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ssh.go
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ssh.go
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package action
import (
"errors"
"fmt"
"strings"
"bunnyshell.com/cli/pkg/api/component"
"bunnyshell.com/cli/pkg/api/environment"
"bunnyshell.com/cli/pkg/config"
k8sExec "bunnyshell.com/cli/pkg/k8s/kubectl/exec"
k8sWizard "bunnyshell.com/cli/pkg/wizard/k8s"
"github.com/fatih/color"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
)
var errInvalidPodName = errors.New("invalid pod name")
type SSHOptions struct {
Namespace string
PodName string
Container string
Shell string
NoTTY bool
NoBanner bool
}
func (o *SSHOptions) UpdateFlagSet(flags *pflag.FlagSet) {
flags.StringVar(&o.PodName, "pod", o.PodName, "Pod name in namespace/pod-name format")
flags.StringVar(&o.Container, "container", o.Container, "Container name")
flags.StringVar(&o.Shell, "shell", o.Shell, "Shell to use")
flags.BoolVar(&o.NoTTY, "no-tty", o.NoTTY, "Do not allocate a TTY")
flags.BoolVar(&o.NoBanner, "no-banner", o.NoBanner, "Do not show environment banner before ssh")
}
func (o *SSHOptions) MakeExecOptions(kubeConfig *environment.KubeConfigItem) *k8sExec.Options {
motd := "/opt/bunnyshell/motd.txt"
return &k8sExec.Options{
TTY: !o.NoTTY,
Stdin: true,
Command: []string{
"/bin/sh",
"-c",
fmt.Sprintf(
"[ -f %[1]s ] && cat %[1]s; %[2]s",
motd,
o.Shell,
),
},
KubeConfig: kubeConfig.Bytes,
}
}
func init() {
options := config.GetOptions()
settings := config.GetSettings()
sshOptions := SSHOptions{
Shell: "/bin/sh",
}
command := &cobra.Command{
Use: "ssh",
ValidArgsFunction: cobra.NoFileCompletions,
RunE: func(cmd *cobra.Command, args []string) error {
itemOptions := component.NewItemOptions(settings.Profile.Context.ServiceComponent)
componentItem, err := component.Get(itemOptions)
if err != nil {
return err
}
kubeConfigOptions := environment.NewKubeConfigOptions(componentItem.GetEnvironment())
kubeConfig, err := environment.KubeConfig(kubeConfigOptions)
if err != nil {
return err
}
execCommand, err := k8sExec.Exec(sshOptions.MakeExecOptions(kubeConfig))
if err != nil {
return err
}
podListOptions := &k8sWizard.PodListOptions{
Component: componentItem.GetId(),
}
containerListOptions := &k8sWizard.ContainerListOptions{
Client: execCommand.PodClient,
}
if err = ensureContainerSelected(&sshOptions, podListOptions, containerListOptions); err != nil {
return err
}
execCommand.Namespace = sshOptions.Namespace
execCommand.PodName = sshOptions.PodName
execCommand.ContainerName = sshOptions.Container
if err = execCommand.Validate(); err != nil {
return err
}
if !sshOptions.NoBanner {
showBanner(cmd, sshOptions, componentItem.GetEnvironment())
}
return execCommand.Run()
},
}
flags := command.Flags()
flags.AddFlag(options.ServiceComponent.GetRequiredFlag("id"))
sshOptions.UpdateFlagSet(flags)
mainCmd.AddCommand(command)
}
func ensureContainerSelected(
sshOptions *SSHOptions,
podListOptions *k8sWizard.PodListOptions,
containerListOptions *k8sWizard.ContainerListOptions,
) error {
if sshOptions.PodName != "" {
parts := strings.Split(sshOptions.PodName, "/")
if len(parts) != 2 {
return errInvalidPodName
}
sshOptions.Namespace = parts[0]
sshOptions.PodName = parts[1]
} else {
resource, err := k8sWizard.PodSelect(podListOptions)
if err != nil {
return err
}
sshOptions.PodName = resource.GetName()
sshOptions.Namespace = resource.GetNamespace()
}
if sshOptions.Container == "" {
containerListOptions.Namespace = sshOptions.Namespace
containerListOptions.PodName = sshOptions.PodName
container, err := k8sWizard.ContainerSelect(containerListOptions)
if err != nil {
return err
}
sshOptions.Container = container.Name
}
return nil
}
func showBanner(cmd *cobra.Command, sshOptions SSHOptions, environmentID string) {
bnsColor := color.New(color.BgBlue).Add(color.FgWhite).Add(color.Bold)
cmd.Printf(
"Environment: %s Pod: %s Container: %s\n",
bnsColor.Sprint(environmentID),
bnsColor.Sprint(sshOptions.Namespace)+"/"+getPodName(bnsColor, sshOptions),
bnsColor.Sprint(sshOptions.Container),
)
}
func getPodName(bnsColor *color.Color, sshOptions SSHOptions) string {
parts := strings.Split(sshOptions.PodName, "-")
for index, part := range parts {
parts[index] = bnsColor.Sprint(part)
}
return strings.Join(parts, "-")
}