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@@ -737,7 +737,8 @@ for the old option will be removed in a future release.
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**Disabled by default in Release: v26.0**
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**Target For Removal In Release: v27.0**
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**Removed in Release: v28.2**
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The image manifest [v2 schema 1](https://distribution.github.io/distribution/spec/deprecated-schema-v1/)
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and "Docker Image v1" formats were deprecated in favor of the
@@ -748,23 +749,17 @@ formats.
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These legacy formats should no longer be used, and users are recommended to
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update images to use current formats, or to upgrade to more current images.
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Starting with Docker v26.0, pulling these images is disabled by default, and
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produces an error when attempting to pull the image:
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support has been removed in v28.2. Attempting to pull a legacy image now
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produces an error:
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```console
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$ docker pull ubuntu:10.04
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Error response from daemon:
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[DEPRECATION NOTICE] Docker Image Format v1 and Docker Image manifest version 2, schema 1 support is disabled by default and will be removed in an upcoming release.
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Docker Image Format v1 and Docker Image manifest version 2, schema 1 support has been removed.
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Suggest the author of docker.io/library/ubuntu:10.04 to upgrade the image to the OCI Format or Docker Image manifest v2, schema 2.
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More information at https://docs.docker.com/go/deprecated-image-specs/
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```
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An environment variable (`DOCKER_ENABLE_DEPRECATED_PULL_SCHEMA_1_IMAGE`) is
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added in Docker v26.0 that allows re-enabling support for these image formats
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in the daemon. This environment variable must be set to a non-empty value in
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the daemon's environment (for example, through a [systemd override file](https://docs.docker.com/config/daemon/systemd/)).
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Support for the `DOCKER_ENABLE_DEPRECATED_PULL_SCHEMA_1_IMAGE` environment variable
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will be removed in Docker v27.0 after which this functionality is removed permanently.
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