Also renames BlobSumService to V2MetadataService, BlobSum to
V2Metadata
Signed-off-by: Brian Bland <brian.bland@docker.com>
Upstream-commit: 63099477189ea14f3122f6aa37fa7c60d33562c7
Component: engine
Tracks source repository information for each blob in the blobsum
service, which is then used to attempt to mount blobs from another
repository when pushing instead of having to re-push blobs to the same
registry.
Signed-off-by: Brian Bland <brian.bland@docker.com>
Upstream-commit: 7289c7218e2101eb94fb90f2cb22e1412d016984
Component: engine
This commit adds a transfer manager which deduplicates and schedules
transfers, and also an upload manager and download manager that build on
top of the transfer manager to provide high-level interfaces for uploads
and downloads. The push and pull code is modified to use these building
blocks.
Some benefits of the changes:
- Simplification of push/pull code
- Pushes can upload layers concurrently
- Failed downloads and uploads are retried after backoff delays
- Cancellation is supported, but individual transfers will only be
cancelled if all pushes or pulls using them are cancelled.
- The distribution code is decoupled from Docker Engine packages and API
conventions (i.e. streamformatter), which will make it easier to split
out.
This commit also includes unit tests for the new distribution/xfer
package. The tests cover 87.8% of the statements in the package.
Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>
Upstream-commit: 572ce802306a4e919802e5b77cbeca94acda7c0a
Component: engine
