91 lines
2.3 KiB
Go
91 lines
2.3 KiB
Go
/*
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Copyright 2023 The Dapr 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 kubernetes
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import (
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"os"
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"path/filepath"
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"strings"
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"k8s.io/client-go/kubernetes"
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"k8s.io/client-go/rest"
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"k8s.io/client-go/tools/clientcmd"
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"k8s.io/client-go/util/homedir"
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"github.com/dapr/kit/logger"
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)
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const (
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cliFlagName = "kubeconfig"
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envVarName = "KUBECONFIG"
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)
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var defaultKubeConfig string
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func init() {
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if home := homedir.HomeDir(); home != "" {
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defaultKubeConfig = filepath.Join(home, ".kube", "config")
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}
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}
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func GetKubeconfigPath(log logger.Logger, args []string) string {
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// Check if the path is set via the CLI flag `--kubeconfig`
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// This is deprecated but kept for backwards compatibility
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var cliVal string
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for i, a := range args {
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parts := strings.SplitN(a, "=", 2)
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if parts[0] == "-"+cliFlagName || parts[0] == "--"+cliFlagName {
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// Case: "--kubeconfig=val" or "-kubeconfig=val"
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if len(parts) == 2 {
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cliVal = parts[1]
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break
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} else if len(args) > (i+1) && !strings.HasPrefix(args[i+1], "-") {
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// Case: "--kubeconfig val" or "-kubeconfig val"
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cliVal = args[i+1]
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break
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}
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}
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}
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if cliVal != "" {
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log.Warnf("Setting kubeconfig using the CLI flag '--%s' is deprecated and will be removed in a future version", cliFlagName)
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return cliVal
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}
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// Check if we have the KUBECONFIG env var
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envVal := os.Getenv(envVarName)
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if envVal != "" {
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return envVal
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}
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// Return the default value
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return defaultKubeConfig
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}
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// GetKubeClient returns a kubernetes client.
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func GetKubeClient(kubeconfig string) (*kubernetes.Clientset, error) {
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conf, err := rest.InClusterConfig()
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if err != nil {
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conf, err = clientcmd.BuildConfigFromFlags("", kubeconfig)
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if err != nil {
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return nil, err
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}
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}
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clientset, err := kubernetes.NewForConfig(conf)
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if err != nil {
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return nil, err
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}
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return clientset, nil
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}
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