Add an interval setting to the k8sobjects preset

[agagniere]

Description

Allows setting an interval to the pull-mode entries of the k8s_objects receiver via the kubernetesObjects preset.

Currently we cannot use the preset if we want a non-default pull interval. And the default interval is 1h.

This PR adds a single setting:

presets:
  kubernetesObjects:
    enabled: true
    watch: true
    interval: 30s # <- instead of 1h

Authorship

• I, a human, wrote this pull request description myself.

[TylerHelmuth]

Blocking because we shouldn't expose component config in a preset. Instead we could support meaningful duration presets.

[TylerHelmuth]

We purposefully make the presets very very opinionated and we do not want to expose component config through them. In general presets should be all boolean configuration options.

The best way to achieve this same outcome while using the preset is to combine the preset with config:

presets:
  kubernetesObjects:
    enabled: true
config:
  receivers:
    k8sobjects:
      interval: 30m

[agagniere]

Good solution.
My previous attempt to set only certain values in the config and use presets at the same time resulted in the config getting overridden by the preset's config, which is why I had given up on it.
But in this case the field is unset by the preset, so it works nicely 👍

I'll just have to be on the lookout for when the chart will update the receiver name from k8sobjects to k8s_objects

[agagniere]

There is a way to customize this setting while also benefiting from the preset