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@vcaesar

/lgtm /assign @fisherxu

This PR looks great, maybe we can merge files and dirs as well?

> now we start a container and run cp cmd to accomplish copy files from container, maybe we can ref what docker cp does to accomplish this function: https://github.com/docker/cli/blob/14962747e4af2c992bca55008c27387cd2268620/cli/command/container/cp.go#L74 But...

> because now we haven't used dirs, we can remove dir parameter But if we merge dirs and files, it's our duty to check the passed in arguments whether it...

> no, if we want to copy a file, we just need `cp xxx xxx`, but if we want to copy a dir, we need to append a **_-r_** flag,...

/lgtm

Will this cause message loss?

The `metaManager` module calls sendToEdged in many places, and there is no retry. If the message is lost, will it have an impact?

Thanks for your patience in explaining. /lgtm