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/*
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Copyright © 2020-2021 The k3d Author(s)
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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package cmd
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import (
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"context"
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"strings"
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"github.com/spf13/cobra"
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"gopkg.in/yaml.v2"
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"github.com/rancher/k3d/v5/cmd/cluster"
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cfg "github.com/rancher/k3d/v5/cmd/config"
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"github.com/rancher/k3d/v5/cmd/debug"
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"github.com/rancher/k3d/v5/cmd/image"
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"github.com/rancher/k3d/v5/cmd/kubeconfig"
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"github.com/rancher/k3d/v5/cmd/node"
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"github.com/rancher/k3d/v5/cmd/registry"
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cliutil "github.com/rancher/k3d/v5/cmd/util"
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l "github.com/rancher/k3d/v5/pkg/logger"
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"github.com/rancher/k3d/v5/pkg/runtimes"
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"github.com/rancher/k3d/v5/version"
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"github.com/sirupsen/logrus"
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"github.com/sirupsen/logrus/hooks/writer"
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)
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// RootFlags describes a struct that holds flags that can be set on root level of the command
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type RootFlags struct {
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debugLogging bool
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traceLogging bool
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timestampedLogging bool
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version bool
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}
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var flags = RootFlags{}
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func NewCmdK3d() *cobra.Command {
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// rootCmd represents the base command when called without any subcommands
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rootCmd := &cobra.Command{
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Use: "k3d",
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Short: "https://k3d.io/ -> Run k3s in Docker!",
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Long: `https://k3d.io/
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k3d is a wrapper CLI that helps you to easily create k3s clusters inside docker.
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Nodes of a k3d cluster are docker containers running a k3s image.
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All Nodes of a k3d cluster are part of the same docker network.`,
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Run: func(cmd *cobra.Command, args []string) {
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if flags.version {
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printVersion()
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} else {
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if err := cmd.Usage(); err != nil {
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l.Log().Fatalln(err)
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}
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}
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},
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}
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rootCmd.PersistentFlags().BoolVar(&flags.debugLogging, "verbose", false, "Enable verbose output (debug logging)")
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rootCmd.PersistentFlags().BoolVar(&flags.traceLogging, "trace", false, "Enable super verbose output (trace logging)")
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rootCmd.PersistentFlags().BoolVar(&flags.timestampedLogging, "timestamps", false, "Enable Log timestamps")
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// add local flags
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rootCmd.Flags().BoolVar(&flags.version, "version", false, "Show k3d and default k3s version")
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// add subcommands
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rootCmd.AddCommand(NewCmdCompletion(rootCmd))
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rootCmd.AddCommand(cluster.NewCmdCluster())
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rootCmd.AddCommand(kubeconfig.NewCmdKubeconfig())
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rootCmd.AddCommand(node.NewCmdNode())
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rootCmd.AddCommand(image.NewCmdImage())
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rootCmd.AddCommand(cfg.NewCmdConfig())
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rootCmd.AddCommand(registry.NewCmdRegistry())
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rootCmd.AddCommand(debug.NewCmdDebug())
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rootCmd.AddCommand(&cobra.Command{
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Use: "version",
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Short: "Show k3d and default k3s version",
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Long: "Show k3d and default k3s version",
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Run: func(cmd *cobra.Command, args []string) {
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printVersion()
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},
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})
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rootCmd.AddCommand(&cobra.Command{
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Use: "runtime-info",
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Short: "Show runtime information",
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Long: "Show some information about the runtime environment (e.g. docker info)",
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Run: func(cmd *cobra.Command, args []string) {
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info, err := runtimes.SelectedRuntime.Info()
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if err != nil {
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l.Log().Fatalln(err)
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}
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err = yaml.NewEncoder(os.Stdout).Encode(info)
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if err != nil {
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l.Log().Fatalln(err)
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}
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},
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Hidden: true,
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})
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// Init
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cobra.OnInitialize(initLogging, initRuntime)
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return rootCmd
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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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cmd := NewCmdK3d()
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if len(os.Args) > 1 {
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parts := os.Args[1:]
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// Check if it's a built-in command, else try to execute it as a plugin
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if _, _, err := cmd.Find(parts); err != nil {
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pluginFound, err := cliutil.HandlePlugin(context.Background(), parts)
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if err != nil {
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l.Log().Errorf("Failed to execute plugin '%+v'", parts)
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l.Log().Fatalln(err)
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} else if pluginFound {
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os.Exit(0)
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}
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}
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}
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if err := cmd.Execute(); err != nil {
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l.Log().Fatalln(err)
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}
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}
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// initLogging initializes the logger
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func initLogging() {
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if flags.traceLogging {
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l.Log().SetLevel(logrus.TraceLevel)
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} else if flags.debugLogging {
