Node name in cache could be empty

[nilo19]

What happened:

Node name in our cache could be empty for unknown reason.

cloud-provider-azure/pkg/provider/azure.go

Line 830 in 5450c2a

az.nodePrivateIPToNodeNameMap[address] = newNode.Name

In this case, we should assign a name for loadbalancerbackendaddress to prevent error. https://github.com/kubernetes-sigs/cloud-provider-azure/blob/master/pkg/provider/azure_loadbalancer_backendpool.go#L857

What you expected to happen:

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

Anything else we need to know?:

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: