Modular system info polling from the sidecare linkerd container

[pngmafia]

Hey!
Assuming linkerd sidecar container has access to the main container’s system info,
I want to implement my own metrics polling system in the sidecar container and publish them to Prometheus. That way the main container wont get affected. This implementation on paper doesn’t seem to be tough task. Can someone please tell me how feasible this idea is and if so what are the pros and cons? One of the cons seems to be the security concern of main container exposing sys info.
Reasons to want to implement this change:

1. not satisfied with k8s pod metrics, want to have control over the collected metrics
2. While changes can be made to the k8s metrics APIs, taking the k8s updates to production takes a lot of time
3. updates in linkerd meanwhile could be taken to production relatively fast