[CI/Build] Auto-fix Markdown files (#12941)

examples/online_serving/opentelemetry/Otel.md

@@ -1,7 +1,8 @@
 # Setup OpenTelemetry POC
 
 1. Install OpenTelemetry packages:
-    ```
+
+    ```console
     pip install \
       'opentelemetry-sdk>=1.26.0,<1.27.0' \
       'opentelemetry-api>=1.26.0,<1.27.0' \
@@ -10,7 +11,8 @@
     ```
 
 1. Start Jaeger in a docker container:
-    ```
+
+    ```console
     # From: https://www.jaegertracing.io/docs/1.57/getting-started/
     docker run --rm --name jaeger \
         -e COLLECTOR_ZIPKIN_HOST_PORT=:9411 \
@@ -28,19 +30,23 @@
     ```
 
 1. In a new shell, export Jaeger IP:
-    ```
+
+    ```console
     export JAEGER_IP=$(docker inspect   --format '{{ .NetworkSettings.IPAddress }}' jaeger)
     export OTEL_EXPORTER_OTLP_TRACES_ENDPOINT=grpc://$JAEGER_IP:4317
     ```
+
     Then set vLLM's service name for OpenTelemetry, enable insecure connections to Jaeger and run vLLM:
-    ```
+
+    ```console
     export OTEL_SERVICE_NAME="vllm-server"
     export OTEL_EXPORTER_OTLP_TRACES_INSECURE=true
     vllm serve facebook/opt-125m --otlp-traces-endpoint="$OTEL_EXPORTER_OTLP_TRACES_ENDPOINT"
     ```
 
 1. In a new shell, send requests with trace context from a dummy client
-    ```
+
+    ```console
     export JAEGER_IP=$(docker inspect --format '{{ .NetworkSettings.IPAddress }}' jaeger)
     export OTEL_EXPORTER_OTLP_TRACES_ENDPOINT=grpc://$JAEGER_IP:4317
     export OTEL_EXPORTER_OTLP_TRACES_INSECURE=true
@@ -48,7 +54,7 @@
     python dummy_client.py
     ```
 
-1. Open Jaeger webui: http://localhost:16686/
+1. Open Jaeger webui: <http://localhost:16686/>
 
     In the search pane, select `vllm-server` service and hit `Find Traces`. You should get a list of traces, one for each request.
     ![Traces](https://i.imgur.com/GYHhFjo.png)
@@ -57,26 +63,32 @@
 ![Spans details](https://i.imgur.com/OPf6CBL.png)
 
 ## Exporter Protocol
+
 OpenTelemetry supports either `grpc` or `http/protobuf` as the transport protocol for trace data in the exporter.
 By default, `grpc` is used. To set `http/protobuf` as the protocol, configure the `OTEL_EXPORTER_OTLP_TRACES_PROTOCOL` environment variable as follows:
-```
+
+```console
 export OTEL_EXPORTER_OTLP_TRACES_PROTOCOL=http/protobuf
 export OTEL_EXPORTER_OTLP_TRACES_ENDPOINT=http://$JAEGER_IP:4318/v1/traces
 vllm serve facebook/opt-125m --otlp-traces-endpoint="$OTEL_EXPORTER_OTLP_TRACES_ENDPOINT"
 ```
 
 ## Instrumentation of FastAPI
+
 OpenTelemetry allows automatic instrumentation of FastAPI.
+
 1. Install the instrumentation library
-    ```
+
+    ```console
     pip install opentelemetry-instrumentation-fastapi
     ```
 
 1. Run vLLM with `opentelemetry-instrument`
-    ```
+
+    ```console
     opentelemetry-instrument vllm serve facebook/opt-125m
     ```
 
 1. Send a request to vLLM and find its trace in Jaeger. It should contain spans from FastAPI.
 
-![FastAPI Spans](https://i.imgur.com/hywvoOJ.png)
+![FastAPI Spans](https://i.imgur.com/hywvoOJ.png)