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https://github.com/k3s-io/k3s.git
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95 lines
2.8 KiB
Go
95 lines
2.8 KiB
Go
// +build !providerless
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/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package azure
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import (
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"context"
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"fmt"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/klog"
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"sigs.k8s.io/yaml"
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)
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const (
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cloudConfigNamespace = "kube-system"
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cloudConfigKey = "cloud-config"
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cloudConfigSecretName = "azure-cloud-provider"
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)
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// The config type for Azure cloud provider secret. Supported values are:
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// * file : The values are read from local cloud-config file.
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// * secret : The values from secret would override all configures from local cloud-config file.
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// * merge : The values from secret would override only configurations that are explicitly set in the secret. This is the default value.
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type cloudConfigType string
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const (
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cloudConfigTypeFile cloudConfigType = "file"
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cloudConfigTypeSecret cloudConfigType = "secret"
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cloudConfigTypeMerge cloudConfigType = "merge"
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)
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// InitializeCloudFromSecret initializes Azure cloud provider from Kubernetes secret.
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func (az *Cloud) InitializeCloudFromSecret() {
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config, err := az.getConfigFromSecret()
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if err != nil {
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klog.Warningf("Failed to get cloud-config from secret: %v, skip initializing from secret", err)
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return
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}
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if config == nil {
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// Skip re-initialization if the config is not override.
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return
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}
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if err := az.InitializeCloudFromConfig(config, true); err != nil {
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klog.Errorf("Failed to initialize Azure cloud provider: %v", err)
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}
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}
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func (az *Cloud) getConfigFromSecret() (*Config, error) {
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// Read config from file and no override, return nil.
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if az.Config.CloudConfigType == cloudConfigTypeFile {
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return nil, nil
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}
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secret, err := az.kubeClient.CoreV1().Secrets(cloudConfigNamespace).Get(context.TODO(), cloudConfigSecretName, metav1.GetOptions{})
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if err != nil {
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return nil, fmt.Errorf("failed to get secret %s: %v", cloudConfigSecretName, err)
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}
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cloudConfigData, ok := secret.Data[cloudConfigKey]
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if !ok {
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return nil, fmt.Errorf("cloud-config is not set in the secret (%s)", cloudConfigSecretName)
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}
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config := Config{}
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if az.Config.CloudConfigType == "" || az.Config.CloudConfigType == cloudConfigTypeMerge {
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// Merge cloud config, set default value to existing config.
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config = az.Config
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}
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err = yaml.Unmarshal(cloudConfigData, &config)
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if err != nil {
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return nil, fmt.Errorf("failed to parse Azure cloud-config: %v", err)
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}
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return &config, nil
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}
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