docs: clarify opentelemetry plugin enablement

docs/en/latest/plugins/opentelemetry.md

@@ -36,11 +36,15 @@ The `opentelemetry` Plugin can be used to report tracing data according to the [
 
 The Plugin only supports binary-encoded [OTLP over HTTP](https://opentelemetry.io/docs/reference/specification/protocol/otlp/#otlphttp).
 
-## Configurations
+## Enable `opentelemetry` Plugin
+
+The `opentelemetry` Plugin is disabled by default. In `conf/config.yaml`, keep the complete list of Plugins used by your deployment and add `opentelemetry`. If you are starting from `conf/config.yaml.example`, uncomment the existing `opentelemetry` entry.
 
-By default, configurations of the Service name, tenant ID, collector, and batch span processor are pre-configured in [default configuration](https://github.com/apache/apisix/blob/master/apisix/cli/config.lua).
+Reload APISIX for the change to take effect.
 
-You can change this configuration of the Plugin through the endpoint `apisix/admin/plugin_metadata/opentelemetry` For example:
+## Configurations
+
+The `opentelemetry` Plugin reads its plugin-level settings from Plugin Metadata. Configure the metadata through the endpoint `/apisix/admin/plugin_metadata/opentelemetry`. For example:
 
 :::note
 You can fetch the `admin_key` from `config.yaml` and save to an environment variable with the following command:
@@ -110,18 +114,6 @@ apisix:
   tracing: true
 ```
 
-### Enable `opentelemetry` Plugin
-
-By default, the `opentelemetry` Plugin is disabled in APISIX. To enable, add the Plugin to your configuration file as such:
-
-```yaml title="config.yaml"
-plugins:
-  - ...
-  - opentelemetry
-```
-
-Reload APISIX for changes to take effect.
-
 ### Send Traces to OpenTelemetry
 
 The following example demonstrates how to trace requests to a Route and send traces to OpenTelemetry.

docs/zh/latest/plugins/opentelemetry.md

@@ -35,11 +35,15 @@ description: opentelemetry 插件可用于根据 OpenTelemetry 协议规范上
 
 `opentelemetry` 插件可用于根据 [OpenTelemetry Specification](https://opentelemetry.io/docs/reference/specification/) 协议规范上报 Traces 数据。该插件仅支持二进制编码的 OTLP over HTTP，即请求类型为 `application/x-protobuf` 的数据上报。
 
-## 配置
+## 启用 opentelemetry 插件
+
+`opentelemetry` 插件默认处于禁用状态。在 `conf/config.yaml` 中保留部署使用的完整插件列表，并添加 `opentelemetry`。如果以 `conf/config.yaml.example` 为基础配置 APISIX，请取消注释已有的 `opentelemetry` 条目。
+
+重新加载 APISIX 以使更改生效。
 
-默认情况下，服务名称、租户 ID、collector 和 batch span processor 的配置已预配置在[默认配置](https://github.com/apache/apisix/blob/master/apisix/cli/config.lua)中。
+## 配置
 
-你可以通过端点 `apisix/admin/plugin_metadata/opentelemetry` 更改插件的配置，例如：
+`opentelemetry` 插件从插件元数据中读取插件级配置。通过端点 `/apisix/admin/plugin_metadata/opentelemetry` 配置插件元数据，例如：
 
 :::note
 你可以从 `config.yaml` 中获取 `admin_key` 并存入环境变量：
@@ -109,18 +113,6 @@ apisix:
   tracing: true
 ```
 
-### 启用 opentelemetry 插件
-
-默认情况下，APISIX 中的 `opentelemetry` 插件是禁用的。要启用它，请将插件添加到配置文件中，如下所示：
-
-```yaml title="config.yaml"
-plugins:
-  - ...
-  - opentelemetry
-```
-
-重新加载 APISIX 以使更改生效。
-
 ### 将 Traces 上报到 OpenTelemetry
 
 以下示例展示了如何追踪对路由的请求并将 traces 发送到 OpenTelemetry。