feat: add labels options to server and ssh keys (#128)

Continuation of #92 

Adding labels to the temporary server and ssh key objects which are
needed to create the snapshot.

This is needed in some use cases where e.g. packer build stops
unexpectedly due to a SIGKILL and cannot shut down properly. In order to
realize that the respective server and ssh key are orphaned, labels are
needed.

---------

Signed-off-by: janiskemper <janis.kemper@syself.com>
Co-authored-by: janiskemper <janis.kemper@syself.com>

.web-docs/components/builder/hcloud/README.md

@@ -67,6 +67,9 @@ builder.
 - `server_name` (string) - The name assigned to the server. The Hetzner Cloud
   sets the hostname of the machine to this value.
 
+- `server_labels` (map of key/value strings) - Key/value pair labels to
+  apply to the created server.
+
 - `snapshot_name` (string) - The name of the resulting snapshot that will
   appear in your account as image description. Defaults to `packer-{{timestamp}}` (see
   [configuration templates](/packer/docs/templates/legacy_json_templates/engine) for more info).
@@ -87,6 +90,9 @@ builder.
 - `user_data_file` (string) - Path to a file that will be used for the user
   data when launching the server.
 
+- `ssh_keys_labels` (map of key/value strings) - Key/value pair labels to
+  apply to the created ssh keys.
+
 - `ssh_keys` (array of strings) - List of SSH keys by name or id to be added
   to image on launch.
 

builder/hcloud/config.go

@@ -32,18 +32,20 @@ type Config struct {
 
 	PollInterval time.Duration `mapstructure:"poll_interval"`
 
-	ServerName        string       `mapstructure:"server_name"`
-	Location          string       `mapstructure:"location"`
-	ServerType        string       `mapstructure:"server_type"`
-	UpgradeServerType string       `mapstructure:"upgrade_server_type"`
-	Image             string       `mapstructure:"image"`
-	ImageFilter       *imageFilter `mapstructure:"image_filter"`
+	ServerName        string            `mapstructure:"server_name"`
+	Location          string            `mapstructure:"location"`
+	ServerType        string            `mapstructure:"server_type"`
+	ServerLabels      map[string]string `mapstructure:"server_labels"`
+	UpgradeServerType string            `mapstructure:"upgrade_server_type"`
+	Image             string            `mapstructure:"image"`
+	ImageFilter       *imageFilter      `mapstructure:"image_filter"`
 
 	SnapshotName   string            `mapstructure:"snapshot_name"`
 	SnapshotLabels map[string]string `mapstructure:"snapshot_labels"`
 	UserData       string            `mapstructure:"user_data"`
 	UserDataFile   string            `mapstructure:"user_data_file"`
 	SSHKeys        []string          `mapstructure:"ssh_keys"`
+	SSHKeysLabels  map[string]string `mapstructure:"ssh_keys_labels"`
 	Networks       []int64           `mapstructure:"networks"`
 
 	RescueMode string `mapstructure:"rescue"`

builder/hcloud/step_create_server.go

@@ -83,14 +83,14 @@ func (s *stepCreateServer) Run(ctx context.Context, state multistep.StateBag) mu
 		Location:   &hcloud.Location{Name: c.Location},
 		UserData:   userData,
 		Networks:   networks,
+		Labels:     c.ServerLabels,
 	}
 
 	if c.UpgradeServerType != "" {
 		serverCreateOpts.StartAfterCreate = hcloud.Ptr(false)
 	}
 
 	serverCreateResult, _, err := client.Server.Create(ctx, serverCreateOpts)
-
 	if err != nil {
 		err := fmt.Errorf("Error creating server: %s", err)
 		state.Put("error", err)
@@ -128,7 +128,6 @@ func (s *stepCreateServer) Run(ctx context.Context, state multistep.StateBag) mu
 			ServerType:  &hcloud.ServerType{Name: c.UpgradeServerType},
 			UpgradeDisk: false,
 		})
-
 		if err != nil {
 			err := fmt.Errorf("Error changing server-type: %s", err)
 			state.Put("error", err)
@@ -145,7 +144,6 @@ func (s *stepCreateServer) Run(ctx context.Context, state multistep.StateBag) mu
 
 		ui.Say("Starting server...")
 		serverPoweronAction, _, err := client.Server.Poweron(ctx, serverCreateResult.Server)
-
 		if err != nil {
 			err := fmt.Errorf("Error starting server: %s", err)
 			state.Put("error", err)
@@ -257,7 +255,7 @@ func waitForAction(ctx context.Context, client *hcloud.Client, action *hcloud.Ac
 func getImageWithSelectors(ctx context.Context, client *hcloud.Client, c *Config, serverType *hcloud.ServerType) (*hcloud.Image, error) {
 	var allImages []*hcloud.Image
 
-	var selector = strings.Join(c.ImageFilter.WithSelector, ",")
+	selector := strings.Join(c.ImageFilter.WithSelector, ",")
 	opts := hcloud.ImageListOpts{
 		ListOpts:     hcloud.ListOpts{LabelSelector: selector},
 		Status:       []hcloud.ImageStatus{hcloud.ImageStatusAvailable},

builder/hcloud/step_create_sshkey.go

@@ -37,6 +37,7 @@ func (s *stepCreateSSHKey) Run(ctx context.Context, state multistep.StateBag) mu
 	key, _, err := client.SSHKey.Create(ctx, hcloud.SSHKeyCreateOpts{
 		Name:      name,
 		PublicKey: string(c.Comm.SSHPublicKey),
+		Labels:    c.SSHKeysLabels,
 	})
 	if err != nil {
 		err := fmt.Errorf("Error creating temporary SSH key: %s", err)

docs/builders/hcloud.mdx

@@ -80,6 +80,9 @@ builder.
 - `server_name` (string) - The name assigned to the server. The Hetzner Cloud
   sets the hostname of the machine to this value.
 
+- `server_labels` (map of key/value strings) - Key/value pair labels to
+  apply to the created server.
+
 - `snapshot_name` (string) - The name of the resulting snapshot that will
   appear in your account as image description. Defaults to `packer-{{timestamp}}` (see
   [configuration templates](/packer/docs/templates/legacy_json_templates/engine) for more info).
@@ -100,6 +103,9 @@ builder.
 - `user_data_file` (string) - Path to a file that will be used for the user
   data when launching the server.
 
+- `ssh_keys_labels` (map of key/value strings) - Key/value pair labels to
+  apply to the created ssh keys.
+
 - `ssh_keys` (array of strings) - List of SSH keys by name or id to be added
   to image on launch.