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step_create_instance.go
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/
step_create_instance.go
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package cloudstack
import (
"context"
"encoding/base64"
"errors"
"fmt"
"net"
"strings"
"github.com/hashicorp/packer/common"
"github.com/hashicorp/packer/helper/multistep"
"github.com/hashicorp/packer/packer"
"github.com/hashicorp/packer/template/interpolate"
"github.com/xanzy/go-cloudstack/cloudstack"
)
// userDataTemplateData represents variables for user_data interpolation
type userDataTemplateData struct {
HTTPIP string
HTTPPort uint
}
// stepCreateInstance represents a Packer build step that creates CloudStack instances.
type stepCreateInstance struct {
Debug bool
Ctx interpolate.Context
}
// Run executes the Packer build step that creates a CloudStack instance.
func (s *stepCreateInstance) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
client := state.Get("client").(*cloudstack.CloudStackClient)
config := state.Get("config").(*Config)
ui := state.Get("ui").(packer.Ui)
ui.Say("Creating instance...")
// Create a new parameter struct.
p := client.VirtualMachine.NewDeployVirtualMachineParams(
config.ServiceOffering,
state.Get("source").(string),
config.Zone,
)
// Configure the instance.
p.SetName(config.InstanceName)
p.SetDisplayname("Created by Packer")
if keypair, ok := state.GetOk("keypair"); ok {
kp := keypair.(string)
ui.Message(fmt.Sprintf("Using keypair: %s", kp))
p.SetKeypair(kp)
}
if securitygroups, ok := state.GetOk("security_groups"); ok {
p.SetSecuritygroupids(securitygroups.([]string))
}
// If we use an ISO, configure the disk offering.
if config.SourceISO != "" {
p.SetDiskofferingid(config.DiskOffering)
p.SetHypervisor(config.Hypervisor)
}
// If we use a template, set the root disk size.
if config.SourceTemplate != "" && config.DiskSize > 0 {
p.SetRootdisksize(config.DiskSize)
}
// Retrieve the zone object.
zone, _, err := client.Zone.GetZoneByID(config.Zone)
if err != nil {
err := fmt.Errorf("Failed to get zone %s by ID: %s", config.Zone, err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
if zone.Networktype == "Advanced" {
// Set the network ID's.
p.SetNetworkids([]string{config.Network})
}
// If there is a project supplied, set the project id.
if config.Project != "" {
p.SetProjectid(config.Project)
}
if config.UserData != "" {
httpPort := state.Get("http_port").(uint)
httpIP, err := hostIP()
if err != nil {
err := fmt.Errorf("Failed to determine host IP: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
common.SetHTTPIP(httpIP)
s.Ctx.Data = &userDataTemplateData{
httpIP,
httpPort,
}
ud, err := s.generateUserData(config.UserData, config.HTTPGetOnly)
if err != nil {
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
p.SetUserdata(ud)
}
// Create the new instance.
instance, err := client.VirtualMachine.DeployVirtualMachine(p)
if err != nil {
err := fmt.Errorf("Error creating new instance %s: %s", config.InstanceName, err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
ui.Message("Instance has been created!")
ui.Message(fmt.Sprintf("Instance ID: %s", instance.Id))
// In debug-mode, we output the password
if s.Debug {
ui.Message(fmt.Sprintf(
"Password (since debug is enabled) \"%s\"", instance.Password))
}
// Set the auto generated password if a password was not explicitly configured.
switch config.Comm.Type {
case "ssh":
if config.Comm.SSHPassword == "" {
config.Comm.SSHPassword = instance.Password
}
case "winrm":
if config.Comm.WinRMPassword == "" {
config.Comm.WinRMPassword = instance.Password
}
}
// Set the host address when using the local IP address to connect.
if config.UseLocalIPAddress {
state.Put("ipaddress", instance.Nic[0].Ipaddress)
}
// Store the instance ID so we can remove it later.
state.Put("instance_id", instance.Id)
return multistep.ActionContinue
}
// Cleanup any resources that may have been created during the Run phase.
func (s *stepCreateInstance) Cleanup(state multistep.StateBag) {
client := state.Get("client").(*cloudstack.CloudStackClient)
config := state.Get("config").(*Config)
ui := state.Get("ui").(packer.Ui)
instanceID, ok := state.Get("instance_id").(string)
if !ok || instanceID == "" {
return
}
// Create a new parameter struct.
p := client.VirtualMachine.NewDestroyVirtualMachineParams(instanceID)
ui.Say("Deleting instance...")
if _, err := client.VirtualMachine.DestroyVirtualMachine(p); err != nil {
// This is a very poor way to be told the ID does no longer exist :(
if strings.Contains(err.Error(), fmt.Sprintf(
"Invalid parameter id value=%s due to incorrect long value format, "+
"or entity does not exist", instanceID)) {
return
}
ui.Error(fmt.Sprintf("Error destroying instance. Please destroy it manually.\n\n"+
"\tName: %s\n"+
"\tError: %s", config.InstanceName, err))
return
}
// We could expunge the VM while destroying it, but if the user doesn't have
// rights that single call could error out leaving the VM running. So but
// splitting these calls we make sure the VM is always deleted, even when the
// expunge fails.
if config.Expunge {
// Create a new parameter struct.
p := client.VirtualMachine.NewExpungeVirtualMachineParams(instanceID)
ui.Say("Expunging instance...")
if _, err := client.VirtualMachine.ExpungeVirtualMachine(p); err != nil {
// This is a very poor way to be told the ID does no longer exist :(
if strings.Contains(err.Error(), fmt.Sprintf(
"Invalid parameter id value=%s due to incorrect long value format, "+
"or entity does not exist", instanceID)) {
return
}
ui.Error(fmt.Sprintf("Error expunging instance. Please expunge it manually.\n\n"+
"\tName: %s\n"+
"\tError: %s", config.InstanceName, err))
return
}
}
ui.Message("Instance has been deleted!")
return
}
// generateUserData returns the user data as a base64 encoded string.
func (s *stepCreateInstance) generateUserData(userData string, httpGETOnly bool) (string, error) {
renderedUserData, err := interpolate.Render(userData, &s.Ctx)
if err != nil {
return "", fmt.Errorf("Error rendering user_data: %s", err)
}
ud := base64.StdEncoding.EncodeToString([]byte(renderedUserData))
// DeployVirtualMachine uses POST by default which allows 32K of
// userdata. If using GET instead the userdata is limited to 2K.
maxUD := 32768
if httpGETOnly {
maxUD = 2048
}
if len(ud) > maxUD {
return "", fmt.Errorf(
"The supplied user_data contains %d bytes after encoding, "+
"this exceeds the limit of %d bytes", len(ud), maxUD)
}
return ud, nil
}
func hostIP() (string, error) {
addrs, err := net.InterfaceAddrs()
if err != nil {
return "", err
}
for _, addr := range addrs {
if ipnet, ok := addr.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
if ipnet.IP.To4() != nil {
return ipnet.IP.String(), nil
}
}
}
return "", errors.New("No host IP found")
}