help request: Are there any examples of custom balancer?

[k359792067]

Description

I wrote a custom balancer like mqtt_custom.lua and placed it in the apisix/balancer directory, hoping to use it with mqtt-proxy plugin, but it didn't work. I see

user-defined load balancer loaded via require("apisix.balancer.your_balancer")

in the document, but the specifics are missing. Are there any relevant examples I can refer to?

1. PUT /apisix/admin/stream_routes/1

    "plugins": {
        "mqtt-proxy": {
            "protocol_name": "MQTT",
            "protocol_level": 4
        }
    },
    "upstream": {
        "type": "mqtt_custom",
        "nodes": [
            {
                "host": "192.168.x.x",
                "port": 1883,
                "weight": 1
            },
            {
                "host": "192.168.x.x",
                "port": 2883,
                "weight": 1
            }
        ]
    }
}

Environment

• APISIX version (run apisix version): 3.9.1 (docker-compose deployed)
• Operating system (run uname -a): Linux 59018549cd9d 6.1.21.2-microsoft-standard-WSL2+ change: added an example of plugin. #2 SMP Wed Dec 4 10:45:58 CST 2024 x86_64 GNU/Linux
• OpenResty / Nginx version (run openresty -V or nginx -V):nginx version: openresty/1.25.3.1