GetZoneByNodeName Panics on Azure Stack

[patrickdillon]

What happened:

When running on Azure stack, GetZoneByNodeName panics.

What you expected to happen:

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?:

Looks introduced by #7833. Azure Stack probably does not support these API versions.

        goroutine 208 [running]:
        k8s.io/apimachinery/pkg/util/runtime.logPanic({0x32c11b8, 0x4d31120}, {0x2882600, 0x4c2b360})
                /go/src/github.com/openshift/cloud-provider-azure/vendor/k8s.io/apimachinery/pkg/util/runtime/runtime.go:107 +0xbc
        k8s.io/apimachinery/pkg/util/runtime.handleCrash({0x32c11b8, 0x4d31120}, {0x2882600, 0x4c2b360}, {0x4d31120, 0x0, 0x43ca65?})
                /go/src/github.com/openshift/cloud-provider-azure/vendor/k8s.io/apimachinery/pkg/util/runtime/runtime.go:82 +0x5e
        k8s.io/apimachinery/pkg/util/runtime.HandleCrash({0x0, 0x0, 0xc000605c00?})
                /go/src/github.com/openshift/cloud-provider-azure/vendor/k8s.io/apimachinery/pkg/util/runtime/runtime.go:59 +0x108
        panic({0x2882600?, 0x4c2b360?})
                /usr/lib/golang/src/runtime/panic.go:785 +0x132
        sigs.k8s.io/cloud-provider-azure/pkg/provider.(*availabilitySet).GetZoneByNodeName(0xc000687e90, {0x32c1110?, 0x4d31120?}, {0xc000d2b440?, 0x2?})
                /go/src/github.com/openshift/cloud-provider-azure/pkg/provider/azure_standard.go:583 +0x71
        sigs.k8s.io/cloud-provider-azure/pkg/provider.(*Cloud).GetZone(0xc000499808, {0x32c1110, 0x4d31120})
                /go/src/github.com/openshift/cloud-provider-azure/pkg/provider/azure_zones.go:184 +0x2ff
        sigs.k8s.io/cloud-provider-azure/pkg/node.(*ARMNodeProvider).GetZone(0x27ed9c0?, {0x32c1110?, 0x4d31120?}, {0x0?, 0x0?})
                /go/src/github.com/openshift/cloud-provider-azure/pkg/node/nodearm.go:83 +0x25
        sigs.k8s.io/cloud-provider-azure/pkg/nodemanager.(*CloudNodeController).getZoneByName(0xc0006884a8?, {0x32c1110?, 0x4d31120?}, 0xc000956008)
                /go/src/github.com/openshift/cloud-provider-azure/pkg/nodemanager/nodemanager.go:638 +0x3d

Environment:

• Kubernetes version (use kubectl version):
• Cloud provider or hardware configuration:
• OS (e.g: cat /etc/os-release):
• Kernel (e.g. uname -a):
• Install tools:
• Network plugin and version (if this is a network-related bug):
• Others:

[patrickdillon]

updated with stake trace