provider-kairos/internal/cli/recovery.go
2024-07-15 11:26:04 +02:00

104 lines
2.3 KiB
Go

package cli
import (
"context"
"fmt"
"io"
"os/exec"
"time"
"github.com/ipfs/go-log/v2"
"github.com/creack/pty"
"github.com/gliderlabs/ssh"
"github.com/mudler/edgevpn/cmd"
"github.com/mudler/edgevpn/pkg/logger"
"github.com/mudler/edgevpn/pkg/node"
"github.com/mudler/edgevpn/pkg/services"
"github.com/pterm/pterm"
cliV2 "github.com/urfave/cli/v2"
)
func startRecoveryService(ctx context.Context, loglevel string, c *cliV2.Context) error {
err := c.Set("log-level", loglevel)
if err != nil {
return err
}
nc := cmd.ConfigFromContext(c)
lvl, err := log.LevelFromString(loglevel)
if err != nil {
lvl = log.LevelError
}
llger := logger.New(lvl)
o, _, err := nc.ToOpts(llger)
if err != nil {
llger.Fatal(err.Error())
}
o = append(o,
services.Alive(
time.Duration(20)*time.Second,
time.Duration(10)*time.Second,
time.Duration(10)*time.Second)...)
// opts, err := vpn.Register(vpnOpts...)
// if err != nil {
// return err
// }
o = append(o, services.RegisterService(llger, time.Duration(5*time.Second), c.String("service"), c.String("listen"))...)
e, err := node.New(o...)
if err != nil {
return err
}
return e.Start(ctx)
}
func sshServer(listenAdddr, password string) {
ssh.Handle(func(s ssh.Session) {
cmd := exec.Command("/bin/bash")
ptyReq, winCh, isPty := s.Pty()
if isPty {
cmd.Env = append(cmd.Env, fmt.Sprintf("TERM=%s", ptyReq.Term))
f, err := pty.Start(cmd)
if err != nil {
pterm.Warning.Println("Failed reserving tty")
}
go func() {
for win := range winCh {
setWinsize(f, win.Width, win.Height)
}
}()
go func() {
io.Copy(f, s) //nolint:errcheck
}()
io.Copy(s, f) //nolint:errcheck
cmd.Wait() //nolint:errcheck
} else {
io.WriteString(s, "No PTY requested.\n") //nolint:errcheck
s.Exit(1) //nolint:errcheck
}
})
pterm.Info.Println(ssh.ListenAndServe(listenAdddr, nil, ssh.PasswordAuth(func(_ ssh.Context, pass string) bool {
return pass == password
}),
))
}
func StartRecoveryService(c *cliV2.Context) error {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
if err := startRecoveryService(ctx, "fatal", c); err != nil {
return err
}
sshServer(c.String("listen"), c.String("password"))
return fmt.Errorf("should not return")
}