# Deploy ERNIE-4.5-0.3B-Paddle in 10 Minutes

Before deployment, ensure your environment meets the following requirements:

- GPU Driver ≥ 535
- CUDA ≥ 12.3
- cuDNN ≥ 9.5
- Linux X86_64
- Python ≥ 3.10

This guide uses the lightweight ERNIE-4.5-0.3B-Paddle model for demonstration, which can be deployed on most hardware configurations. Docker deployment is recommended.

For more information about how to install FastDeploy, refer to the [installation document](installation/README.md).

## 1. Launch Service
After installing FastDeploy, execute the following command in the terminal to start the service. For the configuration method of the startup command, refer to [Parameter Description](../parameters.md)

```
export ENABLE_V1_KVCACHE_SCHEDULER=1
python -m fastdeploy.entrypoints.openai.api_server \
       --model baidu/ERNIE-4.5-0.3B-Paddle \
       --port 8180 \
       --metrics-port 8181 \
       --engine-worker-queue-port 8182 \
       --max-model-len 32768 \
       --max-num-seqs 32
```

> 💡 Note: In the path specified by ```--model```, if the subdirectory corresponding to the path does not exist in the current directory, it will try to query whether AIStudio has a preset model based on the specified model name (such as ```baidu/ERNIE-4.5-0.3B-Paddle```). If it exists, it will automatically start downloading. The default download path is: ```~/xx```. For instructions and configuration on automatic model download, see [Model Download](../supported_models.md).
```--max-model-len``` indicates the maximum number of tokens supported by the currently deployed service.
```--max-num-seqs``` indicates the maximum number of concurrent processing supported by the currently deployed service.

**Related Documents**
- [Service Deployment](../online_serving/README.md)
- [Service Monitoring](../online_serving/metrics.md)

## 2. Request the Service
After starting the service, the following output indicates successful initialization:

```shell
api_server.py[line:91] Launching metrics service at http://0.0.0.0:8181/metrics
api_server.py[line:94] Launching chat completion service at http://0.0.0.0:8180/v1/chat/completions
api_server.py[line:97] Launching completion service at http://0.0.0.0:8180/v1/completions
INFO:     Started server process [13909]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
INFO:     Uvicorn running on http://0.0.0.0:8180 (Press CTRL+C to quit)
```

### Health Check

Verify service status (HTTP 200 indicates success):

```shell
curl -i http://0.0.0.0:8180/health
```

### cURL Request

Send requests to the service with the following command:

```shell
curl -X POST "http://0.0.0.0:1822/v1/chat/completions" \
-H "Content-Type: application/json" \
-d '{
  "messages": [
    {"role": "user", "content": "Write me a poem about large language model."}
  ],
  "stream": true
}'
```

### Python Client (OpenAI-compatible API)

FastDeploy's API is OpenAI-compatible. You can also use Python for requests:

```python
import openai
host = "0.0.0.0"
port = "8180"
client = openai.Client(base_url=f"http://{host}:{port}/v1", api_key="null")

response = client.chat.completions.create(
    model="null",
    messages=[
        {"role": "system", "content": "I'm a helpful AI assistant."},
        {"role": "user", "content": "Write me a poem about large language model."},
    ],
    stream=True,
)
for chunk in response:
    if chunk.choices[0].delta:
        print(chunk.choices[0].delta.content, end='')
print('\n')
```