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package common
import (
"context"
"fmt"
"github.com/hashicorp/packer/packer-plugin-sdk/multistep"
packersdk "github.com/hashicorp/packer/packer-plugin-sdk/packer"
"github.com/hashicorp/packer/packer-plugin-sdk/uuid"
)
// This step creates an external switch for the VM.
//
// Produces:
// SwitchName string - The name of the Switch
type StepCreateExternalSwitch struct {
SwitchName string
oldSwitchName string
}
// Run runs the step required to create an external switch. Depending on
// the connectivity of the host machine, the external switch will allow the
// build VM to connect to the outside world.
func (s *StepCreateExternalSwitch) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
driver := state.Get("driver").(Driver)
ui := state.Get("ui").(packersdk.Ui)
vmName := state.Get("vmName").(string)
errorMsg := "Error creating external switch: %s"
var err error
ui.Say("Creating external switch...")
packerExternalSwitchName := "paes_" + uuid.TimeOrderedUUID()
// CreateExternalVirtualSwitch checks for an existing external switch,
// creating one if required, and connects the VM to it
err = driver.CreateExternalVirtualSwitch(vmName, packerExternalSwitchName)
if err != nil {
err := fmt.Errorf(errorMsg, err)
state.Put("error", err)
ui.Error(err.Error())
s.SwitchName = ""
return multistep.ActionHalt
}
switchName, err := driver.GetVirtualMachineSwitchName(vmName)
if err != nil {
err := fmt.Errorf(errorMsg, err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
if len(switchName) == 0 {
err := fmt.Errorf(errorMsg, err)
state.Put("error", "Can't get the VM switch name")
ui.Error(err.Error())
return multistep.ActionHalt
}
ui.Say("External switch name is: '" + switchName + "'")
if switchName != packerExternalSwitchName {
s.SwitchName = ""
} else {
s.SwitchName = packerExternalSwitchName
s.oldSwitchName = state.Get("SwitchName").(string)
}
// Set the final name in the state bag so others can use it
state.Put("SwitchName", switchName)
return multistep.ActionContinue
}
func (s *StepCreateExternalSwitch) Cleanup(state multistep.StateBag) {
if s.SwitchName == "" {
return
}
driver := state.Get("driver").(Driver)
ui := state.Get("ui").(packersdk.Ui)
vmName := state.Get("vmName").(string)
ui.Say("Unregistering and deleting external switch...")
errMsg := "Error deleting external switch: %s"
// connect the vm to the old switch
if s.oldSwitchName == "" {
ui.Error(fmt.Sprintf(errMsg, "the old switch name is empty"))
return
}
err := driver.ConnectVirtualMachineNetworkAdapterToSwitch(vmName, s.oldSwitchName)
if err != nil {
ui.Error(fmt.Sprintf(errMsg, err))
return
}
state.Put("SwitchName", s.oldSwitchName)
err = driver.DeleteVirtualSwitch(s.SwitchName)
if err != nil {
ui.Error(fmt.Sprintf(errMsg, err))
}
}
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