mirror of
https://github.com/ceph/ceph-csi.git
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67 lines
1.7 KiB
Go
67 lines
1.7 KiB
Go
/*
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Copyright 2020 The CephCSI 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/LICENSE2.0
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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 k8s
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import (
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"fmt"
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"os"
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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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)
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var kubeclient *kubernetes.Clientset
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// NewK8sClient create kubernetes client.
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func NewK8sClient() (*kubernetes.Clientset, error) {
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if kubeclient != nil {
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return kubeclient, nil
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}
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var cfg *rest.Config
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var err error
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cPath := os.Getenv("KUBERNETES_CONFIG_PATH")
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if cPath != "" {
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cfg, err = clientcmd.BuildConfigFromFlags("", cPath)
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if err != nil {
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return nil, fmt.Errorf("failed to get cluster config from %q: %w", cPath, err)
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}
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} else {
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cfg, err = rest.InClusterConfig()
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if err != nil {
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return nil, fmt.Errorf("failed to get cluster config: %w", err)
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}
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}
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client, err := kubernetes.NewForConfig(cfg)
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if err != nil {
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return nil, fmt.Errorf("failed to create client: %w", err)
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}
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kubeclient = client
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return client, nil
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}
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// RunsOnKubernetes checks if the application is running within a Kubernetes cluster
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// by inspecting the presence of the KUBERNETES_SERVICE_HOST environment variable.
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func RunsOnKubernetes() bool {
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kubernetesServiceHost := os.Getenv("KUBERNETES_SERVICE_HOST")
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return kubernetesServiceHost != ""
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}
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