Prometheus reporter always listen 9090 ignore config file.

[ev1lQuark]

Environment

• Server: Dubbo-go, main branch
• Client: Dubbo-go, main branch
• Protocol: Triple
• Registry: zk

Issue description

Metrics module starts reporter twice.

• dubbo-go/config/metric_config.go

  Line 71 in 10336a5

  extension.GetMetricReporter("prometheus", mc.ToReporterConfig())

• dubbo-go/filter/metrics/filter.go

  Line 77 in 10336a5

  reporters = append(reporters, extension.GetMetricReporter("prometheus", metrics.NewReporterConfig()))

The first time during config loading, Prometheus reporter tries to listening 9091 in expect. (9091 is set in config file)
The second time during filter init, Prometheus reporter tries to listen 9090 as the default value.

Logs

Click me to check logs

2023-07-19 14:58:16     WARN    prometheus/reporter.go:94       new prometheus reporter with error = listen tcp :9090: bind: Only one usage of each socket address (protocol/network address/port) is normally permitted.

Config File

Click me to check files

dubbo:
  application:
    version: 3.0.1
  metrics:
    enable: true # default is true
    path: /metrics # default is /metrics
    summary-max-age: 60000000000 # 1 minute, default is 10min
    port: 9091 # default is 9090
  registries:
    myzk:
      protocol: zookeeper
      address: localhost:2181
  protocols:
    triple:
      name: tri
      port: 20000
  logger:
    zap-config:
      level: debug
  provider:
    services:
      GreeterProvider:
        group: dubbo-go

[ev1lQuark]

Fixed by #2392