forked from rook/rook
Travis Nielsen
cd806c83ee
The operator settings can come either from the configmap, an env var, or a default value. Knowing where the setting is loaded from is an important detail to see in the log. Signed-off-by: Travis Nielsen <tnielsen@redhat.com>
69 lines
2.5 KiB
Go
69 lines
2.5 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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"fmt"
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"os"
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"time"
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apierrors "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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// DeleteConfigMap deletes a ConfigMap.
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func DeleteConfigMap(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(cmName, k8sOpts) }
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verify := func() error {
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_, err := clientset.CoreV1().ConfigMaps(namespace).Get(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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// 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(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(configMapName, metav1.GetOptions{})
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if err != nil {
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if apierrors.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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if settingValue, ok := cm.Data[settingName]; ok {
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logger.Infof("%s=%q (configmap)", settingName, settingValue)
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return settingValue, nil
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} else 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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