public static GrpcUpstream buildAliveGrpcUpstream(final String upstreamUrl) {
        return GrpcUpstream.builder().upstreamUrl(upstreamUrl).weight(50)
                .timestamp(System.currentTimeMillis()).build();
    }
Build alive grpc upstream.

@param upstreamUrl the upstreamUrl
@return the grpc upstream
shenyu-admin/src/main/java/org/apache/shenyu/admin/utils/CommonUpstreamUtils.java