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package qemu
import (
"context"
"fmt"
"log"
"os"
"time"
"github.com/digitalocean/go-qemu/qmp"
"github.com/hashicorp/packer/packer-plugin-sdk/multistep"
packersdk "github.com/hashicorp/packer/packer-plugin-sdk/packer"
)
// This step configures the VM to enable the QMP listener.
//
// Uses:
// config *config
// ui packersdk.Ui
//
// Produces:
type stepConfigureQMP struct {
monitor *qmp.SocketMonitor
QMPSocketPath string
}
func (s *stepConfigureQMP) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
config := state.Get("config").(*Config)
ui := state.Get("ui").(packersdk.Ui)
if !config.QMPEnable {
return multistep.ActionContinue
}
ui.Say(fmt.Sprintf("QMP socket at: %s", s.QMPSocketPath))
// Only initialize and open QMP when we have a use for it.
// Open QMP socket
var err error
var cmd []byte
var result []byte
s.monitor, err = qmp.NewSocketMonitor("unix", s.QMPSocketPath, 2*time.Second)
if err != nil {
err := fmt.Errorf("Error opening QMP socket: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
// Connect to QMP
// function automatically calls capabilities so is immediately ready for commands
err = s.monitor.Connect()
if err != nil {
err := fmt.Errorf("Error connecting to QMP socket: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
log.Printf("QMP socket open SUCCESS")
vncPassword := state.Get("vnc_password")
if vncPassword != "" {
cmd = []byte(fmt.Sprintf("{ \"execute\": \"change-vnc-password\", \"arguments\": { \"password\": \"%s\" } }",
vncPassword))
result, err = s.monitor.Run(cmd)
if err != nil {
err := fmt.Errorf("Error connecting to QMP socket: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
log.Printf("QMP Command: %s\nResult: %s", cmd, result)
}
// make the qmp_monitor available to other steps.
state.Put("qmp_monitor", s.monitor)
return multistep.ActionContinue
}
func (s *stepConfigureQMP) Cleanup(multistep.StateBag) {
if s.monitor != nil {
err := s.monitor.Disconnect()
if err != nil {
log.Printf("failed to disconnect QMP: %v", err)
}
// Delete file associated with qmp socket.
if err := os.Remove(s.QMPSocketPath); err != nil {
log.Printf("Failed to delete the qmp socket file: %s", err)
}
}
}
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