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l.Log().SetLevel(logrus.DebugLevel)
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} else {
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switch logLevel := strings.ToUpper(os.Getenv("LOG_LEVEL")); logLevel {
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case "TRACE":
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l.Log().SetLevel(logrus.TraceLevel)
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case "DEBUG":
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l.Log().SetLevel(logrus.DebugLevel)
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case "WARN":
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l.Log().SetLevel(logrus.WarnLevel)
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case "ERROR":
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l.Log().SetLevel(logrus.ErrorLevel)
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default:
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l.Log().SetLevel(logrus.InfoLevel)
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}
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}
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l.Log().SetOutput(ioutil.Discard)
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l.Log().AddHook(&writer.Hook{
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Writer: os.Stderr,
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LogLevels: []logrus.Level{
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logrus.PanicLevel,
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logrus.FatalLevel,
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logrus.ErrorLevel,
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logrus.WarnLevel,
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},
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})
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l.Log().AddHook(&writer.Hook{
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Writer: os.Stdout,
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LogLevels: []logrus.Level{
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logrus.InfoLevel,
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logrus.DebugLevel,
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logrus.TraceLevel,
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},
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})
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formatter := &logrus.TextFormatter{
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ForceColors: true,
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}
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if flags.timestampedLogging || os.Getenv("LOG_TIMESTAMPS") != "" {
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formatter.FullTimestamp = true
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}
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l.Log().SetFormatter(formatter)
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}
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func initRuntime() {
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runtime, err := runtimes.GetRuntime("docker")
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if err != nil {
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l.Log().Fatalln(err)
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}
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runtimes.SelectedRuntime = runtime
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if rtinfo, err := runtime.Info(); err == nil {
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l.Log().Debugf("Runtime Info:\n%+v", rtinfo)
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}
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}
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func printVersion() {
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fmt.Printf("k3d version %s\n", version.GetVersion())
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fmt.Printf("k3s version %s (default)\n", version.K3sVersion)
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}
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// NewCmdCompletion creates a new completion command
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func NewCmdCompletion(rootCmd *cobra.Command) *cobra.Command {
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completionFunctions := map[string]func(io.Writer) error{
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"bash": rootCmd.GenBashCompletion,
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"zsh": func(writer io.Writer) error {
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if err := rootCmd.GenZshCompletion(writer); err != nil {
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return err
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}
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fmt.Fprintf(writer, "\n# source completion file\ncompdef _k3d k3d\n")
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return nil
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},
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"psh": rootCmd.GenPowerShellCompletion,
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"powershell": rootCmd.GenPowerShellCompletionWithDesc,
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"fish": func(writer io.Writer) error {
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return rootCmd.GenFishCompletion(writer, true)
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},
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}
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// create new cobra command
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cmd := &cobra.Command{
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Use: "completion SHELL",
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Short: "Generate completion scripts for [bash, zsh, fish, powershell | psh]",
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Long: `To load completions:
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Bash:
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$ source <(k3d completion bash)
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# To load completions for each session, execute once:
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# Linux:
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$ k3d completion bash > /etc/bash_completion.d/k3d
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# macOS:
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$ k3d completion bash > /usr/local/etc/bash_completion.d/k3d
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Zsh:
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# If shell completion is not already enabled in your environment,
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# you will need to enable it. You can execute the following once:
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$ echo "autoload -U compinit; compinit" >> ~/.zshrc
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# To load completions for each session, execute once:
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$ k3d completion zsh > "${fpath[1]}/k3d"
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# You will need to start a new shell for this setup to take effect.
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fish:
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$ k3d completion fish | source
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# To load completions for each session, execute once:
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$ k3d completion fish > ~/.config/fish/completions/k3d.fish
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PowerShell:
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PS> k3d completion powershell | Out-String | Invoke-Expression
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# To load completions for every new session, run:
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PS> k3d completion powershell > k3d.ps1
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# and source this file from your PowerShell profile.
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`,
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ValidArgs: []string{"bash", "zsh", "fish", "powershell"},
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ArgAliases: []string{"psh"},
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DisableFlagsInUseLine: true,
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Args: cobra.ExactValidArgs(1),
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Run: func(cmd *cobra.Command, args []string) {
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if completionFunc, ok := completionFunctions[args[0]]; ok {
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if err := completionFunc(os.Stdout); err != nil {
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l.Log().Fatalf("Failed to generate completion script for shell '%s'", args[0])
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}
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return
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}
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l.Log().Fatalf("Shell '%s' not supported for completion", args[0])
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},
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}
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return cmd
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}
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