Server Cowboy is not blacklisted

[oscarvesga]

Hello,

I am following this tutorial https://www.rabbitmq.com/prometheus.html and I don't get any error in its steps. But when I try to used the curl curl --verbose http://localhost:15672/api/metrics I get the next error.

* Hostname was NOT found in DNS cache
*   Trying ::1...
* connect to ::1 port 15672 failed: Connection refused
*   Trying 127.0.0.1...
* Connected to localhost (127.0.0.1) port 15672 (#0)
> GET /api/metrics HTTP/1.1
> User-Agent: curl/7.35.0
> Host: localhost:15672
> Accept: */*
>
< HTTP/1.1 500 Internal Server Error
* Server Cowboy is not blacklisted
< server: Cowboy
< date: Tue, 20 Aug 2019 18:54:56 GMT
< content-length: 0
<
* Connection #0 to host localhost left intact

Any help is grateful

Status of node 'rabbit@c3p-msgbroker01'
     [{rabbitmq_management,"RabbitMQ Management Console","3.6.14"},
      {rabbitmq_web_dispatch,"RabbitMQ Web Dispatcher","3.6.14"},
      {rabbitmq_management_agent,"RabbitMQ Management Agent","3.6.14"},
      {rabbit,"RabbitMQ","3.6.14"},
      {rabbit_common,
          "Modules shared by rabbitmq-server and rabbitmq-erlang-client",