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Add method for retrieving a V1-compatible manifest for any manifest or manifest list

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This is used to serve older clients that don't support the V2 schema format
This commit is contained in:
Joseph Schorr 2018-11-13 10:40:57 +02:00
parent d77d383e46
commit 1b3daac3c3
7 changed files with 119 additions and 7 deletions
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8
image/docker/schema1.py
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@ -365,6 +365,14 @@ class DockerSchema1Manifest(ManifestInterface):
def generate_legacy_layers(self, images_map, lookup_config_fn):
return self.rewrite_invalid_image_ids(images_map)
def get_v1_compatible_manifest(self, namespace_name, repo_name, tag_name, lookup_fn):
""" Returns the manifest that is compatible with V1, by virtue of being `amd64` and `linux`.
If none, returns None.
"""
# Note: schema1 *technically* supports non-amd64 architectures, but in practice these were never
# used, so to ensure full backwards compatibility, we just always return the schema.
return self
def rewrite_invalid_image_ids(self, images_map):
"""
Rewrites Docker v1 image IDs and returns a generator of DockerV1Metadata.