layer: remove metadata store interface#36504
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thaJeztah merged 1 commit intoMar 10, 2018
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Layer metadata storage has not been implemented outside of the layer store and will be deprecated by containerd metadata storage. To prepare for this and freeze the current metadata storage, remove the exported interface and make it internal to the layer store. Signed-off-by: Derek McGowan <derek@mcgstyle.net>
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Layer metadata storage has not been implemented outside of the layer store and will be deprecated by containerd metadata storage. To prepare for this and freeze the current metadata storage, remove the exported interface and make it internal to the layer store.
Note: the original intent of exposing this interface was to make it possible in the future to use a transactional datastore rather than rely on keeping files on disk in sync. This ended up being achieved in containerd, which does not make use of this interface. This refactoring will also help in transitioning graph drivers to snapshotters by allowing shared functionality (e.g. diff, mount) to be pulled up into the layer store (without making confusing interface changes) before moving to containerd.