Invalid ProviderID error is malformed

[benmoss]

What steps did you take and what happened:
Have a provider write a ProviderID that doesn't match the form we describe in https://github.com/kubernetes-sigs/cluster-api/blob/master/controllers/noderefutil/providerid.go

See a confusing error in the logs:

controller.go:257] controller-runtime/controller "msg"="Reconciler error" "error"="providerID must be of the form \u003ccloudProvider\u003e://\u003coptional\u003e/\u003csegments\u003e/\u003cprovider id\u003e" "controller"="machine" "name"="bmo-md-1-6bf4fd585d-jfwbx" "namespace"="default"

What did you expect to happen:
I think we just want it to print out the error string verbatim, I don't know where the formatting strings are coming from.

Anything else you would like to add:
I remember fixing this in klog ages ago. Maybe we just need to bump that? kubernetes/klog#139

/kind bug

[vincepri]

/help
/good-first-issue
/milestone v0.4.0

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[enyinna1234]

I'd like to work on this.
/assign
/lifecycle active

[fabriziopandini]

/lifecycle active
/assign @enyinna1234

[enyinna1234]

@benmoss I'm not able to reproduce this. Can you please shed more light? What provider did you use? I can't find where the NewProviderID function gets called that involves json marshaling.

[vincepri]

/milestone v0.4.x