packer-cn/builder/googlecompute/step_create_instance.go

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package googlecompute
import (
"errors"
"fmt"
"time"
"github.com/mitchellh/multistep"
"github.com/mitchellh/packer/packer"
)
// StepCreateInstance represents a Packer build step that creates GCE instances.
type StepCreateInstance struct {
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Debug bool
instanceName string
}
func (config *Config) getImage() (Image) {
project := config.ProjectId
if config.SourceImageProjectId != "" {
project = config.SourceImageProjectId
}
return Image{Name: config.SourceImage, ProjectId: project}
}
// Run executes the Packer build step that creates a GCE instance.
func (s *StepCreateInstance) Run(state multistep.StateBag) multistep.StepAction {
config := state.Get("config").(*Config)
driver := state.Get("driver").(Driver)
sshPublicKey := state.Get("ssh_public_key").(string)
ui := state.Get("ui").(packer.Ui)
ui.Say("Creating instance...")
name := config.InstanceName
errCh, err := driver.RunInstance(&InstanceConfig{
Description: "New instance created by Packer",
DiskSizeGb: config.DiskSizeGb,
Image: config.getImage(),
MachineType: config.MachineType,
Metadata: map[string]string{
"sshKeys": fmt.Sprintf("%s:%s", config.SSHUsername, sshPublicKey),
},
Name: name,
Network: config.Network,
Tags: config.Tags,
Zone: config.Zone,
})
if err == nil {
ui.Message("Waiting for creation operation to complete...")
select {
case err = <-errCh:
case <-time.After(config.stateTimeout):
err = errors.New("time out while waiting for instance to create")
}
}
if err != nil {
err := fmt.Errorf("Error creating instance: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
ui.Message("Instance has been created!")
if s.Debug {
if name != "" {
ui.Message(fmt.Sprintf("Instance: %s started in %s", name, config.Zone))
}
}
// Things succeeded, store the name so we can remove it later
state.Put("instance_name", name)
s.instanceName = name
return multistep.ActionContinue
}
// Cleanup destroys the GCE instance created during the image creation process.
func (s *StepCreateInstance) Cleanup(state multistep.StateBag) {
if s.instanceName == "" {
return
}
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config := state.Get("config").(*Config)
driver := state.Get("driver").(Driver)
ui := state.Get("ui").(packer.Ui)
ui.Say("Deleting instance...")
errCh, err := driver.DeleteInstance(config.Zone, s.instanceName)
if err == nil {
select {
case err = <-errCh:
case <-time.After(config.stateTimeout):
err = errors.New("time out while waiting for instance to delete")
}
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}
if err != nil {
ui.Error(fmt.Sprintf(
"Error deleting instance. Please delete it manually.\n\n"+
"Name: %s\n"+
"Error: %s", s.instanceName, err))
}
s.instanceName = ""
return
}