Fix clouds.yaml authentication (#2927)

Signed-off-by: Justin Lamp <[email protected]>
Co-authored-by: Justin Lamp <[email protected]>

Author: k8s-infra-cherrypick-robot

pkg/kms/barbican/barbican.go

@@ -2,11 +2,13 @@ package barbican
 
 import (
 	"context"
+	"os"
 
 	"github.com/gophercloud/gophercloud/v2"
 	"github.com/gophercloud/gophercloud/v2/openstack"
 	"github.com/gophercloud/gophercloud/v2/openstack/keymanager/v1/secrets"
 	"k8s.io/cloud-provider-openstack/pkg/client"
+	"k8s.io/klog/v2"
 )
 
 type KMSOpts struct {
@@ -26,6 +28,17 @@ type Barbican struct {
 
 // NewBarbicanClient creates new BarbicanClient
 func NewBarbicanClient(cfg Config) (*gophercloud.ServiceClient, error) {
+	if cfg.Global.UseClouds {
+		if cfg.Global.CloudsFile != "" {
+			os.Setenv("OS_CLIENT_CONFIG_FILE", cfg.Global.CloudsFile)
+		}
+		if err := client.ReadClouds(&cfg.Global); err != nil {
+			return nil, err
+		}
+		klog.V(5).Infof("Config, loaded from the %s:", cfg.Global.CloudsFile)
+		client.LogCfg(cfg.Global)
+	}
+
 	provider, err := client.NewOpenStackClient(&cfg.Global, "barbican-kms-plugin")
 	if err != nil {
 		return nil, err