/
root.go
180 lines (156 loc) · 5.38 KB
/
root.go
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package cmd
import (
"errors"
"flag"
"fmt"
"net/http"
"os"
"strings"
"github.com/moby/term"
"github.com/spf13/cobra"
"k8s.io/klog/v2"
)
var releaseVersion string
var cliopts Options
var rootCmd = &cobra.Command{
Use: "kubectl-execws <pod name> [options] -- <cmd>",
DisableFlagsInUseLine: true,
Short: "kubectl exec over WebSockets",
Long: `A replacement for "kubectl exec" that works over WebSocket connections.`,
Args: cobra.MinimumNArgs(1),
Version: releaseVersion,
SilenceUsage: true,
SilenceErrors: true,
/*CompletionOptions: cobra.CompletionOptions{
DisableDefaultCmd: false,
HiddenDefaultCmd: true,
DisableNoDescFlag: true,
DisableDescriptions: false,
},*/
RunE: func(cmd *cobra.Command, args []string) error {
var object, pod string
var command []string
if strings.Contains(args[0], "/") {
parts := strings.Split(args[0], "/")
object = parts[0]
pod = parts[1]
command = args[1:]
} else {
object = "pod"
pod = args[0]
command = args[1:]
}
if object != "pod" {
return errors.New("Non pod object not yet supported")
}
if len(command) == 0 {
if cliopts.TTY {
command = []string{"sh", "-c", "exec $(command -v bash || command -v ash || command -v sh)"}
} else {
return errors.New("Please specify a command")
}
}
cliopts.Pod = pod
cliopts.Object = object
cliopts.Command = command
s, err := NewCliSession(&cliopts)
if err != nil {
return err
}
if s.opts.noSanityCheck && s.opts.directExec {
if s.opts.directExecNodeIp == "" {
return errors.New("When using direct-exec you must either allow preflight request or provide node IP via --node-direct-exec-ip")
}
if s.opts.Container == "" {
return errors.New("When using direct-exec you must either allow preflight request or provide target container name via -c")
}
}
// propagate logging flags
flag.Set("v", fmt.Sprint(cliopts.Loglevel))
flag.Set("stderrthreshold", fmt.Sprint(cliopts.Loglevel))
s.sanityCheck()
var req *http.Request
if s.opts.directExec {
req, err = s.prepKubeletExec()
if err != nil {
return err
}
} else {
req, err = s.prepExec()
if err != nil {
return err
}
}
return s.doExec(req)
},
ValidArgsFunction: MainValidArgs,
}
// add our own explicit completion helper
var completionCmd = &cobra.Command{
Use: "completion [bash|zsh|fish|powershell]",
DisableFlagsInUseLine: true,
Short: "Generate completion script",
Long: fmt.Sprintf(`Generate the autocompletion script for %[1]s for the specified shell.`, rootCmd.Root().Name()),
ValidArgs: []string{"bash", "zsh", "fish", "powershell"},
Args: cobra.MatchAll(cobra.ExactArgs(1), cobra.OnlyValidArgs),
Hidden: true,
Run: func(cmd *cobra.Command, args []string) {
_, stdOut, _ := term.StdStreams()
switch args[0] {
case "bash":
cmd.Root().GenBashCompletionV2(stdOut, true)
case "zsh":
cmd.Root().GenZshCompletion(stdOut)
case "fish":
cmd.Root().GenFishCompletion(stdOut, true)
case "powershell":
cmd.Root().GenPowerShellCompletionWithDesc(stdOut)
}
},
}
/*var versionCmd = &cobra.Command{
Use: "version",
Short: "Print program version",
DisableFlagsInUseLine: true,
Hidden: true,
Args: cobra.ExactArgs(0),
Run: func(cmd *cobra.Command, args []string) {
fmt.Printf(releaseVersion)
},
}*/
func Execute() {
klog.InitFlags(nil)
err := rootCmd.Execute()
if err != nil {
klog.Exit(err)
}
os.Exit(0)
}
// shortcut to the hidden subcomand used for completion
func Complete() {
rootCmd.SetArgs(append([]string{cobra.ShellCompRequestCmd}, os.Args[1:]...))
err := rootCmd.Execute()
if err != nil {
os.Exit(1)
}
os.Exit(0)
}
func init() {
rootCmd.PersistentFlags().StringVar(&cliopts.Kconfig, "kubeconfig", "", "kubeconfig file (default is $HOME/.kube/config)")
rootCmd.PersistentFlags().StringVarP(&cliopts.Namespace, "namespace", "n", "", "Set namespace")
rootCmd.PersistentFlags().IntVarP(&cliopts.Loglevel, "loglevel", "v", 2, "Set loglevel")
rootCmd.PersistentFlags().BoolVarP(&cliopts.noTLSVerify, "skip-tls-verify", "k", false, "Don't perform TLS certificate verifiation")
rootCmd.PersistentFlags().StringVar(&cliopts.Impersonate, "as", "", "Impersonate another user")
rootCmd.PersistentFlags().StringVar(&cliopts.Context, "context", "", "Use specific kubeconfig ctx")
rootCmd.Flags().BoolVarP(&cliopts.TTY, "tty", "t", false, "Stdin is a TTY")
rootCmd.Flags().BoolVarP(&cliopts.Stdin, "stdin", "i", false, "Pass stdin to container")
rootCmd.Flags().StringVarP(&cliopts.Container, "container", "c", "", "Container name")
rootCmd.Flags().BoolVar(&cliopts.noSanityCheck, "no-sanity-check", false, "Don't make preflight request to ensure pod exists")
rootCmd.Flags().BoolVar(&cliopts.directExec, "node-direct-exec", false, "Partially bypass the API server, by using the kubelet API")
rootCmd.Flags().StringVar(&cliopts.directExecNodeIp, "node-direct-exec-ip", "", "Node IP to use with direct-exec feature")
rootCmd.AddCommand(completionCmd)
//rootCmd.AddCommand(versionCmd)
rootCmd.RegisterFlagCompletionFunc("namespace", NamespaceValidArgs)
rootCmd.RegisterFlagCompletionFunc("container", ContainerValidArgs)
rootCmd.SetHelpCommand(&cobra.Command{Hidden: true})
}