how to support multiple nodes balance on MQTT proxy?

[ccwxl]

Issue description

mqtt 代理如何配置可以支持多节点负载均衡?

Environment

• apisix version (cmd: apisix version): 2.10.0
• OS (cmd: uname -a): macos
• OpenResty / Nginx version (cmd: nginx -V or openresty -V):
• etcd version, if have (cmd: run curl http://127.0.0.1:9090/v1/server_info to get the info from server-info API):
• apisix-dashboard version, if have:
• the plugin runner version, if the issue is about a plugin runner (cmd: depended on the kind of runner):
• luarocks version, if the issue is about installation (cmd: luarocks --version):

[ccwxl]

@juzhiyuan 有方法没?

[juzhiyuan]

I just took a look at https://github.com/apache/apisix/blob/master/apisix/stream/plugins/mqtt-proxy.lua#L31-L43 .

It only supports one node 🤔 need @tzssangglass's confirm.

[tzssangglass]

I'm not sure,a all I see in the test cases of MQTT plugin is single node in upstream, maybe you could configure multiple nodes in upstream to try it?

[tokers]

Currently, only one endpoint can be configured in the MQTT plugin, a feasible work around plan is add another indirect L4 proxy (we can just use the apisix itself), and let the MQTT proxy to the L4 proxy, configure an Upstream with multiple nodes in L4 proxy.

Of course, PR's welcome to extend the MQTT plugin.

[juzhiyuan]

Currently, only one endpoint can be configured in the MQTT plugin, a feasible work around plan is add another indirect L4 proxy (we can just use the apisix itself), and let the MQTT proxy to the L4 proxy, configure an Upstream with multiple nodes in L4 proxy.

Of course, PR's welcome to extend the MQTT plugin.

Thanks for your explanation!

[juzhiyuan]

Currently, only one endpoint can be configured in the MQTT plugin, a feasible work around plan is add another indirect L4 proxy (we can just use the apisix itself), and let the MQTT proxy to the L4 proxy, configure an Upstream with multiple nodes in L4 proxy.

Of course, PR's welcome to extend the MQTT plugin.

Thanks for your explanation!

[spacewander]

Solved by #5666