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f963500c54
Currently, if a container removal has failed for some reason, any client waiting for removal (e.g. `docker run --rm`) is stuck, waiting for removal to succeed while it has failed already. For more details and the reproducer, please check https://github.com/moby/moby/issues/34945 This commit addresses that by allowing `ContainerWait()` with `container.WaitCondition == "removed"` argument to return an error in case of removal failure. The `ContainerWaitOKBody` stucture returned to a client is amended with a pointer to `struct Error`, containing an error message string, and the `Client.ContainerWait()` is modified to return the error, if any, to the client. Note that this feature is only available for API version >= 1.34. In order for the old clients to be unstuck, we just close the connection without writing anything -- this causes client's error. Now, docker-cli would need a separate commit to bump the API to 1.34 and to show an error returned, if any. [v2: recreate the waitRemove channel after closing] [v3: document; keep legacy behavior for older clients] [v4: convert Error from string to pointer to a struct] [v5: don't emulate old behavior, send empty response in error case] [v6: rename legacy* vars to include version suffix] Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>