Upgrade \ Move RunCommandOnHost to using client-go api.

[Tatsinnit]

Currently this project uses the uitls function called RunCommandOnHost which runs kubectl command under the hood on various occasions using os.exec, this feature upgrade request work item is open to scope the work which is required to move away from this.

• API : https://github.com/kubernetes/client-go/#how-to-use-it

Key challenges:

Translating the kubectl to the exact command is something we need to figure out, translating the kubectl what we run from command prompt needs to be implemented via API, might be best approach will be to write a separate helper and start this by translating one collector which uses kubctl under the hood.

Some helpful link:

• https://kubernetes.io/blog/2018/01/introducing-client-go-version-6/
• How can I get kubectl describe node output by using API? kubernetes/kubernetes#52694

Thanks,

FYI : few co-maintainer and founders - cc: @arnaud-tincelin , @JunSun17 or anyone interested and reading this (Please feel free to add any solutions which you have in mind)