vendor update for E2E framework

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/k8s.io/cloud-provider/plugins.go

@@ -0,0 +1,148 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package cloudprovider
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"sync"
+
+	"k8s.io/klog"
+)
+
+// Factory is a function that returns a cloudprovider.Interface.
+// The config parameter provides an io.Reader handler to the factory in
+// order to load specific configurations. If no configuration is provided
+// the parameter is nil.
+type Factory func(config io.Reader) (Interface, error)
+
+// All registered cloud providers.
+var (
+	providersMutex           sync.Mutex
+	providers                = make(map[string]Factory)
+	deprecatedCloudProviders = []struct {
+		name     string
+		external bool
+		detail   string
+	}{
+		{"aws", false, "The AWS provider is deprecated and will be removed in a future release"},
+		{"azure", false, "The Azure provider is deprecated and will be removed in a future release"},
+		{"cloudstack", false, "The CloudStack Controller project is no longer maintained."},
+		{"gce", false, "The GCE provider is deprecated and will be removed in a future release"},
+		{"openstack", true, "https://github.com/kubernetes/cloud-provider-openstack"},
+		{"ovirt", false, "The ovirt Controller project is no longer maintained."},
+		{"photon", false, "The Photon Controller project is no longer maintained."},
+		{"vsphere", false, "The vSphere provider is deprecated and will be removed in a future release"},
+	}
+)
+
+const externalCloudProvider = "external"
+
+// RegisterCloudProvider registers a cloudprovider.Factory by name.  This
+// is expected to happen during app startup.
+func RegisterCloudProvider(name string, cloud Factory) {
+	providersMutex.Lock()
+	defer providersMutex.Unlock()
+	if _, found := providers[name]; found {
+		klog.Fatalf("Cloud provider %q was registered twice", name)
+	}
+	klog.V(1).Infof("Registered cloud provider %q", name)
+	providers[name] = cloud
+}
+
+// IsCloudProvider returns true if name corresponds to an already registered
+// cloud provider.
+func IsCloudProvider(name string) bool {
+	providersMutex.Lock()
+	defer providersMutex.Unlock()
+	_, found := providers[name]
+	return found
+}
+
+// GetCloudProvider creates an instance of the named cloud provider, or nil if
+// the name is unknown.  The error return is only used if the named provider
+// was known but failed to initialize. The config parameter specifies the
+// io.Reader handler of the configuration file for the cloud provider, or nil
+// for no configuration.
+func GetCloudProvider(name string, config io.Reader) (Interface, error) {
+	providersMutex.Lock()
+	defer providersMutex.Unlock()
+	f, found := providers[name]
+	if !found {
+		return nil, nil
+	}
+	return f(config)
+}
+
+// Detects if the string is an external cloud provider
+func IsExternal(name string) bool {
+	return name == externalCloudProvider
+}
+
+// InitCloudProvider creates an instance of the named cloud provider.
+func InitCloudProvider(name string, configFilePath string) (Interface, error) {
+	var cloud Interface
+	var err error
+
+	if name == "" {
+		klog.Info("No cloud provider specified.")
+		return nil, nil
+	}
+
+	if IsExternal(name) {
+		klog.Info("External cloud provider specified")
+		return nil, nil
+	}
+
+	for _, provider := range deprecatedCloudProviders {
+		if provider.name == name {
+			detail := provider.detail
+			if provider.external {
+				detail = fmt.Sprintf("Please use 'external' cloud provider for %s: %s", name, provider.detail)
+			}
+			klog.Warningf("WARNING: %s built-in cloud provider is now deprecated. %s", name, detail)
+
+			break
+		}
+	}
+
+	if configFilePath != "" {
+		var config *os.File
+		config, err = os.Open(configFilePath)
+		if err != nil {
+			klog.Fatalf("Couldn't open cloud provider configuration %s: %#v",
+				configFilePath, err)
+		}
+
+		defer config.Close()
+		cloud, err = GetCloudProvider(name, config)
+	} else {
+		// Pass explicit nil so plugins can actually check for nil. See
+		// "Why is my nil error value not equal to nil?" in golang.org/doc/faq.
+		cloud, err = GetCloudProvider(name, nil)
+	}
+
+	if err != nil {
+		return nil, fmt.Errorf("could not init cloud provider %q: %v", name, err)
+	}
+	if cloud == nil {
+		return nil, fmt.Errorf("unknown cloud provider %q", name)
+	}
+
+	return cloud, nil
+}