133 lines
4.5 KiB
Go
133 lines
4.5 KiB
Go
// Copyright © 2017 The virtual-kubelet authors
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package cmd
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import (
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"fmt"
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"log"
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"os"
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"path/filepath"
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"strings"
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homedir "github.com/mitchellh/go-homedir"
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"github.com/spf13/cobra"
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"github.com/spf13/viper"
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"github.com/virtual-kubelet/virtual-kubelet/providers"
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vkubelet "github.com/virtual-kubelet/virtual-kubelet/vkubelet"
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corev1 "k8s.io/api/core/v1"
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)
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var kubeletConfig string
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var kubeConfig string
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var kubeNamespace string
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var nodeName string
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var operatingSystem string
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var provider string
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var providerConfig string
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var taint string
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// RootCmd represents the base command when called without any subcommands
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var RootCmd = &cobra.Command{
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Use: "virtual-kubelet",
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Short: "virtual-kubelet provides a virtual kubelet interface for your kubernetes cluster.",
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Long: `virtual-kubelet implements the Kubelet interface with a pluggable
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backend implementation allowing users to create kubernetes nodes without running the kubelet.
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This allows users to schedule kubernetes workloads on nodes that aren't running Kubernetes.`,
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Run: func(cmd *cobra.Command, args []string) {
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fmt.Println(kubeConfig)
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f, err := vkubelet.New(nodeName, operatingSystem, kubeNamespace, kubeConfig, taint, provider, providerConfig)
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if err != nil {
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log.Fatal(err)
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}
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f.Run()
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},
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}
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// Execute adds all child commands to the root command and sets flags appropriately.
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// This is called by main.main(). It only needs to happen once to the rootCmd.
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func Execute() {
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if err := RootCmd.Execute(); err != nil {
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fmt.Println(err)
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os.Exit(1)
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}
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}
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func init() {
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cobra.OnInitialize(initConfig)
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// Here you will define your flags and configuration settings.
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// Cobra supports persistent flags, which, if defined here,
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// will be global for your application.
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//RootCmd.PersistentFlags().StringVar(&kubeletConfig, "config", "", "config file (default is $HOME/.virtual-kubelet.yaml)")
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RootCmd.PersistentFlags().StringVar(&kubeConfig, "kubeconfig", "", "config file (default is $HOME/.kube/config)")
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RootCmd.PersistentFlags().StringVar(&kubeNamespace, "namespace", "", "kubernetes namespace (default is 'all')")
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RootCmd.PersistentFlags().StringVar(&nodeName, "nodename", "virtual-kubelet", "kubernetes node name")
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RootCmd.PersistentFlags().StringVar(&operatingSystem, "os", "Linux", "Operating System (Linux/Windows)")
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RootCmd.PersistentFlags().StringVar(&provider, "provider", "", "cloud provider")
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RootCmd.PersistentFlags().StringVar(&taint, "taint", "", "apply taint to node, making scheduling explicit")
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RootCmd.PersistentFlags().StringVar(&providerConfig, "provider-config", "", "cloud provider configuration file")
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// Cobra also supports local flags, which will only run
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// when this action is called directly.
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// RootCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
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}
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// initConfig reads in config file and ENV variables if set.
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func initConfig() {
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if provider == "" {
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fmt.Println("You must supply a cloud provider option: use --provider")
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os.Exit(1)
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}
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// Find home directory.
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home, err := homedir.Dir()
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if err != nil {
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fmt.Println(err)
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os.Exit(1)
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}
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if kubeletConfig != "" {
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// Use config file from the flag.
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viper.SetConfigFile(kubeletConfig)
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} else {
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// Search config in home directory with name ".virtual-kubelet" (without extension).
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viper.AddConfigPath(home)
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viper.SetConfigName(".virtual-kubelet")
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}
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viper.AutomaticEnv() // read in environment variables that match
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// If a config file is found, read it in.
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if err := viper.ReadInConfig(); err == nil {
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fmt.Println("Using config file:", viper.ConfigFileUsed())
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}
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if kubeConfig == "" {
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kubeConfig = filepath.Join(home, ".kube", "config")
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}
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if kubeNamespace == "" {
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kubeNamespace = corev1.NamespaceAll
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}
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// Validate operating system.
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ok, _ := providers.ValidOperatingSystems[operatingSystem]
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if !ok {
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fmt.Printf("Operating system '%s' not supported. Valid options are %s\n", operatingSystem, strings.Join(providers.ValidOperatingSystems.Names(), " | "))
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os.Exit(1)
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}
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}
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