kubernetes ingresses not being observed by extension

[stokerjon]

Component(s)

extension/observer/k8sobserver

What happened?

Description

When using k8s_observer with receiver creator and setting observe_ingresses: true it would be expected that it would start to create recievers based off of ingresses available in the cluster.

having a quick look it looks like the code to enable observing ingresess is missing from extension/observer/k8sobserver/extension.go

Steps to Reproduce

create a colloctor with the provided config

Expected Result

receiver creator would create receivers for ingresses in the cluster

Actual Result

ingresses are not observed and receiver creator does nothing

Collector version

v1.15.0/v0.109.0

Environment information

Environment

OS: amazon linux
kubernetes: v1.30

OpenTelemetry Collector configuration

config:
    extensions:
      k8s_observer:
        auth_type: serviceAccount
        observe_pods: false
        observe_ingresses: true
    exporters:
      debug:
        verbosity: normal
        sampling_initial: 1
        sampling_thereafter: 1
    processors:
    receivers:
      receiver_creator:
        watch_observers:
          - k8s_observer
        receivers:
          httpcheck:
            rule: type == "k8s.ingress"
            config:
              config:
                targets:
                  - endpoint: "https://`host`/`path`"
                    method: GET
                collection_interval: 10s
    service:
      telemetry:
        logs:
          level: "DEBUG"
          development: true
          encoding: "json"
      extensions:
        - k8s_observer
      pipelines:
        metrics:
          exporters:
            - debug
          processors: []
          receivers:
            - receiver_creator

Log output

{"level":"info","ts":1726843193.1351163,"caller":"[email protected]/service.go:129","msg":"Setting up own telemetry..."}
{"level":"warn","ts":1726843193.1352572,"caller":"[email protected]/service.go:196","msg":"service::telemetry::metrics::address is being deprecated in favor of service::telemetry::metrics::readers","stacktrace":"go.opentelemetry.io/collector/service.logsAboutMeterProvider\n\tgo.opentelemetry.io/collector/[email protected]/service.go:196\ngo.opentelemetry.io/collector/service.New\n\tgo.opentelemetry.io/collector/[email protected]/service.go:143\ngo.opentelemetry.io/collector/otelcol.(*Collector).setupConfigurationComponents\n\tgo.opentelemetry.io/collector/[email protected]/collector.go:183\ngo.opentelemetry.io/collector/otelcol.(*Collector).Run\n\tgo.opentelemetry.io/collector/[email protected]/collector.go:282\ngo.opentelemetry.io/collector/otelcol.NewCommand.func1\n\tgo.opentelemetry.io/collector/[email protected]/command.go:36\ngithub.com/spf13/cobra.(*Command).execute\n\tgithub.com/spf13/[email protected]/command.go:985\ngithub.com/spf13/cobra.(*Command).ExecuteC\n\tgithub.com/spf13/[email protected]/command.go:1117\ngithub.com/spf13/cobra.(*Command).Execute\n\tgithub.com/spf13/[email protected]/command.go:1041\nmain.runInteractive\n\tgithub.com/open-telemetry/opentelemetry-collector-releases/contrib/main.go:49\nmain.run\n\tgithub.com/open-telemetry/opentelemetry-collector-releases/contrib/main_others.go:10\nmain.main\n\tgithub.com/open-telemetry/opentelemetry-collector-releases/contrib/main.go:42\nruntime.main\n\truntime/proc.go:272"}
{"level":"info","ts":1726843193.135332,"caller":"[email protected]/telemetry.go:98","msg":"Serving metrics","address":":8888","metrics level":"Normal"}
{"level":"info","ts":1726843193.1354373,"caller":"builders/builders.go:26","msg":"Development component. May change in the future.","kind":"exporter","data_type":"metrics","name":"debug"}
{"level":"debug","ts":1726843193.1357343,"caller":"builders/builders.go:24","msg":"Beta component. May change in the future.","kind":"receiver","name":"receiver_creator","data_type":"metrics"}
{"level":"debug","ts":1726843193.1357844,"caller":"builders/extension.go:48","msg":"Alpha component. May change in the future.","kind":"extension","name":"k8s_observer"}
{"level":"info","ts":1726843193.1560295,"caller":"[email protected]/service.go:213","msg":"Starting otelcol-contrib...","Version":"0.109.0","NumCPU":8}
{"level":"info","ts":1726843193.156081,"caller":"extensions/extensions.go:39","msg":"Starting extensions..."}
{"level":"info","ts":1726843193.1561005,"caller":"extensions/extensions.go:42","msg":"Extension is starting...","kind":"extension","name":"k8s_observer"}
{"level":"info","ts":1726843193.1561198,"caller":"extensions/extensions.go:59","msg":"Extension started.","kind":"extension","name":"k8s_observer"}
{"level":"info","ts":1726843193.1562421,"caller":"[email protected]/service.go:239","msg":"Everything is ready. Begin running and processing data."}

Additional context

No response

[github-actions]

Pinging code owners:

• extension/observer/k8sobserver: @rmfitzpatrick @dmitryax

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[bacherfl]

Hi @stokerjon I also just looked into this and seems you are right - the config for enabling the Ingress observation does not seem to be considered when creating the K8s resource informers - right now, only pods, nodes and services are observed. I'd be happy to work on a PR to fix that