Support observability in dubbo 3.1.11

[leohao6762]

• I have searched the issues of this repository and believe that this is not a duplicate.

问题如下

• 我是目前使用dubbo3.1.11版本，由于南北向接口使用了resteasy，并做了一些定制化的开发，暂时无法升级到3.2.X；目前想做一些可观测性的指标集成到prometheus，这块有现成的东西吗；翻了一下官方文档也找不到资料

[songxiaosheng]

Currently not supported for lower versions. If upgrade is not possible, it is recommended to extend customization for monitoring buried points

[leohao6762]

我对dubbo源码不太熟悉，能不能给点实现思路

[songxiaosheng]

我对dubbo源码不太熟悉，能不能给点实现思路

What is your monitoring system? It can collect some key data for monitoring based on your monitoring,

[leohao6762]

Prometheus+Grafana;