public static TarsUpstream buildAliveTarsUpstream(final String upstreamUrl) {
        return TarsUpstream.builder().upstreamUrl(upstreamUrl).weight(DEFAULT_WEIGHT)
                .warmup(Constants.WARMUP_TIME)
                .timestamp(System.currentTimeMillis())
                .build();
    }
Build alive tars upstream tars upstream.

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