refactor and sanitize metadata az value also

pkg/openstack/instancesv2.go

@@ -20,15 +20,14 @@ import (
 	"context"
 	"fmt"
 	sysos "os"
-	"regexp"
-	"strings"
 
 	"github.com/gophercloud/gophercloud/v2"
 	"github.com/gophercloud/gophercloud/v2/openstack/compute/v2/servers"
 	v1 "k8s.io/api/core/v1"
 	cloudprovider "k8s.io/cloud-provider"
 	"k8s.io/cloud-provider-openstack/pkg/client"
 	"k8s.io/cloud-provider-openstack/pkg/metrics"
+	"k8s.io/cloud-provider-openstack/pkg/util"
 	"k8s.io/cloud-provider-openstack/pkg/util/errors"
 	"k8s.io/klog/v2"
 )
@@ -109,23 +108,6 @@ func (i *InstancesV2) InstanceShutdown(ctx context.Context, node *v1.Node) (bool
 	return false, nil
 }
 
-func sanitizeLabel(input string) (string, error) {
-	// Replace non-alphanumeric characters (except '-', '_', '.') with '-'
-	reg := regexp.MustCompile(`[^-a-zA-Z0-9_.]+`)
-	sanitized := reg.ReplaceAllString(input, "-")
-
-	// Ensure the label starts and ends with an alphanumeric character
-	sanitized = strings.Trim(sanitized, "-_.")
-
-	// Ensure the label is not longer than 63 characters
-	if len(sanitized) > 63 {
-		sanitized = sanitized[:63]
-	}
-
-	// Convert to lowercase
-	return strings.ToLower(sanitized), nil
-}
-
 // InstanceMetadata returns the instance's metadata.
 func (i *InstancesV2) InstanceMetadata(ctx context.Context, node *v1.Node) (*cloudprovider.InstanceMetadata, error) {
 	srv, err := i.getInstance(ctx, node)
@@ -152,7 +134,7 @@ func (i *InstancesV2) InstanceMetadata(ctx context.Context, node *v1.Node) (*clo
 		return nil, err
 	}
 
-	availabilityZone, err := sanitizeLabel(server.AvailabilityZone)
+	availabilityZone, err := util.SanitizeLabel(server.AvailabilityZone)
 	if err != nil {
 		return nil, err
 	}

pkg/util/metadata/metadata.go

@@ -306,7 +306,7 @@ func (m *metadataService) GetAvailabilityZone() (string, error) {
 	if err != nil {
 		return "", err
 	}
-	return md.AvailabilityZone, nil
+	return util.SanitizeLabel(md.AvailabilityZone)
 }
 
 func CheckMetadataSearchOrder(order string) error {

pkg/util/util.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"regexp"
 	"strings"
 	"time"
 
@@ -167,3 +168,20 @@ func GetAZFromTopology(topologyKey string, requirement *csi.TopologyRequirement)
 
 	return zone
 }
+
+func SanitizeLabel(input string) (string, error) {
+	// Replace non-alphanumeric characters (except '-', '_', '.') with '-'
+	reg := regexp.MustCompile(`[^-a-zA-Z0-9_.]+`)
+	sanitized := reg.ReplaceAllString(input, "-")
+
+	// Ensure the label starts and ends with an alphanumeric character
+	sanitized = strings.Trim(sanitized, "-_.")
+
+	// Ensure the label is not longer than 63 characters
+	if len(sanitized) > 63 {
+		sanitized = sanitized[:63]
+	}
+
+	// Convert to lowercase
+	return strings.ToLower(sanitized), nil
+}