open-telemetry receiver/dockerstats endpoint not accessable

[newbie2devops (Learning Work)]

I’m new to docker and open-telemetry.

My system-configuration:

• Windows 11
• Docker Desktop on HyperV

My settings:

Docker Destkop / Docker Engine

"metrics-addr": "0.0.0.0:9323",   #also test 127.0.0.1
"experimental": true,

otel-config

  docker_stats:
    # endpoint: http://127.17.0.1:9323/metrics                       #not working
    endpoint: http://127.0.0.1:9323/metrics                            #not working    
    # endpoint: http://host.docker.internal:9323/metrics       #not working
    # endpoint: http://ip_of_my_physical_host:9323/metrics  #not working
    # endpoint: unix:///var/run/docker.sock  # works on a linux srv

Docker Compose

  otel-collector:
    image: otel/opentelemetry-collector-contrib
   :
    network_mode: host                                  #not working
#    extra_hosts:
#      - "host.docker.internal:host-gateway"  #not working

Now if I go to my browser and goto

• http://localhost:9323/metrics

• http://127.0.0.1:9323/metrics

• http://ip_of_my_physical_host:9323/metrics

it shows me the metrics.

But I get error messages from otel-collector :

cannot start pipelines: failed to start "docker_stats" receiver: error during connect: 
...
dial tcp: lookup 127.0.0.1:9323/metrics: no such host 

Setup a test-env with alpine

   :
    network_mode: host 

and I could get metrics within the alpine container, done curl and wget. Means I could reached out to the URLs.

Do you know what is missing/wrong in my (docker) settings?

I try to get metrics of my Desktop Engine with open-telemetry contrib: receiver/dockerstats.

[newbie2devops (Learning Work)]

Solve. In Windows Docker Desktop I expose the demon.

Like in docu (opentelemetry-collector-contrib/receiver/dockerstatsreceiver at main · open-telemetry/opentelemetry-collector-contrib) –> unix//var/run/docker.socks

With this approach it doesn’t work, container could not access “metrics-addr“
Collect Docker metrics with Prometheus | Docker Docs