mirror of https://github.com/docker/compose.git
98 lines
2.5 KiB
Go
98 lines
2.5 KiB
Go
// +build kube
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/*
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Copyright 2020 Docker Compose CLI 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 resources
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import (
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"fmt"
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"os"
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"github.com/docker/compose-cli/api/context/store"
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"k8s.io/cli-runtime/pkg/genericclioptions"
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"k8s.io/client-go/tools/clientcmd"
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"k8s.io/client-go/tools/clientcmd/api"
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)
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// ListAvailableKubeConfigContexts list kube contexts
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func ListAvailableKubeConfigContexts(kubeconfig string) ([]string, error) {
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config, err := getKubeConfig(kubeconfig)
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if err != nil {
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return nil, err
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}
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contexts := []string{}
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for k := range config.Contexts {
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contexts = append(contexts, k)
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}
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return contexts, nil
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}
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// LoadConfig returns kubeconfig data referenced in the docker context
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func LoadConfig(ctx store.KubeContext) (*genericclioptions.ConfigFlags, error) {
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if ctx.FromEnvironment {
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return nil, nil
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}
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config, err := getKubeConfig(ctx.KubeconfigPath)
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if err != nil {
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return nil, err
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}
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contextName := ctx.ContextName
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if contextName == "" {
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contextName = config.CurrentContext
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}
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context, ok := config.Contexts[contextName]
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if !ok {
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return nil, fmt.Errorf("context name %s not found in kubeconfig", contextName)
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}
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cluster, ok := config.Clusters[context.Cluster]
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if !ok {
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return nil, fmt.Errorf("cluster %s not found for context %s", context.Cluster, contextName)
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}
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// bind to kubernetes config flags
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return &genericclioptions.ConfigFlags{
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Context: &ctx.ContextName,
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KubeConfig: &ctx.KubeconfigPath,
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Namespace: &context.Namespace,
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ClusterName: &context.Cluster,
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APIServer: &cluster.Server,
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CAFile: &cluster.CertificateAuthority,
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}, nil
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}
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func getKubeConfig(kubeconfig string) (*api.Config, error) {
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config, err := clientcmd.NewDefaultPathOptions().GetStartingConfig()
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if err != nil {
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return nil, err
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}
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if kubeconfig != "" {
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f, err := os.Stat(kubeconfig)
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if os.IsNotExist(err) {
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return nil, err
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}
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if f.IsDir() {
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return nil, fmt.Errorf("%s not a config file", kubeconfig)
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}
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config = clientcmd.GetConfigFromFileOrDie(kubeconfig)
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}
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return config, nil
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}
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