Merge pull request #51528 from yastij/azure-zone-byProviderID-nodeName

Automatic merge from submit-queue (batch tested with PRs 52047, 52063, 51528)

implementation of GetZoneByProviderID and GetZoneByNodeName for azure

This is part of the #50926 effort

cc @luxas 

**Release note**:

```release-note
None
```

pkg/cloudprovider/providers/azure/azure_zones.go

@@ -18,14 +18,16 @@ package azure
 
 import (
 	"encoding/json"
-	"errors"
 	"io"
 	"io/ioutil"
 	"net/http"
+	"strconv"
 	"sync"
 
 	"k8s.io/apimachinery/pkg/types"
 	"k8s.io/kubernetes/pkg/cloudprovider"
+
+	"github.com/Azure/azure-sdk-for-go/arm/compute"
 )
 
 const instanceInfoURL = "http://169.254.169.254/metadata/v1/InstanceInfo"
@@ -61,14 +63,31 @@ func (az *Cloud) GetZone() (cloudprovider.Zone, error) {
 // This is particularly useful in external cloud providers where the kubelet
 // does not initialize node data.
 func (az *Cloud) GetZoneByProviderID(providerID string) (cloudprovider.Zone, error) {
-	return cloudprovider.Zone{}, errors.New("GetZoneByProviderID not implemented")
+	nodeName, err := splitProviderID(providerID)
+	if err != nil {
+		return cloudprovider.Zone{}, err
+	}
+	return az.GetZoneByNodeName(nodeName)
 }
 
 // GetZoneByNodeName implements Zones.GetZoneByNodeName
 // This is particularly useful in external cloud providers where the kubelet
 // does not initialize node data.
 func (az *Cloud) GetZoneByNodeName(nodeName types.NodeName) (cloudprovider.Zone, error) {
-	return cloudprovider.Zone{}, errors.New("GetZoneByNodeName not imeplemented")
+
+	vm, err := az.VirtualMachinesClient.Get(az.ResourceGroup, string(nodeName), compute.InstanceView)
+
+	if err != nil {
+		return cloudprovider.Zone{}, err
+	}
+
+	failureDomain := strconv.Itoa(int(*vm.VirtualMachineProperties.InstanceView.PlatformFaultDomain))
+
+	zone := cloudprovider.Zone{
+		FailureDomain: failureDomain,
+		Region:        *(vm.Location),
+	}
+	return zone, nil
 }
 
 func fetchFaultDomain() (*string, error) {