GCE: autoscaler stuck in initializing status when virtual node is present

[mweibel]

See similar issues #2698 #2236

GceCloudProvider.NodeGroupForNode() does not handle empty Spec.Node.ProviderID and GceRefFromProviderId returns an error when given ProviderID is empty:
https://github.com/kubernetes/autoscaler/blob/master/cluster-autoscaler/cloudprovider/gce/gce_cloud_provider.go#L94

Similar to AzureCloudProvider.NodeGroupForNode() (and AWS' CloudProvider as well) the GceCloudProvider should ignore empty ProviderIDs.

I'd have a fix ready (mweibel@94749d1) but I wasn't able to follow testing instructions unfortunately.

A workaround is to provide a null providerID: gce://null/null/null - this seems to work, even though I'm not 100% sure which error logs would get produced by that (as in GKE you don't have access to the logs).

[mweibel]

feature request on google's issuetracker: https://issuetracker.google.com/issues/173130901

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[mweibel]

/remove-lifecycle stale

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/lifecycle stale

[mweibel]

/remove-lifecycle stale

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@k8s-triage-robot: Closing this issue.

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