error: metric have already been registered about apollo-prometheus-exporter HOT 2 CLOSED

Hello!

Yup, collectDefaultMetrics is called by apollo-prometheus-exporter but you can avoid errors by:

• disabling the default metrics:

  createPrometheusExporterPlugin({ 
    app,
    defaultMetrics: false
  });

• providing a prefix for the default metrics:

  createPrometheusExporterPlugin({ 
    app,
    defaultMetricsOptions: {
      prefix: 'example-prefix',
    }
  });

• using another registry:

  import { Registry } from 'prom-client';
  
  // ...
  
  createPrometheusExporterPlugin({ 
    app,
    register: new Registry()
  });

I think I should let this fail like it does currently but provide guidance about it in the readme.

from apollo-prometheus-exporter.

Hello!

Yup, collectDefaultMetrics is called by apollo-prometheus-exporter but you can avoid errors by:

* disabling the default metrics:
  ```ts
  createPrometheusExporterPlugin({ 
    app,
    defaultMetrics: false
  });
  ```

* providing a prefix for the default metrics:
  ```ts
  createPrometheusExporterPlugin({ 
    app,
    defaultMetricsOptions: {
      prefix: 'example-prefix',
    }
  });
  ```

* using another registry:
  ```ts
  import { Registry } from 'prom-client';
  
  // ...
  
  createPrometheusExporterPlugin({ 
    app,
    register: new Registry()
  });
  ```

I think I should let this fail like it does currently but provide guidance about it in the readme.

the solutions work.

Yes, more guidance is good. I will close the issue.

from apollo-prometheus-exporter.