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To publish signed artifacts to a Rekor transparency log and verify their existence in the log
set the `COSIGN_EXPERIMENTAL=1` environment variable.
Expand All @@ -50,7 +51,7 @@

Cosign signatures are stored as separate objects in the OCI registry, with only a weak
reference back to the object they "sign".
This means this relationship is opaque to the registry, and signatures *will not* be deleted

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or garbage-collected when the image is deleted.
Similarly, they **can** easily be copied from one environment to another, but this is not
automatic.
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This will replace the repo in the provided image:

```

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export COSIGN_REPOSITORY=gcr.io/my-new-repo
gcr.io/user-vmtest2/demo -> gcr.io/my-new-repo/demo:sha256-DIGEST.sig
```

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So the signature for `gcr.io/user-vmtest2/demo` will be stored in `gcr.io/my-new-repo/demo:sha256-DIGEST.sig`.
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