Add support for multiple config files

[wperron]

Component(s)

collector

Is your feature request related to a problem? Please describe.

I want to define a basic set of configuration in the config block, but also allow for arbitrary configurations to be added via an additional configmap. In my case I'm deploying the operator as a Helm subchart and want users of my chart to be able to pass arbitrary blocks of configurations that I can't know ahead of time.

Describe the solution you'd like

I want to mount a configmap which contains additional configuration to be passed to controller, and then add a config: /path/to/additional-config.yaml arg that would be added to the container's args.

Currently this doesn't work because the operator ignores the config key from the args part of the spec.

Describe alternatives you've considered

No response

Additional context

No response

[jaronoff97]

@wperron we have a long standing open issue here #1906, for now, i would recommend checking out the opentelemetry-kube-stack chart which already does the merging via helm.

[jaronoff97]

If you have ideas on how you think the linked issue above should work, would love to hear any ideas. Thank you!