Envoy Proxy
Envoy Proxy is an edge and service proxy for Cloud computing-native applications.
Response flags
UH
: no healthy upstream hosts.UF
: upstream connection failure.UO
: upstream overflow.NR
: no route configured.URX
: rejected because of upstream retry limit or maximum connection attempts reached.
Additionally, for HTTP:
DC
: downstream connection termination.LH
: local service failed health check request.UT
: upstream request timeout.LR
: connection local reset.UR
: upstream remote reset.UC
: upstream connection termination.DI
: request processing was delayed for the specified period via fault injection.FI
: request was aborted with a specified response code via fault injection.RL
: request rate limited locally by the rate limiting filter.UAEX
: request was denied by the external authorisation service.RLSE
: request was rejected due to an error in the rate limit service.IH
: request was rejected with a 401 because it set an invalid value for a strictly-checked error.SI
: stream idle timeout, rejected with 408.DPE
: protocol error in downstream request.UPE
: protocol error un upstream response.UMSDR
: upstream request maximum stream duration reached.