add notes back

docs/en/latest/plugins/real-ip.md

@@ -45,10 +45,23 @@ The Plugin is functionally similar to NGINX's [ngx_http_realip_module](https://n
 | trusted_addresses | array[string] | False |     | array of IPv4 or IPv6 addresses (CIDR notation acceptable)  | Trusted addresses that are known to send correct replacement addresses. This configuration sets the [`set_real_ip_from`](https://nginx.org/en/docs/http/ngx_http_realip_module.html#set_real_ip_from) directive. |
 | recursive  | boolean | False |  False   |    | If false, replace the original client address that matches one of the trusted addresses by the last address sent in the configured `source`.<br>If true, replace the original client address that matches one of the trusted addresses by the last non-trusted address sent in the configured `source`. |
 
+:::note
+If the address specified in `source` is missing or invalid, the Plugin would not change the client address.
+:::
+
 ## Examples
 
 The examples below demonstrate how you can configure `real-ip` in different scenarios.
 
+:::note
+You can fetch the `admin_key` from `config.yaml` and save to an environment variable with the following command:
+
+```bash
+admin_key=$(yq '.deployment.admin.admin_key[0].key' conf/config.yaml | sed 's/"//g')
+```
+
+:::
+
 ### Obtain Real Client Address From URI Parameter
 
 The following example demonstrates how to update the client IP address with a URI parameter.

docs/zh/latest/plugins/real-ip.md

@@ -45,10 +45,23 @@ description: real-ip 插件允许 Apache APISIX 通过 HTTP 请求头或 HTTP 
 | trusted_addresses | array[string] | 否       |        | IPv4 或 IPv6 地址数组（接受 CIDR 表示法） | 已知会发送正确替代地址的可信地址。此配置设置 [`set_real_ip_from`](https://nginx.org/en/docs/http/ngx_http_realip_module.html#set_real_ip_from) 指令。 |
 | recursive         | boolean       | 否       | false  |                            | 如果为 false，则将匹配可信地址之一的原始客户端地址替换为配置的 `source` 中发送的最后一个地址。<br>如果为 true，则将匹配可信地址之一的原始客户端地址替换为配置的 `source` 中发送的最后一个非可信地址。 |
 
+:::note
+如果 `source` 属性中设置的地址丢失或者无效，该插件将不会更改客户端地址。
+:::
+
 ## 示例
 
 以下示例展示了如何在不同场景中配置 `real-ip`。
 
+:::note
+您可以这样从 `config.yaml` 中获取 `admin_key` 并存入环境变量：
+
+```bash
+admin_key=$(yq '.deployment.admin.admin_key[0].key' conf/config.yaml | sed 's/"//g')
+```
+
+:::
+
 ### 从 URI 参数获取真实客户端地址
 
 以下示例演示了如何使用 URI 参数更新客户端 IP 地址。