cloudproviders.go

Documentation: k8s.io/kubernetes/cmd/kube-controller-manager/app

     1  /*
     2  Copyright 2018 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package app
    18  
    19  import (
    20  	"fmt"
    21  
    22  	utilfeature "k8s.io/apiserver/pkg/util/feature"
    23  	"k8s.io/klog/v2"
    24  	"k8s.io/kubernetes/pkg/features"
    25  
    26  	"k8s.io/client-go/informers"
    27  	cloudprovider "k8s.io/cloud-provider"
    28  )
    29  
    30  // createCloudProvider helps consolidate what is needed for cloud providers, we explicitly list the things
    31  // that the cloud providers need as parameters, so we can control
    32  func createCloudProvider(logger klog.Logger, cloudProvider string, externalCloudVolumePlugin string, cloudConfigFile string,
    33  	allowUntaggedCloud bool, sharedInformers informers.SharedInformerFactory) (cloudprovider.Interface, ControllerLoopMode, error) {
    34  	var cloud cloudprovider.Interface
    35  	var loopMode ControllerLoopMode
    36  	var err error
    37  
    38  	if utilfeature.DefaultFeatureGate.Enabled(features.DisableCloudProviders) && cloudprovider.IsDeprecatedInternal(cloudProvider) {
    39  		cloudprovider.DisableWarningForProvider(cloudProvider)
    40  		return nil, ExternalLoops, fmt.Errorf(
    41  			"cloud provider %q was specified, but built-in cloud providers are disabled. Please set --cloud-provider=external and migrate to an external cloud provider",
    42  			cloudProvider)
    43  	}
    44  
    45  	if cloudprovider.IsExternal(cloudProvider) {
    46  		loopMode = ExternalLoops
    47  		if externalCloudVolumePlugin == "" {
    48  			// externalCloudVolumePlugin is temporary until we split all cloud providers out.
    49  			// So we just tell the caller that we need to run ExternalLoops without any cloud provider.
    50  			return nil, loopMode, nil
    51  		}
    52  		cloud, err = cloudprovider.InitCloudProvider(externalCloudVolumePlugin, cloudConfigFile)
    53  	} else {
    54  		cloudprovider.DeprecationWarningForProvider(cloudProvider)
    55  
    56  		loopMode = IncludeCloudLoops
    57  		cloud, err = cloudprovider.InitCloudProvider(cloudProvider, cloudConfigFile)
    58  	}
    59  	if err != nil {
    60  		return nil, loopMode, fmt.Errorf("cloud provider could not be initialized: %v", err)
    61  	}
    62  
    63  	if cloud != nil && !cloud.HasClusterID() {
    64  		if allowUntaggedCloud {
    65  			logger.Info("Warning: detected a cluster without a ClusterID.  A ClusterID will be required in the future.  Please tag your cluster to avoid any future issues")
    66  		} else {
    67  			return nil, loopMode, fmt.Errorf("no ClusterID Found.  A ClusterID is required for the cloud provider to function properly.  This check can be bypassed by setting the allow-untagged-cloud option")
    68  		}
    69  	}
    70  
    71  	if informerUserCloud, ok := cloud.(cloudprovider.InformerUser); ok {
    72  		informerUserCloud.SetInformers(sharedInformers)
    73  	}
    74  	return cloud, loopMode, err
    75  }
    76
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