Unnecessary write to root filesystem

[mattcary]

cmd/main.go:GetInfo writes to registrationProbePath, even when --mode=registration. But kubelet-registration-path refers to /var/lib/kubelet, which is not mounted into the registrar container in --mode=registration.

/assign @mattcary

[mauriciopoppe]

This is related to #309, I wrote some strategies there about how to make it work by making the --mode=kubelet-registration-info always return exit code 0 and removing all the other supporting code including the unnecessary write to the root fs.

[mattcary]

I think it is not correct to use --kubelet-registration-path in mode=registration, as it's a container local path and not actually /var/lib/kubelet. So we should be able to make that change immediately? Let me start a PR to be concrete about what I mean.

@jsafrane

[mauriciopoppe]

yes, we can do the changes for #309 immediately i.e. #309 (comment)

[mattcary]

Oh, I see what you mean. Thanks for clarifying. I'll do that.

[mauriciopoppe]

#316 implemented #315 (comment). With the new release the write no longer to the root filesystem no longer happens.