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step_create_server.go
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/
step_create_server.go
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package hcloud
import (
"context"
"fmt"
"io/ioutil"
"sort"
"strings"
"github.com/Bourne-ID/packer/packer-plugin-sdk/multistep"
packersdk "github.com/Bourne-ID/packer/packer-plugin-sdk/packer"
"github.com/hetznercloud/hcloud-go/hcloud"
)
type stepCreateServer struct {
serverId int
}
func (s *stepCreateServer) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
client := state.Get("hcloudClient").(*hcloud.Client)
ui := state.Get("ui").(packersdk.Ui)
c := state.Get("config").(*Config)
sshKeyId := state.Get("ssh_key_id").(int)
// Create the server based on configuration
ui.Say("Creating server...")
userData := c.UserData
if c.UserDataFile != "" {
contents, err := ioutil.ReadFile(c.UserDataFile)
if err != nil {
state.Put("error", fmt.Errorf("Problem reading user data file: %s", err))
return multistep.ActionHalt
}
userData = string(contents)
}
sshKeys := []*hcloud.SSHKey{{ID: sshKeyId}}
for _, k := range c.SSHKeys {
sshKey, _, err := client.SSHKey.Get(ctx, k)
if err != nil {
ui.Error(err.Error())
state.Put("error", fmt.Errorf("Error fetching SSH key: %s", err))
return multistep.ActionHalt
}
if sshKey == nil {
state.Put("error", fmt.Errorf("Could not find key: %s", k))
return multistep.ActionHalt
}
sshKeys = append(sshKeys, sshKey)
}
var image *hcloud.Image
if c.Image != "" {
image = &hcloud.Image{Name: c.Image}
} else {
var err error
image, err = getImageWithSelectors(ctx, client, c)
if err != nil {
ui.Error(err.Error())
state.Put("error", err)
return multistep.ActionHalt
}
ui.Message(fmt.Sprintf("Using image %s with ID %d", image.Description, image.ID))
}
serverCreateResult, _, err := client.Server.Create(ctx, hcloud.ServerCreateOpts{
Name: c.ServerName,
ServerType: &hcloud.ServerType{Name: c.ServerType},
Image: image,
SSHKeys: sshKeys,
Location: &hcloud.Location{Name: c.Location},
UserData: userData,
})
if err != nil {
err := fmt.Errorf("Error creating server: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
state.Put("server_ip", serverCreateResult.Server.PublicNet.IPv4.IP.String())
// We use this in cleanup
s.serverId = serverCreateResult.Server.ID
// Store the server id for later
state.Put("server_id", serverCreateResult.Server.ID)
// instance_id is the generic term used so that users can have access to the
// instance id inside of the provisioners, used in step_provision.
state.Put("instance_id", serverCreateResult.Server.ID)
if err := waitForAction(ctx, client, serverCreateResult.Action); err != nil {
err := fmt.Errorf("Error creating server: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
for _, nextAction := range serverCreateResult.NextActions {
if err := waitForAction(ctx, client, nextAction); err != nil {
err := fmt.Errorf("Error creating server: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
}
if c.RescueMode != "" {
ui.Say("Enabling Rescue Mode...")
rootPassword, err := setRescue(ctx, client, serverCreateResult.Server, c.RescueMode, sshKeys)
if err != nil {
err := fmt.Errorf("Error enabling rescue mode: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
ui.Say("Reboot server...")
action, _, err := client.Server.Reset(ctx, serverCreateResult.Server)
if err != nil {
err := fmt.Errorf("Error rebooting server: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
if err := waitForAction(ctx, client, action); err != nil {
err := fmt.Errorf("Error rebooting server: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
if c.RescueMode == "freebsd64" {
// We will set this only on freebsd
ui.Say("Using Root Password instead of SSH Keys...")
c.Comm.SSHPassword = rootPassword
}
}
return multistep.ActionContinue
}
func (s *stepCreateServer) Cleanup(state multistep.StateBag) {
// If the serverID isn't there, we probably never created it
if s.serverId == 0 {
return
}
client := state.Get("hcloudClient").(*hcloud.Client)
ui := state.Get("ui").(packersdk.Ui)
// Destroy the server we just created
ui.Say("Destroying server...")
_, err := client.Server.Delete(context.TODO(), &hcloud.Server{ID: s.serverId})
if err != nil {
ui.Error(fmt.Sprintf(
"Error destroying server. Please destroy it manually: %s", err))
}
}
func setRescue(ctx context.Context, client *hcloud.Client, server *hcloud.Server, rescue string, sshKeys []*hcloud.SSHKey) (string, error) {
rescueChanged := false
if server.RescueEnabled {
rescueChanged = true
action, _, err := client.Server.DisableRescue(ctx, server)
if err != nil {
return "", err
}
if err := waitForAction(ctx, client, action); err != nil {
return "", err
}
}
if rescue != "" {
rescueChanged = true
if rescue == "freebsd64" {
sshKeys = nil // freebsd64 doesn't allow ssh keys so we will remove them here
}
res, _, err := client.Server.EnableRescue(ctx, server, hcloud.ServerEnableRescueOpts{
Type: hcloud.ServerRescueType(rescue),
SSHKeys: sshKeys,
})
if err != nil {
return "", err
}
if err := waitForAction(ctx, client, res.Action); err != nil {
return "", err
}
return res.RootPassword, nil
}
if rescueChanged {
action, _, err := client.Server.Reset(ctx, server)
if err != nil {
return "", err
}
if err := waitForAction(ctx, client, action); err != nil {
return "", err
}
}
return "", nil
}
func waitForAction(ctx context.Context, client *hcloud.Client, action *hcloud.Action) error {
_, errCh := client.Action.WatchProgress(ctx, action)
if err := <-errCh; err != nil {
return err
}
return nil
}
func getImageWithSelectors(ctx context.Context, client *hcloud.Client, c *Config) (*hcloud.Image, error) {
var allImages []*hcloud.Image
var selector = strings.Join(c.ImageFilter.WithSelector, ",")
opts := hcloud.ImageListOpts{
ListOpts: hcloud.ListOpts{LabelSelector: selector},
Status: []hcloud.ImageStatus{hcloud.ImageStatusAvailable},
}
allImages, err := client.Image.AllWithOpts(ctx, opts)
if err != nil {
return nil, err
}
if len(allImages) == 0 {
return nil, fmt.Errorf("no image found for selector %q", selector)
}
if len(allImages) > 1 {
if !c.ImageFilter.MostRecent {
return nil, fmt.Errorf("more than one image found for selector %q", selector)
}
sort.Slice(allImages, func(i, j int) bool {
return allImages[i].Created.After(allImages[j].Created)
})
}
return allImages[0], nil
}