Is it possible to configure prometheus in a docker container to scrape a target on docker host?

Question

I would like to scrape a target on my docker host. I either get 404 or conection refused.

My question is pretty much the same as this one here:

But the accepted answer (host.docker.internal:XXXX) did not work for me :/

I am working on a Docker for Windows environment with linux container.

Can you ping `host.docker.internal` from within the docker container? — kolaente, Feb 24 '20 at 19:22
Good idea, I tested it and the ping works! But why does it not work then? :/ — famabenda, Feb 25 '20 at 10:28
Do you get the metrics when accessing `_system/metrics` or the endpoint you configured? — Mihai-Daniel Virna, Feb 25 '20 at 10:43
Yes, my metrics endpoint is available under: http://localhost:8080/actuator/metrics — famabenda, Feb 25 '20 at 10:56

score 2 · Accepted Answer · edited Jun 20 '20 at 09:12

2

Fixed it:

I missed to specify my actual metrics enpoint in prometheus.yaml

Then:

  - job_name: 'spring-exporter'
    static_configs:
      - targets: ['host.docker.internal:8080']

Now:

  - job_name: 'spring-exporter'
    metrics_path: '/actuator/prometheus'
    static_configs:
      - targets: ['host.docker.internal:8080']

edited Jun 20 '20 at 09:12

Community

answered Feb 25 '20 at 11:25

famabenda