upstream missing instance metadata

[hexiaofeng]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

upstream missing instance metadata

Expected Behavior

upstream carries instance metadata.
Extended label-based load balancing strategy

Steps To Reproduce

No response

Environment

ShenYu version(s):

Debug logs

No response

Anything else?

No response

[moremind]

which version? what sync factor？ pls fill the log