forked from rook/rook
120 lines
4.0 KiB
Go
120 lines
4.0 KiB
Go
/*
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Copyright 2019 The Rook Authors. All rights reserved.
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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 k8sutil
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import (
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"context"
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"fmt"
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"os"
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"sync"
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"time"
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"github.com/pkg/errors"
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v1 "k8s.io/api/core/v1"
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kerrors "k8s.io/apimachinery/pkg/api/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/client-go/kubernetes"
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)
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var loggedOperatorSettings = sync.Map{}
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// DeleteConfigMap deletes a ConfigMap.
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func DeleteConfigMap(ctx context.Context, clientset kubernetes.Interface, cmName, namespace string, opts *DeleteOptions) error {
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k8sOpts := BaseKubernetesDeleteOptions()
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delete := func() error { return clientset.CoreV1().ConfigMaps(namespace).Delete(ctx, cmName, *k8sOpts) }
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verify := func() error {
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_, err := clientset.CoreV1().ConfigMaps(namespace).Get(ctx, cmName, metav1.GetOptions{})
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return err
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}
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resource := fmt.Sprintf("ConfigMap %s", cmName)
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defaultWaitOptions := &WaitOptions{RetryCount: 20, RetryInterval: 2 * time.Second}
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return DeleteResource(delete, verify, resource, opts, defaultWaitOptions)
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}
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func CreateOrUpdateConfigMap(ctx context.Context, clientset kubernetes.Interface, cm *v1.ConfigMap) (*v1.ConfigMap, error) {
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name := cm.GetName()
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namespace := cm.GetNamespace()
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existingCm, err := clientset.CoreV1().ConfigMaps(namespace).Get(ctx, name, metav1.GetOptions{})
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if err != nil {
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if kerrors.IsNotFound(err) {
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cm, err := clientset.CoreV1().ConfigMaps(namespace).Create(ctx, cm, metav1.CreateOptions{})
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if err != nil {
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return nil, errors.Wrapf(err, "failed to create %q configmap", name)
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}
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return cm, nil
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}
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return nil, errors.Wrapf(err, "failed to retrieve %q configmap.", name)
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}
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existingCm.Data = cm.Data
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existingCm.OwnerReferences = cm.OwnerReferences
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if existingCm, err := clientset.CoreV1().ConfigMaps(namespace).Update(ctx, existingCm, metav1.UpdateOptions{}); err != nil {
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return nil, errors.Wrapf(err, "failed to update existing %q configmap", existingCm.Name)
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}
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return existingCm, nil
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}
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// GetOperatorSetting gets the operator setting from ConfigMap or Env Var
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// returns defaultValue if setting is not found
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func GetOperatorSetting(context context.Context, clientset kubernetes.Interface, configMapName, settingName, defaultValue string) (string, error) {
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// config must be in operator pod namespace
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namespace := os.Getenv(PodNamespaceEnvVar)
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cm, err := clientset.CoreV1().ConfigMaps(namespace).Get(context, configMapName, metav1.GetOptions{})
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if err != nil {
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if kerrors.IsNotFound(err) {
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if settingValue, ok := os.LookupEnv(settingName); ok {
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logger.Infof("%s=%q (env var)", settingName, settingValue)
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return settingValue, nil
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}
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logger.Infof("%s=%q (default)", settingName, defaultValue)
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return defaultValue, nil
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}
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return defaultValue, fmt.Errorf("error reading ConfigMap %q. %v", configMapName, err)
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}
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return GetValue(cm.Data, settingName, defaultValue), nil
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}
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func GetValue(data map[string]string, settingName, defaultValue string) string {
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settingValue := defaultValue
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settingSource := "default"
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if val, ok := data[settingName]; ok {
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settingValue = val
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settingSource = "configmap"
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} else if val, ok := os.LookupEnv(settingName); ok {
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settingValue = val
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settingSource = "env var"
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}
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if logChangedSettings(settingName, settingValue) {
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logger.Infof("%s=%q (%s)", settingName, settingValue, settingSource)
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}
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return settingValue
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}
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func logChangedSettings(settingName, settingValue string) bool {
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if val, ok := loggedOperatorSettings.Load(settingName); !ok || val != settingValue {
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loggedOperatorSettings.Store(settingName, settingValue)
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return true
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}
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return false
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}
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