implement InstanceShutdownByProviderID for azure

pkg/cloudprovider/providers/azure/azure_fakes.go

@@ -893,3 +893,7 @@ func (f *fakeVMSet) DetachDiskByName(diskName, diskURI string, nodeName types.No
 func (f *fakeVMSet) GetDataDisks(nodeName types.NodeName) ([]compute.DataDisk, error) {
 	return nil, fmt.Errorf("unimplemented")
 }
+
+func (f *fakeVMSet) GetProvisioningStateByNodeName(name string) (string, error) {
+	return "", fmt.Errorf("unimplemented")
+}

pkg/cloudprovider/providers/azure/azure_instances.go

@@ -121,7 +121,17 @@ func (az *Cloud) InstanceExistsByProviderID(ctx context.Context, providerID stri
 
 // InstanceShutdownByProviderID returns true if the instance is in safe state to detach volumes
 func (az *Cloud) InstanceShutdownByProviderID(ctx context.Context, providerID string) (bool, error) {
-	return false, cloudprovider.NotImplemented
+	nodeName, err := az.vmSet.GetNodeNameByProviderID(providerID)
+	if err != nil {
+		return false, err
+	}
+
+	provisioningState, err := az.vmSet.GetProvisioningStateByNodeName(string(nodeName))
+	if err != nil {
+		return false, err
+	}
+
+	return strings.ToLower(provisioningState) == "stopped" || strings.ToLower(provisioningState) == "deallocated", nil
 }
 
 // getComputeMetadata gets compute information from instance metadata.

pkg/cloudprovider/providers/azure/azure_standard.go

@@ -346,6 +346,15 @@ func (as *availabilitySet) GetInstanceIDByNodeName(name string) (string, error)
 	return *machine.ID, nil
 }
 
+func (as *availabilitySet) GetProvisioningStateByNodeName(name string) (provisioningState string, err error) {
+	vm, err := as.getVirtualMachine(types.NodeName(name))
+	if err != nil {
+		return provisioningState, err
+	}
+
+	return *vm.ProvisioningState, nil
+}
+
 // GetNodeNameByProviderID gets the node name by provider ID.
 func (as *availabilitySet) GetNodeNameByProviderID(providerID string) (types.NodeName, error) {
 	// NodeName is part of providerID for standard instances.

pkg/cloudprovider/providers/azure/azure_vmsets.go

@@ -64,4 +64,7 @@ type VMSet interface {
 	DetachDiskByName(diskName, diskURI string, nodeName types.NodeName) error
 	// GetDataDisks gets a list of data disks attached to the node.
 	GetDataDisks(nodeName types.NodeName) ([]compute.DataDisk, error)
+
+	// GetProvisioningStateByNodeName gets the provisioning state by node name.
+	GetProvisioningStateByNodeName(name string) (string, error)
 }

pkg/cloudprovider/providers/azure/azure_vmss.go

@@ -128,6 +128,15 @@ func (ss *scaleSet) getVmssVM(nodeName string) (ssName, instanceID string, vm co
 	return ssName, instanceID, *(cachedVM.(*compute.VirtualMachineScaleSetVM)), nil
 }
 
+func (ss *scaleSet) GetProvisioningStateByNodeName(name string) (provisioningState string, err error) {
+	_, _, vm, err := ss.getVmssVM(name)
+	if err != nil {
+		return provisioningState, err
+	}
+
+	return *vm.ProvisioningState, nil
+}
+
 // getCachedVirtualMachineByInstanceID gets scaleSetVMInfo from cache.
 // The node must belong to one of scale sets.
 func (ss *scaleSet) getVmssVMByInstanceID(resourceGroup, scaleSetName, instanceID string) (vm compute.VirtualMachineScaleSetVM, err error) {