README.md

@@ -15,8 +15,8 @@ You can find sources and pre-compiled binaries [here](https://github.com/JonasPr
 
 ```bash
 # Download the binary (this example downloads the binary for linux amd64)
-$ wget https://github.com/JonasProgrammer/docker-machine-driver-hetzner/releases/download/3.9.2/docker-machine-driver-hetzner_3.9.2_linux_amd64.tar.gz
-$ tar -xvf docker-machine-driver-hetzner_3.9.2_linux_amd64.tar.gz
+$ wget https://github.com/JonasProgrammer/docker-machine-driver-hetzner/releases/download/3.10.0/docker-machine-driver-hetzner_3.10.0_linux_amd64.tar.gz
+$ tar -xvf docker-machine-driver-hetzner_3.10.0_linux_amd64.tar.gz
 
 # Make it executable and copy the binary in a directory accessible with your $PATH
 $ chmod +x docker-machine-driver-hetzner
@@ -100,6 +100,7 @@ $ docker-machine create \
   see [SSH Keys API](https://docs.hetzner.cloud/#resources-ssh-keys-get) for how to get a list
 - `--hetzner-additional-key`: Upload an additional public key associated with the server, or associate an existing one with the same fingerprint. Can be specified multiple times.
 - `--hetzner-user-data`: Cloud-init based User data
+- `--hetzner-user-data-from-file`: Use Cloud-init based User data as file, `--hetzner-user-data` as file name
 - `--hetzner-volumes`: Volume IDs or names which should be attached to the server
 - `--hetzner-networks`: Network IDs or names which should be attached to the server private network interface
 - `--hetzner-use-private-network`: Use private network

driver.go

@@ -39,6 +39,7 @@ type Driver struct {
 	ServerID          int
 	cachedServer      *hcloud.Server
 	userData          string
+	userDataFromFile  bool
 	Volumes           []string
 	Networks          []string
 	UsePrivateNetwork bool
@@ -71,6 +72,7 @@ const (
 	flagExKeyID           = "hetzner-existing-key-id"
 	flagExKeyPath         = "hetzner-existing-key-path"
 	flagUserData          = "hetzner-user-data"
+	flagUserDataFromFile  = "hetzner-user-data-from-file"
 	flagVolumes           = "hetzner-volumes"
 	flagNetworks          = "hetzner-networks"
 	flagUsePrivateNetwork = "hetzner-use-private-network"
@@ -163,6 +165,11 @@ func (d *Driver) GetCreateFlags() []mcnflag.Flag {
 			Usage:  "Cloud-init based User data",
 			Value:  "",
 		},
+		mcnflag.BoolFlag{
+			EnvVar: "HETZNER_USER_DATA_FROM_FILE",
+			Name:   flagUserDataFromFile,
+			Usage:  "Cloud-init based User data is file",
+		},
 		mcnflag.StringSliceFlag{
 			EnvVar: "HETZNER_VOLUMES",
 			Name:   flagVolumes,
@@ -273,6 +280,7 @@ func (d *Driver) setConfigFromFlagsImpl(opts drivers.DriverOptions) error {
 	d.IsExistingKey = d.KeyID != 0
 	d.originalKey = opts.String(flagExKeyPath)
 	d.userData = opts.String(flagUserData)
+	d.userDataFromFile = opts.Bool(flagUserDataFromFile)
 	d.Volumes = opts.StringSlice(flagVolumes)
 	d.Networks = opts.StringSlice(flagNetworks)
 	disablePublic := opts.Bool(flagDisablePublic)
@@ -526,9 +534,14 @@ func (d *Driver) makeCreateServerOptions() (*hcloud.ServerCreateOpts, error) {
 		return nil, err
 	}
 
+	userData, err := d.getUserData()
+	if err != nil {
+		return nil, err
+	}
+
 	srvopts := hcloud.ServerCreateOpts{
 		Name:           d.GetMachineName(),
-		UserData:       d.userData,
+		UserData:       userData,
 		Labels:         d.ServerLabels,
 		PlacementGroup: pgrp,
 	}
@@ -573,6 +586,20 @@ func (d *Driver) makeCreateServerOptions() (*hcloud.ServerCreateOpts, error) {
 	return &srvopts, nil
 }
 
+func (d *Driver) getUserData() (string, error) {
+	userData := d.userData
+
+	if !d.userDataFromFile {
+		return userData, nil
+	}
+
+	readUserData, err := os.ReadFile(d.userData)
+	if err != nil {
+		return "", err
+	}
+	return string(readUserData), nil
+}
+
 func (d *Driver) setPublicNetIfRequired(srvopts *hcloud.ServerCreateOpts) error {
 	pip4, err := d.getPrimaryIPv4()
 	if err != nil {