apisix/docs/en/latest/plugins/mqtt-proxy.md

---
title: mqtt-proxy
---

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## Summary

- [**Name**](#name)
- [**Attributes**](#attributes)
- [**How To Enable**](#how-to-enable)
- [**Delete Plugin**](#delete-plugin)

## Name

The plugin `mqtt-proxy` only works in stream model, it help you to dynamic load
balance by `client_id` of MQTT.

And this plugin both support MQTT protocol [3.1.*](http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/os/mqtt-v3.1.1-os.html) and [5.0](https://docs.oasis-open.org/mqtt/mqtt/v5.0/mqtt-v5.0.html).

## Attributes

| Name           | Type    | Requirement | Default | Valid | Description                                                                            |
| -------------- | ------- | ----------- | ------- | ----- | -------------------------------------------------------------------------------------- |
| protocol_name  | string  | required    |         |       | Name of protocol, should be `MQTT` in normal.                                          |
| protocol_level | integer | required    |         |       | Level of protocol, it should be `4` for MQTT `3.1.*`. it should be `5` for MQTT `5.0`. |
| upstream.host  | string  | required    |         |       | the IP or host of upstream, will forward current request to.                           |
| upstream.ip    | string  | deprecated  |         |       | Use "host" instead. IP address of upstream, will forward current request to.|
| upstream.port  | number  | required    |         |       | Port of upstream, will forward current request to.                                     |

## How To Enable

To enable this plugin, we need to enable the stream_proxy configuration in `conf/config.yaml` first.
For example, the following configuration represents listening on the 9100 TCP port.

```yaml
    ...
    router:
        http: 'radixtree_uri'
        ssl: 'radixtree_sni'
    stream_proxy:                 # TCP/UDP proxy
      tcp:                        # TCP proxy port list
        - 9100
    dns_resolver:
    ...
```

Then send the MQTT request to port 9100.

Creates a stream route, and enable plugin `mqtt-proxy`.

```shell
curl http://127.0.0.1:9080/apisix/admin/stream_routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
    "remote_addr": "127.0.0.1",
    "plugins": {
        "mqtt-proxy": {
            "protocol_name": "MQTT",
            "protocol_level": 4,
            "upstream": {
                "host": "127.0.0.1",
                "port": 1980
            }
        }
    }
}'
```

## Delete Plugin

```shell
$ curl http://127.0.0.1:2379/v2/keys/apisix/stream_routes/1 -X DELETE
```

The `mqtt-proxy` plugin has been deleted now.