server misbehaving

[gldhnchn]

Prometheus is reporting me:

Get "http://nginx_exporter:9113/metrics": dial tcp: lookup nginx_exporter on 127.0.0.11:53: server misbehaving

The stub status is delivered by the nginx config file:

server {
    listen 127.0.0.1:8085;
    server_name _;
    location /status {
        stub_status;
    }
}

Which is giving the output:

$ curl 127.0.0.1:8085/status
Active connections: 26 
server accepts handled requests
 2526 2526 4586 
Reading: 0 Writing: 13 Waiting: 13

The exporter is started in the same docker-compose.yaml like my prometheus instance with the following config:

  nginx_exporter:
    image: nginx/nginx-prometheus-exporter
    container_name: nginx_exporter
    network_mode: "host"
    command: "-nginx.scrape-uri=http://127.0.0.1:8085/status"
    restart: unless-stopped

The exporter is giving me the output:

$ curl 127.0.0.1:9113/metrics
# HELP nginx_connections_accepted Accepted client connections
# TYPE nginx_connections_accepted counter
nginx_connections_accepted 2615
# HELP nginx_connections_active Active client connections
# TYPE nginx_connections_active gauge
nginx_connections_active 26
# HELP nginx_connections_handled Handled client connections
# TYPE nginx_connections_handled counter
nginx_connections_handled 2615
# HELP nginx_connections_reading Connections where NGINX is reading the request header
# TYPE nginx_connections_reading gauge
nginx_connections_reading 0
# HELP nginx_connections_waiting Idle client connections
# TYPE nginx_connections_waiting gauge
nginx_connections_waiting 11
# HELP nginx_connections_writing Connections where NGINX is writing the response back to the client
# TYPE nginx_connections_writing gauge
nginx_connections_writing 15
# HELP nginx_http_requests_total Total http requests
# TYPE nginx_http_requests_total counter
nginx_http_requests_total 4743
# HELP nginx_up Status of the last metric scrape
# TYPE nginx_up gauge
nginx_up 1
# HELP nginxexporter_build_info Exporter build information
# TYPE nginxexporter_build_info gauge
nginxexporter_build_info{arch="linux/amd64",commit="e4a6810d4f0b776f7fde37fea1d84e4c7284b72a",date="2022-09-07T21:09:51Z",dirty="false",go="go1.19",version="0.11.0"} 1

I thought with this output, that it should be working, but prometheus is giving me the error from above.

The target in prometheus.yml is defined as

  - job_name: "nginx_metrics"
    scrape_interval: 15s
    scrape_timeout: 5s
    static_configs:
      - targets: ['nginx_exporter:9113']

Does somebody have an idea, what could be wrong here?

environment

$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 22.04.3 LTS
Release:	22.04
Codename:	jammy
$ nginx -v
nginx version: nginx/1.18.0 (Ubuntu)
$ docker -v
Docker version 24.0.5, build 24.0.5-0ubuntu1~22.04.1

prometheus version:

[gldhnchn]

Okay, looks like it is a network misconfiguration in my docker compose. So this is not a issue of the nginx exporter. I found a "solution" with a static ip. I'll have to figure it out. Thanks anyway!