[GitHub] [pulsar] addisonj opened a new issue #4920: `/metrics` endpoint in proxy is behind authentication

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addisonj opened a new issue #4920: `/metrics` endpoint in proxy is behind authentication 
URL: https://github.com/apache/pulsar/issues/4920
 
 
   **Describe the bug**
   In 2.4.0, the `/metrics` endpoint in the proxy service requires authentication when the authentication is enabled. This is different from the broker, where `/metrics` can be fetched even if authentication is enabled.
   
   This isn't clear if this is intentional or not, with @sijie of the opinion that it likely wasn't intended.
   
   There may be some reasons to want to authenticate that endpoint, particularly if running pulsar over the open internet, but it would seem like it should be controlled via configuration with it optionally be unauthenticated like the broker is.
   
   **To Reproduce**
   1. Enable the proxy with token authentication
   2. `HTTP GET /metrics`
   3. See you get an unauthorized response
   
   **Expected behavior**
   I should be able to have no authentication or optionally disable authentication for the `/metrics` endpoint.
   
   

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