membphis commented on a change in pull request #2279:
URL: https://github.com/apache/apisix/pull/2279#discussion_r495573065
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File path: doc/zh-cn/architecture-design.md
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@@ -273,6 +273,7 @@ APISIX 的 Upstream 除了基本的复杂均衡算法选择外，还支持对上
|checks |可选|配置健康检查的参数，详细可参考[health-check](../health-check.md)|
|retries |可选|使用底层的 Nginx 重试机制将请求传递给下一个上游，默认 APISIX
会启用重试机制，根据配置的后端节点个数设置重试次数，如果此参数显式被设置将会覆盖系统默认设置的重试次数。|
|enable_websocket|可选| 是否启用 `websocket`（布尔值），默认不启用|
+|labels |可选| 用于标识属性的键值对。 |
Review comment:
need more doc, we need an example about how to use this field.
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